Canon EOS-1V

35mm AF film SLR camera


Production details:
Announced:March 2000
System: Canon EOS (1987)
Maximum format:35mm full frame
Film type:135 cartridge-loaded film
Mount and Flange focal distance:Canon EF [44mm]
Model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL), open-aperture
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Physical characteristics:

Manufacturer description #1

2 February, 2000


Canon has confirmed its position as the leading camera manufacturer with the launch of the EOS-1V – a camera that incorporates all Canon’s latest developments at the cutting edge of camera technology and replaces the market leading EOS-1N.

The EOS-1V is the world’s fastest SLR camera with a shooting speed of 10fps* in one shot AF mode and 9 fps in AI Servo mode. This speed is combined with both an improved high-speed focus tracking system and predictive autofocus.

The EOS-1V is Canon’s most durable and robust camera to date incorporating the popular, and now improved, 45-point area auto focus first introduced on the EOS 3, personal and custom functions, PC connectability and an exposure data management system.

All this technology comes in a camera body whose ergonomic grip, main layout and switch arrangements are based on its EOS predecessors, therefore removing the need for the majority of professionals who use Canon to learn yet another layout.

Recognising that computers are an integral part of many professional photographers’ lives, Canon has developed new software that enables the EOS-1V to be linked with a PC– EOS Link Software ES-E1, (separate release available). Supplied on CD-ROM with a dedicated cable that links the EOS-1V to the USB port of a computer.

In addition the EOS-1V and EOS Link Software, Canon have also extended its professional photographic system by introducing a Macro Ring Lite MR-14EX, and Macro lens EF100mmf/2.8, (separate release available).

High Speed Shooting

With the PB-E2 Power Drive Booster and the nickel metal hydride Battery Pack attached, the EOS-1V achieves an unrivalled high speed continuous shooting performance of 10 fps in one-shot mode and 9 fps in AI Servo AF mode (for subjects moving at up to 50 kph as close as 8m). Even without the Power Drive, the EOS-1V can shoot at 3.5 fps while still only emitting the same noise level as the EOS-1N.

This speed is achieved by employing a new Active Mirror Control system that reduces mirror bounce, resulting in a lower mirror blackout time of 87ms and at the same time reducing camera shake, which guarantees a clear sharp viewfinder image even when using the rapid continuous shooting mode.

Durable and reliable

Built using a magnesium alloy shell the EOS-1V is both light and strong, with rubber coating for firm grip. To give improved water and dust resistance all 72 major body parts are sealed with silicone rubber, the edges of the back cover are thoroughly finished and a new water-resistant rubber ring has been added to protect the lens mount.

The EOS-1V’s electronically controlled rotary magnet shutter has been designed to provide accurate, consistent and trouble free operation even after long use and severe shooting conditions. In tests, Canon has recorded over 150,000 shutter cycles. The unit performs with this accuracy at its maximum speed of 1/8,000 second and has a maximum flash sync speed of 1/250 second, with the possibility of also using high-speed sync (FP sync).

Improved Wide Area AF

The wide area focus system packs 45 focusing points into a 8x15mm zone that can be manually or automatically selected to meet the shooting needs of any situation.

Following feedback, Canon has introduced a system that enables photographers to record the most often used focusing point (Home Position) and revert back to it with a simple one-touch operation with custom function 18/1.

To clearly show which points have been selected for focus, the focus point display in the viewfinder has been made two stops brighter than on the EOS-3, while still keeping the same possibilities to change the way it flashes by setting Custom Function 10.

Automatic or Manual Selection of Focus Point

At its simplest level, in One shot AF mode, based on the subject information obtained by the Area AF focusing points, the optimum focusing point is selected automatically.

Alternatively, any one of the 45 points can be selected allowing optimal focus while maintaining composition.

By setting Custom Function 13 options 1, 2 or 3, the number of focusing points available during manual selection can be reduced from 45 to 11 or 9. This gives photographers greater control in high contrast conditions and when shooting fast moving subjects.

Area Extension

Using Custom Function 17 options 1 or 2, enables the EOS-1V to expand the number of focusing points around the actual point selected thus giving a wider AF field that makes tracking some types of movement easier, especially when using long lenses or photographing small subjects.


Up to 20 Custom Functions with 63 settings can be selected to match a wide variety of shooting styles. Most items are numbered in the same way as the EOS-1N. Selection can be performed on the camera itself or via the EOS Link Software.

In addition to the 20 Custom Functions, there are also three Custom Function Groups. Each group can contain one setting from each of the twenty separate Custom Functions. Once programmed, banks of custom functions can be activated at the touch of a button.

The EOS Link Software ES-E1 kit, that includes a cable link, has been developed solely for use with the EOS-1V to ensure fast, easy customisation and data transfer.

