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Tokina AT-X PRO 16-28mm F2.8 FX Lens - Nikon AF Mount
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- A new generation of full frame lenses
- Silent DC motor with GMR senor
- One-touch focus clutch
- Used on CANON EOS 6D MARK II during the "Live View" mode activated with "Lens aberration correction" function set to "Enable", an error would occur. The "Lens aberration correction" can be set to "Disable" in case Program AE (P), Shutter Priority AE (Tv), Aperture Priority AE (Av) or manual exposure shooting mode is selected
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|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||£4.64||FREE Shipping||FREE Shipping|
|Item Dimensions||9 x 9 x 13.33 cm||10.16 x 15.24 x 15.24 cm||8.7 x 8.7 x 9.4 cm||14.5 x 9.84 x 7 cm||9.5 x 8.3 x 8.3 cm||12.5 x 8.3 x 8.3 cm|
|Item Weight||0.95 kg||0.6 kg||0.53 kg||1.1 kg||385 grams||0.68 kg|
|Max Aperture||2.8||f/4||f/2.8||2.8 mm||4.5||4|
|Max Focal Length||28 mm||35 mm||14 mm||30 mm||35 mm||35 mm|
|Min Focal Length||16 mm||17 mm||14 mm||15 mm||18 mm||16 mm|
|Mounting Type||nikon||Nikon F||Nikon||Nikon F||Nikon F||Nikonbayonet|
Style Name: Nikon
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Tokina Lens AT-X 16-28 mm f2.8 PRO FX (Nikon fit)
The ATX 16-28 is one of the Tokina´s lenses designed for Professional Digital SLR Cameras including the Canon EOS 5D Mk2 and the Nikon D700 and D3X. The 16-28 mm zoom range offers the photographer a super wide angle of view for dramatic close up effects or big takes of entire scenes. This lens was given the What Digital Camera Gold Award in June 2011.
Silent DC Motor with GMR Sensor
The Tokina 16-28 uses a silent DC motor that allows the lens to fast focus. The DC motor coupled with a GMR magnetic AF sensor work together to increase AF speed.
Aspherical and Super-Low Dispersion Glass Elements
A new 56 mm diameter glass element is incorporated into the front lens group and two more aspherical elements in the rear group. 3SD super-low dispersion glass elements are also incorporated throughout the whole optical design.
- Focal length: 16-28 mm
- Maximum aperture: F/2.8
- Minimum aperture: F/22
- Optical construction: 15 elements in 13 Groups
- Coatings: multi layer
- Angle of view: 107.11 degrees - 76.87 degrees
- Minimum focus distance: 11 ins
- Macro ratio: 1:5.26
- Focusing mode: internal
- Zoom mode: rotary zoom
- Filter size: N/A
- Width: 90 mm
- Height: 133.3 mm
- Weight: 950 g
- Built in Lens Hood
Tokina Optical Technology
A standard lens is made up of a combination of spherical lens elements. Individual "lenses" within the lens are commonly referred to as "elements". A spherical element has an even curve to the surface of the glass. However, there can be problems with such elements; light entering the center of the lens and light entering at the edge may not be perfectly focused at the same point. This is called spherical aberration. More advanced computer assisted optical designs are creating lenses with more spherical elements. More spherical elements within a lens means a greater risk of spherical aberration having a negative impact on optical quality.
Wide-angle zoom lenses and wide-angle lenses with large apertures are especially at risk for spherical aberration.
To eliminate spherical aberration, Tokina employs aspherical all-glass elements in many of its optical designs to correct this problem. The aspherical shaped surface of the lens element focuses light rays entering both the center and edge of the element correctly at the film plane for an accurately focused image. In addition to correcting spherical aberration, these elements fully correct light quantity and distortion at the edge of the image and provide excellent results when used in combination with a floating element design.
Through a close collaboration with Hoya Corporation, the world's largest optical glass manufacturer, Tokina has succeeded in producing high quality precision moulded all glass elements with a better aspherical shape than any other lens manufacturer. This technique is unparalleled in its technological sophistication and precision.
