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Tamron AF 18-270mm F/3.5-6.3 Di II VC LD Aspherical (IF) Macro B003

Superzoom lens • Digital era • Discontinued

DI II The lens is designed only for APS-C digital SLR cameras.
VC The lens is equipped with Vibration Compensation.
LD The lens incorporates low dispersion elements.
ASPHERICAL The lens incorporates aspherical elements.
(IF) The lens incorporates internal focusing.
MACRO A lens with better close-up focusing capabilities in comparison with traditional lenses. Not a macro lens though.

Model history

Tamron 18-270mm F/3.5-6.3 Di II VC PZD B008TSAPS-CA16 - 130.49mE62 Nov 2016
Tamron AF 18-270mm F/3.5-6.3 Di II VC PZD B008APS-CA16 - 130.49mE62 Dec 2010
Tamron AF 18-270mm F/3.5-6.3 Di II VC LD Aspherical (IF) Macro B003APS-CA18 - 130.49mE72 Jul 2008

Specification

Announced: July 2008
Production status: Discontinued
Maximum format: APS-C
Mount: Canon EF
Nikon F
Optical design
Diagonal angle of view: 74.1°-5.8° (Canon EF APS-C)
76.3°-6° (Nikon F APS-C)
Lens construction: 18 elements - 13 groups
3 ASPH, 2 LD, 1 AD
Diaphragm mechanism
Diaphragm control system: Mechanical (Nikon F)
Number of blades: 7
Zooming
Zooming method: Rotary
Additional features: Zoom lock
Focusing
Focusing method: Internal focusing (IF)
Closest focusing distance: 0.49m
Maximum magnification ratio: 1:3.5 @ 270mm at the closest focusing distance
Focusing modes: Autofocus, manual focus
Type of autofocus motor: Micromotor
Focus mode selector: AF/MF
Manual focus override in autofocus mode: None
Image stabilizer
Vibration Compensation (VC): Yes
Stabilizer features: Mode 1
Panning Detection
Stabilizer efficiency: up to 4 stops
Physical characteristics
Weight: 550g (Nikon F)
Maximum diameter x Length: Ø79.6×101mm (Nikon F)
Weather sealing: None
Fluorine coating: None
Accessories
Filters: Screw-in 72mm
Lens hood: Bayonet-type AB003 (petal-shaped)

Manufacturer description

ANNOUNCING THE TAMRON AF18-270MM Di II VC ULTRA HIGH POWER ZOOM LENS

A Technological Breakthrough-World's Longest Range 15X Zoom Lens Has Exclusive Built-In Vibration Compensation Mechanism Optimized For Consumer Digital SLR Cameras

September 1, 2008, Saitama City, Japan - Tamron Co., Ltd., under the leadership of Mr. Morio Ono, President, has unveiled a unique ultra high power zoom lens-the Tamron AF18-270mm F/3.5-6.3 Di II VC LD Aspherical (IF) MACRO (Model B003), the first digital SLR lens in the world that delivers a remarkable zoom ratio of 15X (28-419mm equivalent) and is equipped with a highly effective Vibration Compensation (VC) mechanism. Designed exclusively for digital SLR cameras with APS-C sized image sensors, the new lens delivers outstanding image quality over its entire zoom range and its exclusive VC anti-shake system facilitates sharp handheld photography even at the longest telephoto settings.

With its vast zoom-range, the Tamron AF18-270mm F/3.5-6.3 Di II VC lens enables the user to cover virtually any photographic subject from wide angle to ultra telephoto simply by turning the zoom control. It covers angles of view equivalent to 28mm to 419mm when converted to the 35mm format. In addition, this breakthrough lens is equipped with Tamron's exclusive, proprietary tri-axial Vibration Compensation (VC) mechanism that eliminates or substantially reduces the effects of handheld camera shake. As a result, the user can enjoy the convenience of handheld photography in virtually any situation, from shooting candid images, to covering sporting events, to news photography, without worrying about camera shake having an adverse effect on image quality. The new lens will be made available in Canon and Nikon mounts. The price and launch date of the new lens will be announced at a later date.

