Leica R9

35mm MF film SLR camera

Specification

Production details:
Announced:2002
Order No.:10090 - anthracite finish
10091 - black finish
System: Leica R (1964)
Format:
Maximum format:35mm full frame
Film type:135 cartridge-loaded film
Mount and Flange focal distance:Leica R [47mm]
Shutter:
Type:Focal-plane
Model:Electronically controlled
Speeds:16 - 1/8000 + B
Exposure:
Exposure metering:Through-the-lens (TTL), open-aperture
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Physical characteristics:
Weight:790g
Dimensions:158x101x62mm
Accessories:
Body cap:14103

Manufacturer description #1

05 - 09/2002 - LEICA R9

At photokina 2002 in Cologne, Germany, Leica Camera AG introduced the LEICA R9, a single lens reflex camera that incorporates numerous enhanced characteristics that are important photographically. Thanks to the use of new materials such as magnesium, the new camera is 100 grams (just over 3 1/2 ounces) lighter than the current top-of-the-line model LEICA R8, yet it retains the very same rigidity. A new exposure counter on the top cover and additional information shown on the display on the back cover give the photographer an improved overview of all the important parameters. An innovative multi-pattern exposure metering system that adjusts in tenths of an f-stop further increases the high precision exposure metering for which the LEICA R8 was already recognized. An even more balanced control of flash exposures in the Program mode and the new capability of using flash with ultra-fast shutter speeds up to 1/8000 second expand the creative possibilities. The reliability of the camera, which was already high, was enhanced even further by means of useful details, such as an operating mode selector dial that now locks firmly in place.

“With the LEICA R9, Leica Camera AG is offering a new, further improved precision instrument for the 28 high-performance lenses of the Leica R single lens reflex assortment,” explains Stefan Daniel, manager of the business unit for system products. “Six years after the introduction of the LEICA R8, we assembled an extensive package of improvements that takes into account numerous suggestions made by professional and semi-professional users and that employs new technologies and processes.”

With the announcement of the LEICA R9 and the introduction of three new Leica R lenses in quick succession, Leica Camera AG substantiates its dedication to the high-grade single lens reflex system. In addition to the recently introduced 15 mm f/2.8 LEICA ELMARIT-R ASPH. and the 21-35 mm f/3.4-4 LEICA VARIO-ELMAR-R ASPH. lenses, Leica presented the new 90 mm f/2 LEICA APO-SUMMICRON ASPH. lens at Photokina. “To me, photography is only complete with the Leica R System,” stated Hanns-Peter Cohn, CEO of Leica Camera AG. “To work with the LEICA R9 means to explore anew the fascinating world of Leica R lenses. From macro shots to telephoto photography. From brilliant slides to superb exhibition prints”, added Cohn.

In conceiving the LEICA R9, the Solms camera designers followed the objective of providing photographers with the greatest possible creative freedom. In this context, the core philosophy was to concentrate on what is significant. “The LEICA R9 does not incorporate everything that is technically possible, but everything that makes sense – in Leica quality”, stated Stefan Daniel. With the LEICA R9, the photographer has all the photographic parameters under his or her control without being ‘patronized’ by features and functions. The uniquely bright viewfinder serves for positioning the plane of sharpness, controlling the depth of field and the cropping. Clearly readable and logically arranged control elements for shutter speeds and aperture are positioned where one would intuitively expect them to be. In conjunction with the world-renowned Leica high-performance lenses, the LEICA R9 offers “the photographic flexibility and freedom for the best 35 mm photographs in the world”, as Stefan Daniel describes it.

Every single LEICA R9 is a tool that is manufactured with meticulous manual craftsmanship. As a product ‘Made in Germany’, it stands for quality, precision and sturdiness. It embodies high technology – for instance through modern materials, sensible electronics and precise fabrication methods, which are the essence of dependable and value-retaining products. The decades-old concept of system compatibility also contributes to this distinguished image – virtually all Leica R lenses made since 1965 can be used on the LEICA R9.