EOS-1V Memory allows the photographer to record and manage shooting data. Up to 25 items of shooting data, such as aperture value or shutter speed, can be recorded in the EOS-1V’s built-in memory. Using this function, the shooting data, downloaded via the cable link, can be viewed, edited and searched. Scanned images can be also be acquired as thumbnails and attached to the data for each shot.

EOS-1V Remote allows the photographer to set the film ID function, initiate downloading of the shooting data and further customise the EOS-1V. Up to 30 Personal Functions (P.Fn’s) can be set using this software and then transferred via the cable link.

Metering and Exposure System

The EOS-1V incorporates the same metering system first introduced on the EOS-3, with an improved algorithm for even better performance. Metering methods compatible with the area AF system are: 21-zone evaluative metering linked to the focusing points, partial metering at the centre (8.5% of viewfinder screen), spot metering at centre (2.4% of viewfinder screen), spot metering linked to the focusing point, centreweighted and average metering, E-TTL Autoflash, A-TTL Autoflash and TTL Autoflash. Multi spot metering is possible for up to 8 points.

Shutter speed range is 30 sec to 1/8000 sec with a maximum sync speed of 1/250 sec. However, the flash can be synced up to 1/8000th of a second, using the FP flash mode.

Six exposure modes are provided for creative control; shutter speed priority, aperture priority, program AE, depth-of-field AE, manual exposure and bulb.

Viewfinder and LCD Panel

As well as the improved brightness of the focus points, the viewfinder gives 100% coverage with a magnification of 0.72x. A new digital frame counter, displays the same detail as shown on the LCD panel and an FP flash icon has been added below the image area. Eye relief is 20mm and dioptric correction –3 to +1. A built in eye piece shutter prevents stray light entering the camera during long exposures.

The LCD panel on the top cover of the camera displays the camera settings at a glance. For low light conditions a built-in illumination system enhances the display.

Basic operation is very similar to the EOS 1N – most operations can be performed without taking your eye off the viewfinder or your finger off the shutter button. The same camera control layout presents no familiarity problems for EOS-1N users.

The EOS-1V also features a newly developed infrared sensor which allows the use of infrared film.

Outstanding flash photography

The EOS-1V is fully compatible with Canon’s range of EX Speedlite flash units to give both creative power and control to photographers.

With the Speedlite 550EX an AF-assist beam is linked to the area AF providing optimum exposure in standard mode. This system also offers FEB, E-TTL wireless multiflash control and slave unit control. Flash coverage is set automatically from 24mm to 105mm, and a wide-angle panel extends the coverage to 17mm.

For E-TTL wireless (multi-flash) autoflash shots, an ST-E2 Speedlite Transmitter can be mounted on the camera’s hot shoe to control an unlimited number of Speedlites 550EX. The transmitter also has a built-in AF assist beam linked to the area AF.

The EOS-1V is available from April at an RRP of Ł1599.99 body only and Ł1799.99 for the EOS-1V HS Drive model.

* with Drive E2 and Ni-MH battery.


The Power Drive Booster PB-E2 has its own shutter button, AE lock button, FE lock/multi-spot metering button, Main Dial, focusing point selector and ON/OFF switch for the Power Drive Booster buttons.

A 12v nickel metal hydride Battery Pack, NP-E2, is dedicated for use with the EOS-1V and EOS-3 in combination with the PB-E2 Power Drive Booster. The NC-E2 charger/discharger dedicated to the NP-E2 battery pack will charge the battery pack in about 100 minutes.

Other existing accessories include:

Dateback DB-E2, a standard interchangeable camera back with Quick Control Dial and date imprinting function; Timer Remote Controller TC-80N3, with four built-in control functions: self-timer, interval timer, long-exposure timer and frame quantity setting; Remote Switch RS-80N3; Extension Cord ET-1000N3; Wireless Controller LC-4, which enables the camera to be controlled from up to 100meters; and Remote Switch Adapter RA-N3 ensuring backward compatibility with existing EOS-1N remote accessories.

Manufacturer description #2

The EOS 1 was introduced in 1989. In 1994 the AF speed and other features were improved with the EOS 1N. Now, the EOS 1V takes Canon's professional range of SLR's into the 21st century.

The EOS 1V combines the EOS 1N's outstanding reliability and the EOS 3's advanced features making it the world's top performance AF SLR camera.

No.1 AF Performance

The EOS 1V has a 45 point Area AF for better subject capture. Following consultations with many professional Canon users new focusing point selection methods have also been introduced including the ability to register the most frequently used focusing point and shift focusing to this point instantly. In addition to limiting the selectable focusing points to 11, a new custom function setting can also limit the number of points to 9. By limiting the selectable focusing points to 11 or 9 and expanding the focusing point range, all 45 focusing points can be used to cover the subject. This combination enables both quick focusing point selection and fast subject capture.

