Same as nikon s ed or canon s ud glass.
Tamron 17 50 2 8 vc full frame.
Extra refractive index glass allows smaller size di ii.
The tamron 17 50 2 8 sp xr di ii vc barrel finish is slightly textured and the markings are painted onto the barrel not engraved.
The di ii designation indicates that the tamron 17 50 2 8 di ii vc is a lens designed for use only with crop sensor cameras.
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And world renown macro lenses.
The compositional options afforded by the sp 17 50mm f 2 8 di ii vc s wide to moderate telephoto zoom characteristics are prized by experienced photographers rendering a picture angle range approximating a 26 78mm lens on a full frame dslr or a 35mm slr.
The barrel is made of a plastic material but the lens mount is metal.
2 usm fulltime mf yes the canon usm autofocus motor is legendary and it is faster more accurate and quieter than the tamron autofocus.
This marketing baloney means.
Although a friend has.
This 17 50mm is an extremely high quality standard zoom with a high luminosity of 2 8 over the entire focal length range.
Probably all comes from hoya.
Vibration control same as nikon vr or canon is.
Lens line up includes a trio of fast f 2 8 sp zooms.
Focal length markings for 17mm 24mm 35mm and 50mm are printed on the barrel.
Tamron lenses deliver a superb fusion of performance and value enabling today s high resolution dslrs to perform at their peak.
Tamron sp 15 30mm f 2 8 di vc usd g2 lens for canon ef tamron tap in console with altura photo essential accessory and travel bundle 4 9 out of 5 stars 17 1 199 00 1 199.
Only works on 1 6x and dx cameras won t work on 1 3x or 35mm or full frame cameras.
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It belongs to the super performance sp class of tamron lenses distinguished by ultra high optical and mechanical quality.
That was true of the tamron predecessor pre vc tamron af 17 50mm f 2 8 xr di ii ld sp zl aspherical if zoom lens for canon digital slr cameras and it remains true in this model.