Note: Di (Digitally integrated) II lenses employ optical systems designed for exclusive use on digital SLR cameras equipped with smaller sized (APS-C sized) image sensors. Di II lenses are not designed for use with 35mm film cameras or digital SLR cameras with image sensors larger than 24mm x 16mm. (This special note "APS-C sized image sensors" is hereinafter omitted.)

DEVELOPMENT BACKGROUND

Since launching the Tamron AF28-200mm F/3.8-5.6 (Model 71D) in 1992 that was highly acclaimed as the first high power zoom lens suitable for practical use, Tamron has continued to develop innovative zoom lenses as the "pioneer in high power zoom lenses". With the AF18-200mm F/3.5-6.3 XI Di II (Model A14), Tamron realized an 11.1X zoom power for the first time in a zoom lens exclusively designed for digital SLR cameras and expanded the telephoto range further to 13.9X with the AF18-250mm F/3.5-6.3 Di II (Model A18), making steady progress in extending the range of high performance, high power zoom lenses.

Tamron's engineers faced the even more formidable challenge of finding solutions for the problem of "handheld camera shake" while expanding the telephoto range even further and have eventually developed the AF18-270mm F/3.5-6.3 Di II VC. This lens has attained the maximum zoom power of 15X for the first time in the world, namely as a zoom lens exclusively designed for digital SLR cameras. It enables the user to cover an extremely wide angle-of-view range equivalent to a 28mm-419mm lens in the 35mm format. In addition, the lens is equipped with Tamron's original and exclusive VC mechanism that effectively compensates for "handheld shake", which would otherwise become visible as un-sharpness or blur in images shot handheld. Moreover this system is effective over the extremely wide focal length range of this extended ultra telephoto lens and Tamron's VC mechanism provides maximum compensation performance at all focal lengths. The VC system enables the user to enjoy the full benefits of ultra-tele photography comfortably and provides amazingly stabilized viewfinder images as well. In short, this unique VC image stabilization system delivers the maximum potential built into the world's longest-ratio zoom lens-15X.

Tamron was able achieve all these remarkable accomplishments thanks to its advanced optical / mechanical design technologies and production know-how accumulated over 16 years as the pioneer in high power zoom lens design, and its commitment to ongoing research and development. Even more important, in combining an amazingly high zoom ratio along with the VC function Tamron has maintained a high priority on its traditional goals of lightness and compactness. As a result the new Tamron AF18-270mm Di II VC delivers all the functionality and performance you expect from the latest Tamron ultra high power zoom, a lens that exemplifies our time-honored concept of "One great lens covering everything from wide angle to telephoto".

MAIN FEATURES

World's first and greatest zoom ratio of 15X, covering 28-419mm 35mm-equivalent angle of view

Going back to the basic concept of "one lens covering everything from wide angle to telephoto," engineers at Tamron took up the difficult task of expanding the zoom range of Tamron's high power zoom lenses even further. Their unstinting efforts to extend the telephoto end beyond previous limits while retaining the wide-angle end at 18mm has borne fruit as an ultra high power zoom lens that is exclusively designed for DSLR cameras and boasts the greatest zoom range of 15X for the first time in the world.

Tamron's original VC mechanism for effective shake-free hand-held photography

Tamron's proprietary VC (Vibration Compensation) mechanism was built in the AF28-300mm F/3.5-6.3 Di VC (Model A20) for the first time. It demonstrated its powerful compensation effect employing a tri-axial system that is designed to let three coils drive a compensator lens electromagnetically via three steel balls. Since the compensator lens is supported on rolling steel balls with very low friction, follow-up performance is also enhanced, resulting in stabilized viewfinder images. Since the mechanism is designed to allow parallel shifting of the compensator lens solely by means of electrical control, the mechanical construction is simpler and more compact, so the lens can be kept as a small and light as possible.

