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RJ Speed Booster EF lens to NEX
หมวดหมู่สินค้า: * Lense Adaptor
รหัส : 001068

08 มกราคม 2016

ผู้ชม 648 ผู้ชม

new version Focal reducer/Speed booster adapter for / Canon EOS (EF) lenses to Sony NEX mount 3 5 6 7 camera FS700 FS100 VG

All metal structure, with excellent opticals (4 elements/2 groups)


what it does:

  • reduce the focal length (by 0.72x wider)
  • Ex. 50mm lens on NEX with the adpater, eff. focal length is 50mm x 1.5(crop) x 0.72 = 54mm 
  • effectively increases the maximum aperture of the lens by 1 stop (in other words, under the same aperture, you can use faster shutter speed (by 1 stop).

and this new version is made to overcome the a)blue spot b) slight green tint issues in the old version

the edge fall-off is still to be expected though, this is by nature, not a design issue

what it does not:

  • there is no electronic integration, no auto fucusing

Note:

this adapter is best used with EF lenses; EF-S lenses might incur vignetting;

Also, some EF-S lenses (like the new 15-85mm -- see pic. below, due to the rear end protruded plastics casing, it will collide with the optics inside the adapter)

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