Nikon AF-S NIKKOR 300mm F/4D IF-ED

Super telephoto prime lens • Film era

Abbreviations

AF-S The lens is equipped with Silent Wave Motor.
D The lens relays subject-to-camera distance information to the camera.
IF Internal focusing.
ED The lens incorporates low dispersion elements.

Sample photos

F/4.5
F/4.5
F/4.5

Model history (7)

Nikon NIKKOR 300mm F/4.5 EDA6 - 44.00m⌀72 1977 
Nikon AI NIKKOR 300mm F/4.5 EDA6 - 44.00m⌀72 1977 
Nikon AI NIKKOR 300mm F/4.5 IF-EDA7 - 62.50m⌀72 1978 
Nikon AI-S NIKKOR 300mm F/4.5 IF-EDA7 - 62.50m⌀72 1981 
Nikon AF NIKKOR 300mm F/4 IF-EDA8 - 62.50m⌀82 1987 
Nikon AF-S NIKKOR 300mm F/4D IF-EDA10 - 61.45m⌀77 2000 
Nikon AF-S NIKKOR 300mm F/4E PF ED VRA16 - 101.40m⌀77 2015 

Features highlight

2
ED
IF
CFD 1.45m
SWM
MFO
Focus limiter
9 blades
⌀77
filters
Built-in hood
TC

Specification

Production details:
Announced:August 2000
Production status: In production
Original name:Nikon AF-S NIKKOR 300mm 1:4D ED
System:Nikon F (1959)
Optical design:
Focal length:300mm
Speed:F/4
Maximum format:35mm full frame
Mount and Flange focal distance:Nikon F [46.5mm]
Diagonal angle of view:8.2°
Lens construction:10 elements in 6 groups
2 ED
Internal focusing (IF)
On Nikon D APS-C [1.53x] cameras:
35mm equivalent focal length:459mm (in terms of field of view)
35mm equivalent speed:F/6.1 (in terms of depth of field)
Diagonal angle of view:5.4°
Diaphragm mechanism:
Diaphragm type:Automatic
Aperture control:Aperture ring (Manual settings + Auto Exposure setting)
Number of blades:9 (nine)
Focusing:
Closest focusing distance:1.45m
Magnification ratio:1:3.65 at the closest focusing distance
Focusing modes:Autofocus, manual focus
Autofocus motor:Silent Wave Motor
Manual focus control:Focusing ring
Focus mode selector:M/A - M
Manual focus override in autofocus mode:Yes
Focusing distance range limiter:FULL;3-
Vibration Reduction (VR):
Built-in VR:-
Physical characteristics:
Weight:1300g
Maximum diameter x Length:⌀90×222.5mm
Weather sealing:-
Fluorine coating:-
Accessories:
Filters:Screw-type 77mm
Lens hood:Built-in telescopic round
Teleconverters:Nikon AF-I Teleconverter TC-14E → 420mm F/5.6
Nikon AF-S Teleconverter TC-14E II → 420mm F/5.6
Nikon Teleconverter TC-14B → 420mm F/5.6
Nikon AF-S Teleconverter TC-17E II → 510mm F/6.8
Nikon AF-I Teleconverter TC-20E → 600mm F/8
Nikon AF-S Teleconverter TC-20E II → 600mm F/8
Nikon AF-S Teleconverter TC-20E III Aspherical → 600mm F/8
Nikon Teleconverter TC-300 → 600mm F/8
Nikon Teleconverter TC-301 → 600mm F/8
Source of data:
Manufacturer's technical data.

Manufacturer description #1

MELVILLE, N.Y., Aug. 28 /PRNewswire/ -- Nikon today announced its newest pro quality telephoto lens -- the AF-S Nikkor 300mm f/4D ED-IF. Ideal for a wide range of picture taking, from sports and action, to extraordinary tight-close-up portraits, to general landscape photography, this new compact telephoto lens combines Nikon's superior optical quality with the legendary Nikon Silent Wave Motor for fast, quiet, and accurate autofocus.

Nikon's Silent Wave Motor design provides maximum autofocus performance with speed and accuracy, together with Nikon's extensive high performance family of SLR models: D1 Pro Digital SLR, Pro 35mm F5, F100, N90, advanced N80, Pronea S, Pronea 6i and the newly released compact N65 SLR. Because this new lens features Nikon's legendary F lens mount, with triple claw bayonet, its manual focusing performance is compatible with the full range of Nikon SLR models, including those named above and every other Nikon SLR made since 1959. This interchangeable compatibility is an exclusive Nikon advantage and compliments Nikon's concept of Total Imaging System and System Integrity.

When used with Nikon's compatible Autofocus SLR models, this lens' advanced M/A mode allows instant switching from automatic to manual focusing, even during AF servo operation. This means that if a user needs to take over focusing, for any reason, the compatible Nikon will instantly respond. Also, manual focusing performance does not require battery power ... another Nikon advantage.