Weight reduction by means of light metals. Weighing only 790 grams (less than 28 ounces), the LEICA R9 is 100 grams (more than 3 1/2 ounces) lighter than the LEICA R8. The lion’s share of the weight reduction was achieved by paring 70 grams (2 1/2 ounces) from the weight of the top cover. The magnesium top cover now weighs only 40 grams (less than 1 1/2 ounces), which is only about one third of the weight of the previous top cover, which was made of die-cast zinc. The rigidity of the new top cover is identical to that of the previous cover. Magnesium, the same material used for Formula 1 engines, was ideally suited for this weight reduction. The high Leica standards of longevity, however, required a research project in which Leica explored new technological domains.

Magnesium is particularly difficult to manage with respect to corrosion resistance and scuffing. Leica for the first time employs a plasma-chemical process for coating the light metal. This transforms the surface of the magnesium into a thin ceramic layer. In this process, special demands are placed on the magnesium alloy and on the preparation of the surface. Special lacquers are then applied to achieve an extraordinarily long-lasting finish. A greater fabrication effort is also required for casting the magnesium in the molds, because this takes place at temperatures of 700° C (1292° F) as compared to 400° C (752° F) in the die-casting process.

A reduction of another 30 grams (just over 1 ounce) was achieved mostly by using aluminum for the baseplate. The tripod socket, however, continues to be made of steel. This combination of steel and aluminum is particularly sturdy and it has the additional benefit of a slight dampening of vibrations when the LEICA R9 is used on a tripod.

As a result, the LEICA R9 now has the “ideal weight”, as Stefan Daniel describes it. “The camera is easier to transport and it continues to form a well-balanced unit with all the lenses, so that it can be hand-held very steadily in the great majority of situations.” The lower position of the center of gravity of the LEICA R9 leads to a particularly well-balanced fit in the hand. Elaborate design work achieved a solidity that makes the LEICA R9 optimally suited for extreme applications and many decades of good use.

Enhanced overview. A new, additional exposure counter was integrated into the top cover. It becomes active as soon as the camera is switched on. The counter is more legible in this location. Another new feature is the illumination of the back cover display, which facilitates making the settings, for instance when making time exposures in the dark. Even when the DX code reading is activated, this display always indicates the film speed.

Increased certainty. Because the operating mode selector dial now locks securely in the selected position, the new LEICA R9 provides increased certainty when it is being used in a hurry or in fast-moving action. The locking feature effectively prevents inadvertent changes of the selected setting of the operating mode. The scuff guards have also been optimized in such a way that the carrying strap will not rub the top plate. The highest dependability of the LEICA R9 is assured right from the start, because it benefited from all the improvements made during the life cycle of the LEICA R8. For that reason, Leica Camera AG has increased the warranty period of the LEICA R9 to three years.

Exposures with improved multi-pattern metering. A sensible exposure metering system with three specific metering methods on the LEICA R9 enables photographers to react appropriately to different light situations.

In multi-pattern exposure metering, prevailing light conditions are analyzed automatically and separately in six different areas. The resulting values are compared with pre-programmed types of subjects, from which an optimal exposure for the photograph is derived.

Another new feature of the LEICA R9 is the possibility of tailoring the multi-pattern metering to individual types of film in steps of tenths of an f-stop in the range of ±0.7 aperture stops. For example, with this feature, slide films can be exposed more sparingly and negative films more generously. In combination with Leica R lenses, which have a built-in ROM module that informs the camera of the aperture values measured individually for each separate lens, this achieves a unique precision and uniformity of exposure results. This is a decisive advantage for photographers who place the highest importance on accurate exposures, for instance for transparencies to be used in slide presentations.

Selective metering on the LEICA R9 covers a very small measuring field. It is used when backlit situations or extreme contrasts become a real challenge for the photographer. The metered value can be stored by gently pressing the shutter release button to the first pressure point long enough until the desired cropping has been selected.

Integral metering is used for scenes with balanced lighting. The complete picture area is measured with center-weighted metering, which is particularly suitable for subjects with a central point of interest. With this metering mode, the measured value can also be stored. This metering mode can be applied universally, but it is also ideally suited for judicious under- and over-exposures by activating the override switch without having to move the eye away from the viewfinder.

Operating modes. With its four operating modes that can be combined freely with the three metering modes, the LEICA R9 offers the flexibility that a versatile photographer requires for his or her photographic projects.