High Speed Continuous Shooting

The EOS 1V is the world's fastest 35mm AF SLR camera at 10 frames per second*. With the DRIVEE2 and Ni Mh battery pack the EOS 1V can be set to one of four film advance modes: Single frame, low speed, high speed and ultra high speed continuous advance. The EOS 1V is compatible with bottom attachable accessories for the EOS 1, EOS 1N and EOS 3.

* With DRIVEE2 and Ni Mh battery pack

Improved reliability to meet the demands of pros

All the switches and major body seams of the EOS 1V are sealed, and the camera back edges are lined with packing icluding the grip's battery chamber. Countermeasures against dust and water enable the EOS 1V to be used even in harsh environments. To better seal out dust and water, the lens mount perimeter also has a new coupling surface to make sure that no moisture or dust is able to enter the camera body. Important electrical contacts are bipolar to enhance reliability and operation is guaranteed between -20C to +45 C with 95% maximum humidity. The EOS 1V's durability is enhanced with the inclusion of a magnesium alloy shell around which the camera is constructed contributing outstanding strength to the body of the camera. The EOS 1V's shutter is based on the highly reliable rotary magnet-controlled shutter, using carbon curtains, an improved shutter cocking mechanism makes it possible for the EOS 1V to offer speed and performance with a maximum X sync of 1/250 sec and a durability of 150,000 cycles.

New improved functions

A number of excellent basic features guarantee that the EOS 1V will be the number one choice for the professional photographer in the new century. An advanced 21 zone evaluative metering system and a number of exposure control modes which the user is able to link to the active focusing point being used. An Ultra high speed and high precision shutter with a speed of 30 sec - 1/8000 sec and X sync at 1/250 sec means that the user is able to take a shot at the vital point. A 100% viewfinder, dioptric correction from -3 to +1 and built-in eye piece shutter. A Laser Matte focusing screen with Area AF ellipse. The EOS 1Vs viewfinder blackout time of 80ms is approximately 43% shorter than the EOS 1Ns and 24% shorter than the EOS 3's. The EOS 1V also has the facility to use infrared film and also enables Film ID imprinting to be enabled for easier identification and organization of film rolls. All of these improved functions combined with the EOS 1V's advanced features and durability highlight why the EOS 1V is the first choice professional SLR camera.

Computer linkup facility

When a picture is taken, the shooting data is automatically recorded in the EOS 1V's built in memory. The EOS Link Software allows the user to link the camera directly with a computer and retrieve shooting information that can then be viewed and edited. Thumbnail images can also be loaded via a film scanner and shooting data matched to the image to which it corresponds. Troublesome data management can be carried out quickly and simply. Looking at the personal computer screen, the user can customize the EOS 1V in detail just like a custom-made camera. Grouping settings, adapting the shooting mode to suit their style or even setting shutter speed limits means that the EOS Link Software is able to provide the ultimate customization for the EOS 1V user.

Range of EOS system accessories

The Canon EOS user has instant access to the wide range of Canon EF lenses including Canon's unique IS lenses with image stabilizing technology as well as an impressive range of system accessories which provide invaluable help with every possible shooting situation. The EOS 1V is the new figurehead in the next stage of the Canon EOS system and it is the EOS 1V by which all professional SLR cameras will now be judged.

Manufacturer description #3

The EOS-1V, successor to the EOS-1N, is a premier-class professional SLR featuring the latest state-of-the-art technology.

Premier AF Performance: The 45-point area AF gives predictive AI servo AF at about 9 fps (with the PB-E2 attached) for outstanding subject tracking and blazingly fast focusing, all automatically.

High-speed continuous shooting: 10 fps continuously (with the PB-E2 attached).

In response to the severe demands of professional photographers, already excellent reliability has been improved even further. Water and dust resistance is even better than the EOS-1N and EOS-3. Leading-edge “thixo-molding” metal injection molding technology has led to strong, rigid magnesium alloy outer covers that easily passed 150,000 operations test standards. While carrying over the standard specifications of the EOS-1: the advanced exposure metering system of the EOS-3 has been incorporated in this professional camera, along with the 1/8000 sec. high speed shutter that syncs with flash at 1/250 second.

The viewfinder specifications are carried over from the EOS-1N, and EOS-1N accessories are compatible.

Shooting data recording system: Shooting data for 100 rolls of 36 exp. film (using the standard settings) is stored in memory, and can be read and edited on a computer using the ES-E1 software. Customizing functions abound: 20 custom functions, and 31 personal functions.

Accessories marketed simultaneously with the EOS-1V include the EOS Link Software (ES-E1); and two items expanding macro system capabilities: the EF 100mm f/2.8 USM MACRO lens and the Macro Ring Lite MR-14EX.

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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 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 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 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.


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 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 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.


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.


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.


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.


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.

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 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),


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


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.


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.


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.


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 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.