Designing a high power, compact zoom lens with VC mechanism: Optical design optimization meets optimum power distribution

In developing the long-range zoom lens, Tamron's optical designers pursued the optimum distribution of power within the overall optical system based on the optical design know-how Tamron accumulated over 16 years since the introduction of the first compact AF28-200mm in 1992. The resulting optical system uses three hybrid aspherical elements, two LD (Low Dispersion) glass elements and an AD (Abnormal Dispersion) glass element in order to effectively compensate for various aberrations including astigmatism and chromatic aberration, yet this design allows the first optical group to be small enough in diameter to realize the overall goal of a compact lens that incorporates a handheld-shake compensation mechanism.

Note: In order to realize the high zoom ratio of 15X, the optical system does not use any XR (extra dispersion glass) element. Instead, compactness is achieved through optimization of the power distribution within the whole optical system.

Minimum focusing distance of 0.49m over the entire zoom range for the maximum magnification ratio of 1:3.5

The AF18-270mm Di II VC allows close focusing down to 0.49m (20 inches) from the subject over the entire zoom range even though it incorporates the VC mechanism. The maximum magnification ratio of 1:3.5 at its 270mm telephoto end is the top class capability among high power zoom lenses exclusively designed for digital SLR cameras.

* 3 A format covered by an APS-C sized image sensor is smaller than that of 35mm format film. Therefore, this lens is capable of filling the frame by capturing an area that is almost the same as an area covered by a lens designed for the 35mm format and providing the maximum magnification ratio of 1:2.3.

Optical system optimized for digital SLR cameras by taking incident rays of light reaching the image sensor into consideration

In order to effectively compensate for changes in aberrations due to zooming, the zoom lens employs an innovative optical system that is designed to converge the angles of rays of light entering from the center to the periphery of the lens. The light rays thus reach the image sensor within a defined circle that assures high imaging performance and reduces light falloff.

High resolution performance

As a lens exclusively designed for digital SLR cameras, this zoom lens delivers high resolution and contrast performance for outstanding image quality with sufficient flatness of the field under an extremely wide range of photographic conditions.

Thorough countermeasures, including advanced internal surface coatings, prevent ghosting and flare

Tamron employs multi-layer coatings in order to reduce reflections on lens surfaces as well as internal surface coatings (coatings on the cemented surfaces of lens elements) in order to minimize reflections from the sensor itself within the mirror box, a problem inherent to all digital SLR cameras.

The world's first and greatest zoom power of 15X plus built-in VC mechanism achieved along with a remarkably slim maximum diameter of less than 80mm

Designing a lens with the world's first and greatest zoom ratio of 15X inevitably entailed a larger travel distance of the components within the optical systems, but Tamron has successfully accommodated the optical system as well as the special VC mechanism in a remarkably compact and slim package by employing mechanical design technology accumulated over many years. The result: A slim design measuring less than 80mm in diameter despite the fact that it is an ultra high power zoom lens that incorporates a VC mechanism. Production engineering this unique zoom lens meant incorporating complex optical / mechanical components, and Tamron's engineers had to employ innovative manufacturing techniques including methods of further enhancing accuracy, reducing weight, and increasing the strength of many components.

Note: : In order to achieve the world's first and greatest zoom ratio of 15X, metal mounts are used in both Canon- and Nikon-mount lenses.

Zoom lock mechanism for convenience in carrying the outfit

The lens has a built-in zoom lock mechanism to prevent its barrel from sliding forward when the lens is being carried on the camera.

Flower-shaped lens hood as a standard accessory

The lens is supplied with a flower-shaped lens hood as a standard accessory. It is designed to efficiently cut harmful light entering at angles other than intended angles at all four corners of the frame. This ensures clear, flare-free images.

New outer design matches the newest generation high power zoom lens in the digital era

The lens employs a new outer design that is more refined and smoother in its overall contours by minimizing concavity, convexity, and variations in profile in order to match the latest digital SLR cameras.

A gold-colored metal ring is placed at a key portion of the lens as used in other Di II lenses. The "TAMRON" logo placed in the center portion of the lens enhances visibility of the brand while refining the overall design.