The variable program automatic exposure control mode P independently takes care of the correct exposure when the subject requires a fast reaction, or when the photographer wants to concentrate fully on the composition of the picture. Multi-pattern metering makes it possible to work very conveniently. In the neutral position P of the shutter speed dial, the subject is assigned a programmed combination of aperture and shutter speed based on the metered exposure value. When fast-moving subjects require a faster shutter speed, an appropriate combination of shutter speed and aperture can be obtained by turning the shutter speed dial to the desired speed. Of course this also applies to longer exposure times, for instance for deliberate motion blur in dynamic picture compositions.

In the shutter speed priority automatic exposure control mode T, numerous creative possibilities can be explored by selecting the appropriate shutter speed. This mode is particularly useful in sports photography. Fast-moving subjects can be frozen, the depth of field can be reduced deliberately. The camera automatically sets the correct aperture.

The aperture priority automatic exposure control A, the emphasis is on the creative use of the depth of field. The photographer manually selects the aperture and the camera determines the appropriate shutter speed.

In the manual operating mode m, all the parameters are controlled by the photographer. Especially in difficult light conditions, the photographer can select an f-stop with the aperture ring of the lens and a shutter speed with the shutter speed dial on the camera. A light balance in the viewfinder provides the necessary information for fine-tuning the exposure.

Improved flash operation. The expanded possibilities for photography with flash provide the photographer with greater creative latitude. With the new High Speed Synchronization (HSS), flash synchronization is possible with shutter speeds up to 1/8000 second. Even though the metal blade shutter is never completely open, uniform illumination of the entire frame is achieved by means of an extremely fast succession of several flashes. HSS flashing can also be used as fill-in flash on subjects in daylight. This process, also known as linear flash, is particularly advantageous for brightening portrait subjects out in the open. A wide open aperture – which leads to a beautiful sharpness-unsharpness transition – usually requires very fast shutter speeds, so that conventional flash synchronization speeds normally required for fill-in illumination are not applicable. The exposure is determined by means of a pre-flash with selective exposure metering of the main subject. HSS flashing is possible only in conjunction with the Metz Mecablitz 54 MZ-3 flash unit in combination with an SCA 3502 M3 adapter.

Because of improved control, the LEICA R9 also produces a more uniform exposure with flash photography in the variable program automatic exposure control mode. Ambient light is now taken into account more actively than before. Especially in twilight situations, a larger aperture and longer exposure times combined with flash can yield pictorial results with impressive moods.

In the flash exposure mode F, the LEICA R8 and the LEICA R9 share the unique capability of flash exposure metering before the actual exposure is made. In this case, the flash is metered in the selective mode. The result can be read in the over- and under-exposure indicator in the back cover display and it can be adjusted quickly by setting the aperture manually. This makes it possible to tailor the flash illumination very deliberately to suit decisive details of the subject.

The first quantities of the LEICA R9 will be available at photo dealers beginning in Oktober 2002. The new camera will be available with black or anthracite lacquer finish.

Manufacturer description #2

The LEICA R9 is the core of a superbly refined camera system. When you work with film, the camera can be customized by selecting one of a number of different film advance devices: the extremely compact and quiet manual film advance, or the inconspicuous LEICA MOTOR-WINDER R9, or the professional LEICA MOTOR-DRIVE R9. You even have a choice of colors for your camera: discreet black or elegant anthracite.

Accurate exposure metering and control are prerequisites for successful photographs. The LEICA R9 features selective, integral as well as sophisticated multi-pattern exposure metering whose level can be changed at any time by tenths of a step. The result: optimal harmonization with the various types of films. Metered value storage can be used with selective and integral metering. The selected shutter speed and aperture combination is automatically stored when the shutter release button is pressed to the second pressure point. The various exposure modes enhance flexibility, quickness and not least, your creative freedom.

Thanks to its R bayonet, the LEICA R9 is compatible with virtually all R lenses made since 1965. All current Leica R lenses are equipped with an ROM module, which establishes specific communication between camera and lens, leading to perfect exposures.

With the high-eyepoint viewfinder you no longer need to press your eye against the eyecup in order to see the image clearly all the way into its corners. And all the important parameters are displayed optimally in the viewfinder: Shutter speed, aperture, operating mode, exposure metering mode and the exposure counter. An important feature for time exposures: An integrated shutter prevents light from reaching the film through the eyepiece. Eyeglass wearers will be especially pleased with the diopter compensation range from –2 to +2 in half steps, enabling the photographer to focus and expose with or without using the eyeglasses.