AF-S is Nikon's designation that the lens is built with Nikon's exclusive Silent Wave Motor (SWM). The new AF-S Nikkor 300mm f/4D ED-IF enjoys the superb performance of the SWM. Autofocus operation is virtually silent, but more importantly, it is supremely fast and accurate. Subjects will "pop" into focus, almost faster than one can realize it's happening. Some have said, "It happened so fast I could not even realize that it was focusing!"

This new AF-S 300mm f/4D ED-IF Nikkor, and every AF-S Nikkor are a superb choice for indoor and outdoor action photography. Superior Nikkor optical design compliments this lenses smooth mechanical construction. The optical design includes two major features: Extra Low Dispersion Optical Glass and Internal Focusing Optical Design. Extra Low Dispersion optical glass elements virtually eradicate secondary optical chromatic aberrations; such aberrations are typical in ordinary telephoto optics. The result is that in pictures made with this new lens, virtually the entire visual spectrum of color is focused on the same plane -- producing superior color detail and contrast throughout the lens' focusing range and aperture selection.

Optical coatings are a critical component of every lens' design, so Nikon applies its best to this new lens: Nikon Super Integrated Optical coating is applied to enhance the new lens' image quality for crisper color rendition and reduced flare and ghosting.

As conventional telephoto optics are focused, the lens extends and contracts; this changes the lens' size and balance. Internal Focusing design enables the lens to be both auto-focused and manually focused without changing the lens' size with a negligible change in balance. The result is precise handling throughout the focusing range, from infinity to as close as 4.8 feet; and focusing is fast, crisp and accurate. Close focusing to a mere 4.8 feet gives photographers the ability to make dramatic portraits.

Still more performance improvements are provided through the lens' 9-blade aperture. More blades than an ordinary lens, this addition produces a more rounded aperture. The result is more natural looking highlights and crisper details throughout the picture.

Nikon D-type design provides distance information to the camera's computer. This information is used to achieve more precise exposure control, both for flash and for ambient light metering. A detachable tripod mounting collar is provided, as is a built-in lens hood that minimizes stray light. The lens' exterior finish is textured to provide a superior grip. For added versatility, the lens is fully compatible with the Nikon TC-14E Teleconverter, increasing the focal length to 420mm with 35mm SLR cameras. Used with Nikon's Pro Digital D1 SLR, the teleconverter's magnification produces the effective coverage of a 630mm lens.

The new Nikon AF-S Nikkor 300mm f/4D ED-IF will be available beginning in October of 2000.

Manufacturer description #2

Offering an excellent balance between size, speed and image quality, the fast AF-S NIKKOR 300mm f/4D IF-ED produces great sharpness, making it an ideal super-telephoto lens for sports, wildlife or travel applications. If greater reach is needed, it’s fully compatible with all Nikon teleconverters. It even handles close-up shooting suprisingly well.

The AF-S NIKKOR 300mm f/4D IF-ED delivers exceptionally clear images from remarkeable distances. It’s fixed 300mm focal length lets you get closer to the excitement of a sporting event, the natural splendor of wildlife and the breathtaking details of a landscape. And because of its compact size and lightweight construction, it’s perfect for carrying around during a full day of shooting. Combine it with a Nikon teleconverter, and you can achieve up to an astounding 600mm of reach!

The AF-S NIKKOR 300mm f/4D IF-ED delivers the exceptional image quality and performance that has made NIKKOR lenses famous. Nikon’s Silent Wave Motor (SWM) enables ultra-fast, ultra-quiet autofocusing with seamless manual override. Extra-low Dispersion (ED) glass produces superior sharpness, contrast and color, even in challenging lighting situations. And the Internal Focusing (IF) design keeps the lens compact and lightweight.

From the editor

On paper this lens looks impressive as in addition to IF and ED glass the minimum focus distance is reduced to an incredibly short 1.5m, and it has the Silent Wave motor technology to drive the AF from within the lens. Optically it is superb and produces images of the highest quality from corner to corner, and the AF action is fast and positive. Sadly this lens has a major flaw: its tripod collar. Used in the critical range of shutter speeds between 1/30 sec and 1/2 sec, when the effect of camera vibration is most likely to manifest itself, many photographers found the collar and foot to be insufficiently rigid to guarantee sharpness. Although unconfirmed by Nikon it appears the collar underwent a re-design around mid-2001, and this seems to have addressed the issue of rigidity.

Lenses with similar focal length

Sorted by manufacturer name

Nikon F mount 4 lenses (2 third-party)
Nikon AF NIKKOR 300mm F/4 IF-ED ⌀82Pro 1987 Compare04
Nikon AF-S NIKKOR 300mm F/4E PF ED VR ⌀77Pro 2015 Compare60
Sigma 300mm F/4 APO Macro ZEN ⌀77Pro 1994 Compare13
Tokina AT-X AF 300mm F/4 ⌀77Pro 1995 Compare05
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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.

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.