Delicate matte finish is added to the black painting over the lens barrel in order to enhance the high quality appearance of the lens.

The textured rubber pattern of the zoom and focus control rings has been improved again to a more pronounced, easy to grasp design than the conventional rubber pattern, for better feel and touch in manipulating the lens.

Typical application

landscapes, interiors, buildings, cityscapes, portraits, travel, wild nature

Sigma 18-250mm F/3.5-6.3 DC Macro OS HSM

Sigma 18-250mm F/3.5-6.3 DC Macro OS HSM

Sigma 18-250mm F/3.5-6.3 DC Macro OS HSM
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Sigma 18-250mm F/3.5-6.3 DC Macro OS HSM

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Sigma 18-250mm F/3.5-6.3 DC Macro OS HSM

Sigma 18-250mm F/3.5-6.3 DC OS HSM

Sigma 18-250mm F/3.5-6.3 DC OS HSM
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Sigma 18-250mm F/3.5-6.3 DC OS HSM

Sigma 18-250mm F/3.5-6.3 DC OS HSM
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Sigma 18-250mm F/3.5-6.3 DC OS HSM

Sigma 18-250mm F/3.5-6.3 DC OS HSM
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  • Disadvantages: 2

Sigma 18-250mm F/3.5-6.3 DC OS HSM

Sigma 18-250mm F/3.5-6.3 DC OS HSM
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Sigma 18-300mm F/3.5-6.3 DC Macro OS HSM | C

Sigma 18-300mm F/3.5-6.3 DC Macro OS HSM | C
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Sigma 18-300mm F/3.5-6.3 DC Macro OS HSM | C
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Sigma 18-300mm F/3.5-6.3 DC Macro OS HSM | C

Sigma 18-300mm F/3.5-6.3 DC Macro OS HSM | C
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Sigma 18-300mm F/3.5-6.3 DC Macro OS HSM | C

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Tamron 18-270mm F/3.5-6.3 Di II VC PZD B008TS

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Tamron AF 18-250mm F/3.5-6.3 Di II LD Aspherical (IF) Macro A18

Tamron AF 18-250mm F/3.5-6.3 Di II LD Aspherical (IF) Macro A18
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  • Disadvantages: 2

Tamron AF 18-250mm F/3.5-6.3 Di II LD Aspherical (IF) Macro A18

Tamron AF 18-250mm F/3.5-6.3 Di II LD Aspherical (IF) Macro A18
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Tamron AF 18-250mm F/3.5-6.3 Di II LD Aspherical (IF) Macro A18
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Tamron AF 18-270mm F/3.5-6.3 Di II VC PZD B008

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Tamron AF 18-270mm F/3.5-6.3 Di II VC PZD B008
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Alternatives (AF, 15-303mm)

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Aperture

The aperture stop is an important element in most optical designs. Its most obvious feature is that it limits the amount of light that can reach the image/film plane. Typically, a fast shutter will require a larger aperture to ensure sufficient light exposure, and a slow shutter will require a smaller aperture to avoid excessive exposure.

A device called a diaphragm usually serves as the aperture stop, and controls the aperture. The diaphragm functions much like the iris of the eye – it controls the effective diameter of the lens opening. Reducing the aperture size increases the depth of field, which describes the extent to which subject matter lying closer than or farther from the actual plane of focus appears to be in focus. In general, the smaller the aperture (the larger the number), the greater the distance from the plane of focus the subject matter may be while still appearing in focus.

The lens aperture is usually specified as an f-number, the ratio of focal length to effective aperture diameter. A lens typically has a set of marked "f-stops" that the f-number can be set to. A lower f-number denotes a greater aperture opening which allows more light to reach the film or image sensor.