The LEICA DIGITAL-MODUL-R can be attached to the LEICA R9 with a simple hand motion, thus transforming it into a full-function digital SLR camera. During the development phase, special attention was paid to optimal image quality. You simply decide whether analog or digital photography is best for the application. No need for you to change your way of shooting: meaning that the proven simple and logical operating concept that is so typical of Leica, is retained in the LEICA DIGITAL-MODUL-R camera and digital back neatly merge into a single unit.

All operating elements of the LEICA R9 are positioned very conveniently and can be operated intuitively, without moving the eye away from the viewfinder. The rugged metal body fits very nicely in your hands and it has ideal weight. Small details – important effects: The operating mode selector dial can now be locked in place to prevent unintended changes of your selected settings that may occur, for instance, in the carrying case. The eyecup too, can be locked in place, so that it won’t get lost.

The LEICA R9 provides you with three exposure options for flash photography. In addition to the fully automatic P mode and the selective flash mode F, it also features High Speed Synchronization (HSS). In combination with an HSS flash unit, it allows flash exposures with shutter speeds as high as 1/8000 second! This enables you to make pleasing portraits even in daylight and at full aperture, without harsh contrasts.

From the editor

An improved version of the R8 with a similar specification.

Compared to the R8, the weight was reduced by 100g mainly by making the top cover from magnesium alloy instead of die-cast zinc, and also by using aluminium for the base plate.

In late 2004 the Leica DIGITAL-MODUL-R became available to convert the R8 into a high performance digital camera.

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Chromatic aberration

There are two kinds of chromatic aberration: longitudinal and lateral. Longitudinal chromatic aberration is a variation in location of the image plane with changes in wave lengths. It produces the image point surrounded by different colors which result in a blurred image in black-and-white pictures. Lateral chromatic aberration is a variation in image size or magnification with wave length. This aberration does not appear at axial image points but toward the surrounding area, proportional to the distance from the center of the image field. Stopping down the lens has only a limited effect on these aberrations.

Spherical aberration

Spherical aberration is caused because the lens is round and the film or image sensor is flat. Light entering the edge of the lens is more severely refracted than light entering the center of the lens. This results in a blurred image, and also causes flare (non-image forming internal reflections). Stopping down the lens minimizes spherical aberration and flare, but introduces diffraction.

Astigmatism

Astigmatism in a lens causes a point in the subject to be reproduced as a line in the image. The effect becomes worse towards the corner of the image. Stopping down the lens has very little effect.

Coma

Coma in a lens causes a circular shape in the subject to be reproduced as an oval shape in the image. Stopping down the lens has almost no effect.

Curvature of field

Curvature of field is the inability of a lens to produce a flat image of a flat subject. The image is formed instead on a curved surface. If the center of the image is in focus, the edges are out of focus and vice versa. Stopping down the lens has a limited effect.

Distortion

Distortion is the inability of a lens to capture lines as straight across the entire image area. Barrel distortion causes straight lines at the edges of the frame to bow toward the center of the image, producing a barrel shape. Pincushion distortion causes straight lines at the edges of the frame to curve in toward the lens axis. Distortion, whether barrel or pincushion type, is caused by differences in magnification; stopping down the lens has no effect at all.

The term "distortion" is also sometimes used instead of the term "aberration". In this case, other types of optical aberrations may also be meant, not necessarily geometric distortion.

Diffraction

Classically, light is thought of as always traveling in straight lines, but in reality, light waves tend to bend around nearby barriers, spreading out in the process. This phenomenon is known as diffraction and occurs when a light wave passes by a corner or through an opening. Diffraction plays a paramount role in limiting the resolving power of any lens.

Doublet

Doublet is a lens design comprised of two elements grouped together. Sometimes the two elements are cemented together, and other times they are separated by an air gap. Examples of this type of lens include achromatic close-up lenses.

Dynamic range

Dynamic range is the maximum range of tones, from darkest shadows to brightest highlights, that can be produced by a device or perceived in an image. Also called tonal range.

Resolving power

Resolving power is the ability of a lens, photographic emulsion or imaging sensor to distinguish fine detail. Resolving power is expressed in terms of lines per millimeter that are distinctly recorded in the final image.

