Sony a9 III

35mm AF digital mirrorless camera

Specification

Production details:
Announced:November 2023
System: Sony E (2013)
Format:
Maximum format:35mm full frame
Imaging sensor:35.6 × 23.8mm CMOS sensor
Resolution:6000 × 4000 - 24 MP
Sensor-shift image stabilization:Yes
Mount and Flange focal distance:Sony E [18mm]
Shutter:
Type:Focal-plane
Model:Electronically controlled
Speeds:30 - 1/80000 + B
Exposure:
Exposure metering:Through-the-lens (TTL), open-aperture
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Physical characteristics:
Weight:617g
Dimensions:136.1x96.9x82.9mm

Manufacturer description

SAN DIEGO, Nov. 7, 2023 /PRNewswire/ -- Sony Electronics today introduced the Alpha 9 III camera equipped with the world's firsti full-frame global shutter image sensor.

The newly developed global shutter image sensor exposes and reads all pixels simultaneously, unlike a rolling shutter sensor that records images sequentially from the top row of pixels to the bottom. The impressive global shutter full-frame image sensor enables the camera to shoot at burst speeds up to 120 frames per second with no rolling shutter distortion or camera blackout. This innovative sensor is combined with Sony's most advanced AF (autofocus) system to date - boasting AI autofocus with up to 120 times AF/AE focus calculations per second. With the added ability to sync flash at all shooting speeds, the Alpha 9 III opens up a new world of possibilities for professional photographers to capture every decisive moment.

"The Alpha 9 III full-frame camera is a landmark achievement for the industry," says Yang Cheng, Vice President, Imaging Solutions, Sony Electronics. "Designed with the needs and demands of professional photographers in mind, every single update to this camera – from the sensor to even the size to the button layouts and menu functions – has been made to address specific input and feedback from our community. We have listened and are thrilled to bring the new capabilities of the Alpha 9 III to market---capabilities which allow photographers to capture things they've never been able to capture before." Cheng continued, "For professionals everywhere, they can achieve even more dynamic expressions when the Alpha 9 III is combined with our rich lineup of lenses, in particular with the new 300mm F2.8 G Master OSS – the world's lightestii large-aperture telephoto lens."

Features of the Alpha 9 III Full-Frame Camera

A New Dimension of Still Image Performance Created by the World's Firsti Global Shutter Image Sensor

The Alpha 9 III is equipped with the newly developed, world's first global shutter full frame stacked CMOS image sensor with approximately 24.6 effective megapixels and built-in memory. Combined with the latest image processing engine BIONZ XR®, the Alpha 9 III achieves blackout-free Continuous Shooting Speed with AF/AE tracking of up to approximately 120 fps. The Alpha 9 III is supplied with high-density focal plane phase detection AF. A designated AI processing unit uses Real-time Recognition AF to recognize a wide variety of subjects with high precision. By combining high-speed performance of up to 120 fps with highly accurate subject recognition performance, it is possible to easily photograph scenes and moments that cannot be seen with the naked eye. The AI processing unit in the Alpha 9 III supports movies as well as still photography with accurate subject form and movement recognition. The Real-time Recognition AF and Real-time Tracking provide a significant improvement in human eye recognition performance, allowing the camera to automatically recognize, track, and focus on the eyes of a specified subject. The Alpha 9 III is equipped with 8.0 stops of optical 5-axis in-body image stabilization, allowing for high-quality image rendering.

Shutter speed is freed from the limitations of conventional mechanical shutter image sensors and achieves a maximum shutter speed of 1/80,000 second (1/16,000 second during continuous shooting), making it possible to capture at high speed without any distortion. When a compatible Sony flash is attached, such as the HVL-F60RM2 and HVL-F46RM (sold separately), it is possible to synchronize the flash and take pictures at all shutter speeds up to 1/80,000 second. Previously, if the user released the shutter at a speed faster than the flash's synchronization speed, the amount of light would drop sharply, but with the full-speed flash synchronization function, it's now possible to photograph scenes that could not be easily captured with conventional technology. Also, when shooting stills or movies under LED lighting, the Hi Frequency Flicker function can significantly reduce high-frequency flicker problems by allowing the shutter speed to be finely adjusted to match the flicker frequency while viewing the monitor.

The Alpha 9 III features selectable release lag modes which allows the user to prioritize release lag or viewfinder/monitor display. The newly developed Pre-Capture function allows the camera to continuously record up to one second before the shutter is released, making it easy to capture moments that would otherwise be missed. When selected, the Continuous Shooting Speed Boost function allows for the user to change to a faster, preset speed set by the user at any time during shooting, and enhanced burst stamina ensures that important moments are reliably captured due to a large buffer memory and increased overall system speed allow up to approximately 390 Fine JPEG images to be captured in one continuous 30 fps burst.