This lens, the AT-X 16-28 mm f2.8 PRO FX encompasses Tokina's new F&R aspherical moulded glass elements. These give higher performance with very even illumination in the corners and correction of spherical aberration across the image area.
SD Super Low Dispersion
When standard optical glass is used in telephoto lenses, a phenomenon called chromatic aberration can occur. Chromatic aberration is the inherent tendency for glass to disperse (separate) a ray of light into the colours of the rainbow. The rainbow effect created by a glass prism is the most dramatic demonstration of chromatic aberration. In lenses, it is much less pronounced, but still creates slightly out of focus colours, akin to an "optical noise" that has a negative impact on the quality of the picture. To eliminate chromatic aberration, Tokina employs expensive, special glass material having super- low dispersion (SD) properties.
Lenses in the Tokina line-up with the SD mark incorporate these super-low dispersion glass elements, minimising the secondary spectrum or optical noise caused by chromatic aberration.
Tokina's wide-angle and standard zoom lenses feature a higher quality of optical glass known as Tokina HLD (High-refraction, Low Dispersion) glass. Having higher refractive index and lower dispersion properties, HLD glass is far less than standard optical glass to create lateral chromatic aberration, which is often a problem with conventionally designed wide-angle lenses.
Reflections off the surface of lens elements are the enemy to any photographer and to every lens manufacturer. They are reduced or eliminated by bonding multiple layers of a transparent anti- reflection chemical to the surface of the glass. Tokina has developed and enhanced a coating technique for all of its optics so that they will maintain faithful colour reproduction and render clean, sharp images.
Floating Element System
When designing a lens, Tokina calibrated its astigmatism at all points between minimum focus distance and infinity so that it will give the higher image results at all settings. However, when there are large differences between the focus limits, effect calibration is not possible. A floating element system incorporates optical elements that move in proportion to the focus setting of the lens. This allows astigmatism to be corrected. Many Tokina lenses employ floating element systems to provide optimum correction of astigmatism from minimum focus distance to infinity.
Internal Focus System
The two most used methods of focusing a lens are either the complete straight forward movement of lens elements (used mainly with single focal length lenses) or the rotation of the entire lens barrel group (used mainly with zoom lenses). The internal focusing system used by Tokina move each element group within the lens, but does not change the overall length of the lens. This is especially useful with telephoto designs.
The internal focusing system has a number of advantages including;
- Faster focusing
- Improved handling due to fewer movements near the centre of gravity
- More compact lens designs
- Superior use of filters because the barrel with the filter thread does not rotate.
Focus Clutch Mechanism
Tokina AT-X PRO series lenses all feature the patented "Focus Clutch" Mechanism for switching the lens between auto focus and manual focus modes.
The manual focusing ring can move (be snapped) back and forth between an AF and MF position. When the focusing ring is forward in the AF position, it is not engaged to any of the internal focus gearing and will turn freely. Without the added weight of the metal ring the camera can auto focus the lens more quickly and smoothly.
For manual focus, simply rotate the focus ring all the way to one side or the other on the focus travel, either infinity or it's closest focusing distance, then pull back (towards the mount plate) on the manual focus ring. While pulling back, rotate the ring from one side of the focus travel to the other. When the gears align, the focus ring will snap back into the MF position and the lens can be focused manually.
To return the manual focus ring to auto focus mode, simply snap the ring forward from any point.
Tokina 16-28brLens hoodbrInstruction manual
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It tends to be on the heavy side but then to me that means quality with less plastic.
You do not need to worry about a lens filter with this lens just use the lens hood.
They probably don't make a lens filter wide enough for this lens.
There is one WARNING I need to give to all prospect Canon users. Though the mount will work with your Canon body, Tokina lenses have a bad reputation for their limited compatibility in terms of focus. If you look online there's plenty people struggling with getting many of Tokina lenses to capture focus and shot. Most common advice is to ship them back and get a replacement, but if you buy used and you've got no warranty there's a WORKAROUND: apart from shooting manual that always works but isn't too convenient, you can change your focusing from "One Shot" to "Servo". It may be slightly limiting in some situations, but usually works better than manual.