Vignetting

Vignetting is the darkening of the corners of an image relative to the center of the image. There are three types of vignetting: optical, mechanical, and natural vignetting.

Optical vignetting is caused by the physical dimensions of a multi-element lens. Rear elements are shaded by elements in front of them, which reduces the effective lens opening for off-axis incident light. The result is a gradual decrease of the light intensity towards the image periphery. Optical vignetting is sensitive to the aperture and can be completely cured by stopping down the lens. Two or three stops are usually sufficient.

Mechanical vignetting occurs when light beams are partially blocked by external objects such as thick or stacked filters, secondary lenses, and improper lens hoods.

Natural vignetting (also known as natural illumination falloff) is not due to the blocking of light rays. The falloff is approximated by the "cosine fourth" law of illumination falloff. Wide-angle rangefinder designs are particularly prone to natural vignetting. Stopping down the lens cannot cure it.

Flare

Bright shapes or lack of contrast caused when light is scattered by the surface of the lens or reflected off the interior surfaces of the lens barrel. This is most often seen when the lens is pointed toward the sun or another bright light source. Flare can be minimized by using anti-reflection coatings, light baffles, or a lens hood.

Ghosting

Glowing patches of light that appear in a photograph due to lens flare.

Retrofocus design

Design with negative lens group(s) positioned in front of the diaphragm and positive lens group(s) positioned at the rear of the diaphragm. This provides a short focal length with a long back focus or lens-to-film distance, allowing for movement of the reflex mirror in SLR cameras. Sometimes called an inverted telephoto lens.

Anastigmat

A photographic lens completely corrected for the three main optical aberrations: spherical aberration, coma, and astigmatism.

By the mid-20th century, the vast majority of lenses were close to being anastigmatic, so most manufacturers stopped including this characteristic in lens names and/or descriptions and focused on advertising other features (anti-reflection coating, for example).

Rectilinear design

Design that does not introduce significant distortion, especially ultra-wide angle lenses that preserve straight lines and do not curve them (unlike a fisheye lens, for instance).

Focus shift

A change in the position of the plane of optimal focus, generally due to a change in focal length when using a zoom lens, and in some lenses, with a change in aperture.

Transmittance

The amount of light that passes through a lens without being either absorbed by the glass or being reflected by glass/air surfaces.

Modulation Transfer Function (MTF)

When optical designers attempt to compare the performance of optical systems, a commonly used measure is the modulation transfer function (MTF).

The components of MTF are:

The MTF of a lens is a measurement of its ability to transfer contrast at a particular resolution from the object to the image. In other words, MTF is a way to incorporate resolution and contrast into a single specification.

Knowing the MTF curves of each photographic lens and camera sensor within a system allows a designer to make the appropriate selection when optimizing for a particular resolution.

Veiling glare

Lens flare that causes loss of contrast over part or all of the image.

Anti-reflection coating

When light enters or exits an uncoated lens approximately 5% of the light is reflected back at each lens-air boundary due to the difference in refractive index. This reflected light causes flare and ghosting, which results in deterioration of image quality. To counter this, a vapor-deposited coating that reduces light reflection is applied to the lens surface. Early coatings consisted of a single thin film with the correct refractive index differences to cancel out reflections. Multi-layer coatings, introduced in the early 1970s, are made up of several such films.

Benefits of anti-reflection coating:

Circular fisheye

Produces a 180° angle of view in all directions (horizontal, vertical and diagonal).

The image circle of the lens is inscribed in the image frame.

Diagonal (full-frame) fisheye

Covers the entire image frame. For this reason diagonal fisheye lenses are often called full-frame fisheyes.

Extension ring

Extension rings can be used singly or in combination to vary the reproduction ratio of lenses. They are mounted between the camera body and the lens. As a rule, the effect becomes stronger the shorter the focal length of the lens in use, and the longer the focal length of the extension ring.

View camera

A large-format camera with a ground-glass viewfinder at the image plane for viewing and focusing. The photographer must stick his head under a cloth hood in order to see the image projected on the ground glass. Because of their 4x5-inch (or larger) negatives, these cameras can produce extremely high-quality results. View cameras also usually support movements.