Customizable focus areas have been expanded to include from XS to XL in addition to the previous S, M, and L sizes. The Preset Focus/Zoom function allows preset focus and zoom settings to be memorized in the camera for quick recall when needed. In addition to the existing custom white balance frame size, the user can now select other sizes as needed which allows for fine white balance adjustment after an image has been composed. The Alpha 9 III has upgraded features such as the latest AF algorithms to achieve high AF precision down to light levels as low as EV-5 in AF-S mode (ISO 100 equivalent, F2.0 lens), AF tracking for continuous shooting at F22 and a composite RAW shooting function that gives the ability to combine multiple consecutive images into a high-quality composite.

Advanced Video Performance Without Distortion

The global shutter image sensor provides distortion-free image expression for videos as well as still images. For example, the user can shoot images of nearby scenery from a fast-moving vehicle such as a car or fast-moving subjects with ease. This camera is the first in the Alpha™ series to be able to record 4K 120p high-frame-rate video without cropping, allowing the user to shoot at the angle of view intended. It is also possible to shoot high-resolution 4K 60p videos with 6K oversampling.

The Alpha 9 III has S-Cinetone™, a unique Sony feature which can create a cinematic look straight out of the camera without post-processing. S-Cinetone was created through the development of the VENICE high-end cinema camera and makes human skin tones and subjects stand out beautifully, creating natural highlights. The Alpha 9 III has the latest video performance including rich gradation performance and S-Log3, and when in Log shooting mode, it can reflect and display the user's favorite imported LUT (lookup table). The Alpha 9 III is compatible with the mobile app "Monitor & Control" for video creators.

Operability and Reliability for Professionals

Sony has listened to the voices of professional photographers and created operability and reliability that supports professional users. The shape of the grip is improved and ergonomically designed so that it can be easily held in the palm of the hand to avoid straining the user even when wearing a telephoto lens or using it for long periods of time.

The VG-C5 vertical grip (sold separately), provides the same operability and versatility as when shooting horizontally; the user can comfortably support long shooting sessions. The grip and shutter button area share the same design as the main body, allowing image capture without feeling uncomfortable, with the same operability as the camera. The Alpha 9 III is equipped with a 4-axis multi-angle LCD monitor that can be operated by touch, allowing for intuitive operation using the latest touch menu. The electronic viewfinder uses a 9.44 million-dot Quad XGA OLED and achieves high visibility with the same brightness as the Alpha 7R V and a magnification of approximately 0.90x. Also, a custom button is placed on the front of the camera, and the continuous shooting speed can be changed by operating the custom button assigned with Continuous Shooting Speed Boost with the finger holding the grip, allowing for highly immediate operations. It supports professional photographers when shooting in all environments.

High-Speed Workflow and Scalability to Support Immediate Delivery

New features for the Alpha 9 III include a playback image filter that allows the user to efficiently select a large number of images using high-speed continuous shooting, and a function menu that can be used even during image playback, strongly supporting professional workflows from shooting to delivery.

The "Playback Function Menu" can be assigned in advance, so the user can perform protection, smartphone transfer, File transfer protocol, etc. during image playback. The user can select images narrowed down with a playback filter and play them from the function menu, allowing for quick delivery of specific images. The camera has a dedicated microphone for voice memos on the back, and by positioning the built-in microphone near the user's mouth allows clear recording of audio even in noisy environments. The recorded audio data can be transferred via FTP along with the images. The camera allows the user to set up to 20 presets from the International Press Telecommunications Council (IPTC), an international consultative body in which news organizations from various countries participate.

The Alpha 9 III can transfer data up to twice as fast as the Alpha 9 II. 5 GHz communication offers maximum speed and stability for news and sports shooters who need to deliver immediately via FTP, as well as for studio environments. The Alpha 9 III allows stills and movies to be recorded to memory media in numerous ways including the two media slots that support CFexpress Type A cards as well as UHS-I and UHS-II SD cards.

It is compatible with the professional mobile application "Transfer & Tagging" which speeds up the image delivery workflow, and the application "Remote Camera Tool" which allows remote shooting of PCs using wired LAN. Also, Sony plans to support a new version of Camera Remote SDK, a software development kit that allows remote camera operation and changing shooting settings, in Spring 2024.

In addition, the Alpha 9 III is scheduled to support functional enhancements such as FTP operability, relay playback, and C2PA format support through a camera software update.

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Copyright © 2012-2024 Evgenii Artemov. All rights reserved. Translation and/or reproduction of website materials in any form, including the Internet, is prohibited without the express written permission of the website owner.

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.

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, Leica, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance (distance from the mechanical rear end surface of the lens mount to the focal plane) is also different.

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 lens element 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.