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Optical design
| Format: 35mm SLR
Type: Zoom lens
Focusing: Auto Focus (AF)
Lens mounts: Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), Pentax K, Pentax K, Pentax K, Pentax K
Optical design: 16 elements in 12 groups
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Specifications:
| Focal length | Max. aperture | Min. aperture | Blades | Min. Focus (m.) | Filter Ø (mm.) | Weight (gr/oz) | Length (mm/in) |
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| 28mm - 70mm | f/2.8 | f/22 | 8 | 0.7 | 77 | 719/25,4 | 108.5/4,3 |
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Additional information:
The Tokina AT-X 287 PRO SV AF 28-70 mm f/ 2.8
The optical system of the Tokina AF 28-70mm f//2.8 AT-X PRO SV(model 287) is remarkable for its sharpness all over the frame, constant lens speed of F/2.8 at all focal lengths, as well as for its angle of view from 75° 20’ to 34°20’. The distinctive feature of the lens is a wave ultra-sonic motor. The use of this innovation ensures focusing as quick as possible.
The lens has been improved thanks to the use of multilayer antiglare coating. It considerably reduces or eliminates the effect of reflection from the surface of lens elements.
The technical peculiarity of the Tokina AT-X 287 PRO SV AF 28-70mm f/2.8 is its unique proprietary One-touch Focus function to change between AF and MF operation by pushing/pulling the focus ring. This improvement allows you to avoid shifting AF/MF switch (on Nikon camera bodies or on Canon lenses) every time when choosing between AF and MF modes.
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angle of view 75° 20’ to 34°20’
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Internal Focus (IF)
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proprietary One-touch Focus function
Links to online resources:
Posted by: shubshik Date of publication: 25.09.2010
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