The specifications for a given lens typically include the maximum and minimum aperture sizes, for example, f/1.4–f/22. In this case f/1.4 is the maximum aperture (the widest opening), and f/22 is the minimum aperture (the smallest opening). The maximum aperture opening tends to be of most interest, and is always included when describing a lens. This value is also known as the lens "speed", as it affects the exposure time. Lenses with apertures opening f/2.8 or wider are referred to as "fast" lenses. Zoom lenses typically have a maximum relative aperture (minimum f-number) of f/2.8 to f/6.3 through their range. High-end lenses will have a constant aperture, such as f/2.8 or f/4, which means that the relative aperture will stay the same throughout the zoom range. A more typical consumer zoom will have a variable maximum relative aperture, since it is harder and more expensive to keep the maximum relative aperture proportional to focal length at long focal lengths; f/3.5 to f/5.6 is an example of a common variable aperture range in a consumer zoom lens.

Autofocus motor

Micromotors and built-in motors of Nikon, Pentax and Sony digital SLR cameras provide moderately noisy and acceptably fast autofocus.

With ultrasonic, linear or stepping motor it is possible to achieve very fast and virtually silent autofocus. Moreover, the use of linear or stepping motor ensures smooth continuous focusing which makes lenses with such types of motors ideal for video recording.

The accuracy of autofocus does not depend on type of used autofocus motor but depends on focusing method (contrast or phase detection), autofocus algorithms, lighting conditions and other factors.

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.

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.

Focusing method

Photographic lenses carry out focusing using one of the following five methods:

Methods of internal and rear focusing have the following advantages:

Electromagnetic diaphragm control system

Provides highly accurate diaphragm control and stable auto exposure performance during continuous shooting.

AF/MF

AFAutofocus mode without manual focus override.
MFManual focus mode.

Screw-in lens hood

Fastens to the front thread of the lens barrel.

Slip-on lens hood

Attaches to the lens barrel behind the front rim. A knurled screw tightens a retaining ring, holding the hood firmly to the lens.

Bayonet-type lens hood

Attaches to the bayonet fitting on the front of the lens barrel and locks in place with a twist. After usage, the lens hood can be mounted in reverse for transportation or storage.

Snap-on lens hood

Attaches onto the front of the lens with a spring-type retainer ring. This type of lens hoods is the fastest to attach. After usage, the lens hood can be mounted in reverse for transportation or storage.

Filter access window

The lens hood features a slide-out window which enables rotation of polarizing filter without removing the lens hood.

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.

Low dispersion and fluorite elements

Low dispersion elements (AD, ED, LD, HLD, SD, UD etc) and fluorite elements minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

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 (BR Optics) material placed between convex and concave elements made from traditional optical glass provides more efficient correction of lateral chromatic aberrations in comparison with fluorite, UD and even Super UD elements.

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 (XR, UXR, HID, HR, HRI 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.

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.

Efficiency of Image Stabilizer

The efficiency of image stabilizer is measured in stops and each stop corresponds to a two-times increase of shutter speed. For example, if you are shooting at focal length of 80mm and it is known that the efficiency of image stabilizer is 3 stops, it means that during handheld shooting at such focal length you can use shutter speed of 1/10 second which is exactly 23 times longer than the shutter speed 1/80 second needed to obtain sharp image in sufficient lighting conditions.

Zooming method

The rotary zooming method means that the change of the focal length is achieved by turning the zoom ring and the manual focusing - by turning the separate focusing ring.

The push/pull zooming method means that the change of focal length and the manual focusing is achieved by one and the same ring. The change of focal length happens when the photographer moves the ring towards the mount or backwards and the rotation of the ring leads to change of focus.

Push/pull zooming allows for faster change of focal length, however conventional method based on the rotation of the zoom ring provides more accurate and smooth zooming.

Zoom lock

The lens features a zoom lock to keep the zoom ring fixed. This function is convenient for carrying a camera with the lens on a strap because it prevents the lens from extending.

Power Zoom

The lens features electronically driven zoom mechanism. It provides smoother, more natural zoom movements than you could accomplish by hand.

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.

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.

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

This website calculates angles of view of lenses 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 photographic camera body and a lens. It is confined to cameras where the body allows interchangeable lenses, most usually the rangefinder and SLR cameras.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock (friction lock) type. Modern still camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body. Screw-threaded mounts are fragile and do not align the lens in a reliable rotational position.