Silent Wave Motor

Silent Wave Motor is available in variants with or without a gear system. Nikon never specifies which variant is used in a particular lens, however, in budget models, as a rule, gear-type Silent Wave Motor is used, without manual focus override in autofocus mode. This can be assumed by the presence of the A - M switch on the lens barrel, instead of M/A - M.

Focusing distance range limiter

The lens features focusing distance range limiter which allows to choose between the following focusing distance ranges:

FULLFull range of focusing distances.
3m - ∞Range of focusing distances suitable for shooting distant subjects.

By setting the suitable focusing distance range, the actual autofocusing time can be shorter.

M/A - M

M/AAutofocus mode that allows switching to manual focus with virtually no time lag - even during autofocus servo operation and regardless of autofocus mode in use.
MManual focus mode.

Aspherical elements

Aspherical elements (ASPH, XA, XGM) are used in wide-angle lenses for correction of distortion and in large-aperture lenses for correction of spherical aberration, astigmatism and coma, thus ensuring excellent sharpness and contrast even at fully open aperture. The effect of the aspherical element is determined by its position within the optical formula: the more the aspherical element moves away from the aperture stop, the more it influences distortion; close to the aperture stop it can be particularly used to correct spherical aberration. Aspherical element can substitute one or several regular spherical elements to achieve similar or better optical results, which allows to develop more compact and lightweight lenses.

Use of aspherical elements has its downsides: it leads to non-uniform rendering of out-of-focus highlights. This effect usually appears as "onion-like" texture of concentric rings or "wooly-like" texture and is caused by very slight defects in the surface of aspherical element. It is difficult to predict such effect, but usually it occurs when the highlights are small enough and far enough out of focus.

Low dispersion elements

Low dispersion elements (ED, LD, SD, UD etc) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. This type of glass exhibits low refractive index, low dispersion, and exceptional partial dispersion characteristics compared to standard optical glass. Two lenses made of low dispersion glass offer almost the same performance as one fluorite lens.

Low dispersion elements

Low dispersion elements (ED, LD, SD, UD etc) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. This type of glass exhibits low refractive index, low dispersion, and exceptional partial dispersion characteristics compared to standard optical glass. Two lenses made of low dispersion glass offer almost the same performance as one fluorite lens.

Canon's Super UD, Nikon's Super ED, Pentax' Super ED, Sigma's FLD ("F" Low Dispersion), Sony' Super ED and Tamron's XLD glasses are the highest level low dispersion glasses available with extremely high light transmission. These optical glasses have a performance equal to fluorite glass.

High-refraction low-dispersion elements

High-refraction low-dispersion elements (HLD) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

High Index, High Dispersion elements

High Index, High Dispersion elements (HID) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

Anomalous partial dispersion elements

Anomalous partial dispersion elements (AD) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

Fluorite elements

Synthetic fluorite elements (FL) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. Compared with optical glass, fluorite lenses have a considerably lower refraction index, low dispersion and extraordinary partial dispersion, and high transmission of infrared and ultraviolet light. They are also significantly lighter than optical glass.

According to Nikon, fluorite easily cracks and is sensitive to temperature changes that can adversely affect focusing by altering the lens' refractive index. To avoid this, Canon, as the manufacturer most widely using fluorite in its telephoto lenses, never uses fluorite in the front and rear lens elements, and the white coating is applied to the lens barrels to reflect light and prevent the lens from overheating.

Short-wavelength refractive elements

High and specialized-dispersion elements (SR) refract light with wavelengths shorter than that of blue to achieve highly precise chromatic aberration compensation. This technology also results in smaller and lighter lenses.

Blue Spectrum Refractive Optics

Organic Blue Spectrum Refractive Optics material (BR Optics) placed between convex and concave elements made from conventional optical glass provides more efficient correction of longitudinal chromatic aberrations in comparison with conventional technology.

Diffraction elements

Diffraction elements (DO, PF) cancel chromatic aberrations at various wavelengths. This technology results in smaller and lighter lenses in comparison with traditional designs with no compromise in image quality.

High refractive index elements

High refractive index elements (HR, HRI, XR etc) minimize field curvature and spherical aberration. High refractive index element can substitute one or several regular elements to achieve similar or better optical results, which allows to develop more compact and lightweight lenses.

Apodization element

Apodization element (APD) is in fact a radial gradient filter. It practically does not change the characteristics of light beam passing through its central part but absorbs the light at the periphery. It sort of softens the edges of the aperture making the transition from foreground to background zone very smooth and results in very attractive, natural looking and silky smooth bokeh.

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.

Fixed focus

There is no helicoid in this lens and everything is in focus from the closest focusing distance to infinity.

Internal focusing (IF)

Conventional lenses employ an all-group shifting system, in which all lens elements shift during focusing. The IF system, however, shifts only part of the optics during focusing. The advantages of the IF system are:

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/4 on this lens, and cannot be adjusted.

Automatic aperture control

For Programmed Auto or Shutter-priority Auto shooting, lock the lens aperture at its minimum value.

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.