135 cartridge-loaded film

43.27 24 36
  • Introduced: 1934
  • Frame size: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm
  • Area: 864mm2
  • Double perforated
  • 8 perforations per frame

120 roll film

71.22 44 56
  • Introduced: 1901
  • Frame size: 56 × 44mm
  • Aspect ratio: 11:14
  • Diagonal: 71.22mm
  • Area: 2464mm2
  • Unperforated

120 roll film

79.2 56 56
  • Introduced: 1901
  • Frame size: 56 × 56mm
  • Aspect ratio: 1:1
  • Diagonal: 79.2mm
  • Area: 3136mm2
  • Unperforated

120 roll film

89.64 56 70
  • Introduced: 1901
  • Frame size: 70 × 56mm
  • Aspect ratio: 5:4
  • Diagonal: 89.64mm
  • Area: 3920mm2
  • Unperforated

220 roll film

71.22 44 56
  • Introduced: 1965
  • Frame size: 56 × 44mm
  • Aspect ratio: 11:14
  • Diagonal: 71.22mm
  • Area: 2464mm2
  • Unperforated
  • Double the length of 120 roll film

220 roll film

79.2 56 56
  • Introduced: 1965
  • Frame size: 56 × 56mm
  • Aspect ratio: 1:1
  • Diagonal: 79.2mm
  • Area: 3136mm2
  • Unperforated
  • Double the length of 120 roll film

220 roll film

89.64 56 70
  • Introduced: 1965
  • Frame size: 70 × 56mm
  • Aspect ratio: 5:4
  • Diagonal: 89.64mm
  • Area: 3920mm2
  • Unperforated
  • Double the length of 120 roll film

Shutter speed ring with "F" setting

The "F" setting disengages the leaf shutter and is set when using only the focal plane shutter in the camera body.

Catch for disengaging cross-coupling

The shutter and diaphragm settings are cross-coupled so that the diaphragm opens to a corresponding degree when faster shutter speeds are selected. The cross-coupling can be disengaged at the press of a catch.

Cross-coupling button

With the cross-coupling button depressed speed/aperture combinations can be altered without changing the Exposure Value setting.

M & X sync

The shutter is fully synchronized for M- and X-settings so that you can work with flash at all shutter speeds.

In M-sync, the shutter closes the flash-firing circuit slightly before it is fully open to catch the flash at maximum intensity. The M-setting is used for Class M flash bulbs.

In X-sync, the flash takes place when the shutter is fully opened. The X-setting is used for electronic flash.

X sync

The shutter is fully synchronized for X-setting so that you can work with flash at all shutter speeds.

In X-sync, the flash takes place when the shutter is fully opened. The X-setting is used for electronic flash.

14103

Replacement camera body cover, plastic, for all LEICA R-mount cameras.

Unable to follow the link

You are already on the page dedicated to this lens.

Cannot perform comparison

Cannot compare the lens to itself.

Image stabilizer

A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.

The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.

Original name

Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.

Format

Format refers to the shape and size of film or image sensor.

35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.

APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.

Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).

Angle of view

Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.

As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.

A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).

This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),

where:

CF – crop-factor of a sensor,
FL – focal length of a lens.

Mount

A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.

Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance can also be different.

The flange focal distance (FFD) is the distance from the mechanical rear end surface of the lens mount to the focal plane.

Lens construction

Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.

Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.

Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.

Focal length

The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.

Speed

The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.

In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.

Closest focusing distance

The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.

Closest working distance

The distance from the front edge of the lens to the subject at the maximum magnification.

Magnification ratio

Determines how large the subject will appear in the final image. Magnification is expressed as a ratio. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.

Manual diaphragm

The diaphragm must be stopped down manually by rotating the detent aperture ring.

Preset diaphragm

The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.

Semi-automatic diaphragm

The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.

Automatic diaphragm

The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Fixed diaphragm

The aperture setting is fixed at F/ on this lens, and cannot be adjusted.

Number of blades

As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.

Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.

At maximum aperture, the opening will be circular regardless of the number of blades.

Weight

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

Maximum diameter x Length

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

For lenses with collapsible design, the length is indicated for the working (retracted) state.

Weather sealing

A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.

Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.

Fluorine coating

Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.

Filters

Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.

Lens hood

A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.

The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.

Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.

Teleconverters

Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.

Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.

Lens caps

Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.