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 from the lens mount to the film or sensor can also be different. These incompatibilities are probably due to the desire of manufacturers to lock in consumers to their brand.

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. 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". A lens is not considered to be "true" macro unless it can achieve at least life-size magnification.

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.).

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.

Floating element system

Provides correction of aberrations and ensures constantly high image quality at the entire range of focusing distances from infinity down to the closest focusing distance. It is particularly effective for the correction of field curvature that tends to occur with large-aperture, wide-angle lenses when shooting at close ranges.

Non-retrofocus lens

The lens was designed for use with 35mm film SLR cameras with the mirror locked in the up position. The lens extended into the SLR's mirror box when mounted. Mirror lock-up must be activated prior to mounting the lens; otherwise its rearmost element would be in the way as the mirror flipped up and down during exposure. A separate optical viewfinder had to be mounted on the accessory shoe to confirm angle of view, because when the mirror is in the up and locked position, the subject is no longer visible through the viewfinder.

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.

Weather sealing

Weather sealed lenses contain 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.

Diaphragm type

SLR cameras require stopping down to the chosen aperture immediately before exposure, in order to permit viewing and focusing at full aperture up to the moment the shutter is released.

Historically, there are four different types of diaphragm:

Manual – the diaphragm must be stopped down manually by rotating the detent aperture ring,

Pre-set – 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 – 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 – the actuating lever in the camera, operated by the shutter release, closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Hybrid IS

The image stabilizer has Hybrid IS technology which corrects not only angle but also shift camera shake, which is more pronounced in close-range shooting when a camera moves parallel to the imaging scene. Hybrid IS dramatically enhances the effects of image stabilization during shooting, including macro shooting, which had proven difficult for conventional image stabilization technologies.

Dynamic IS

The image stabilizer has Dynamic IS technology which especially effective when shooting while walking because it compensates strong camera shake. Dynamic IS activates automatically when the camera is set to movie shooting.

Mode 1

Corrects vertical and horizontal camera shake. Mainly effective for shooting still subjects.

Mode 2

Corrects vertical camera shake during following shots in a horizontal direction. Corrects horizontal camera shake during following shots in a vertical direction.

Mode 2

Corrects vertical camera shake during following shots in a horizontal direction.

Mode 2 (Intelligent OS)

The lens incorporates Intelligent OS with algorithm capable of panning in all directions. In Mode 2, the movements of subjects can be captured with panning effects even when the camera is moved horizontally, vertically, or diagonally — regardless of the position of the lens.

Mode 3

Corrects camera shake only during exposure. During panning shots, corrects camera shake during exposure only in one direction the same as Mode 2. Effective for following fast and irregulary moving subjects.

Panning Detection

The image stabilizer automatically detects panning and then corrects camera shake only in one direction

Tripod Detection

It is often thought that image blur caused by camera shake can be prevented by using a tripod. Actually, however, even using a tripod may result in image blur because of tripod vibration caused by mirror or shutter movement at the time of exposure. The image stabilizer automatically differentiates the frequency of the vibration from that of camera shake, and changes algorithm to correct image blur caused by slight tripod vibration.

VR NORMAL

Corrects vertical and horizontal camera shake. Automatically detects panning and then corrects camera shake only in one direction.

VR ACTIVE

Corrects vertical and horizontal camera shake when shooting from a moving vehicle, or some other unstable position. Panning is not detected.

VR SPORT

Allows a continuous shooting frame rate and release time lag similar to those that are possible when image stabilizer is turned off. Automatically detects panning and then corrects camera shake only in one direction.

VR TRIPOD

It is often thought that image blur caused by camera shake can be prevented by using a tripod. Actually, however, even using a tripod may result in image blur because of tripod vibration caused by mirror or shutter movement at the time of exposure. The image stabilizer automatically differentiates the frequency of the vibration from that of camera shake, and changes algorithm to correct image blur caused by slight tripod vibration.