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Adapted on Sony a7R with Commlite adapter. I recommend it :D Very bright, shooting indoors without flash is not a problem anymore. Testing in a room with one window only, in a daytime without flash at ISO 50: -At f1.8 1/250sec, sharp from center about 65% of the image. -At f2.8 1/200sec, sharp 75%, lost a bit of the brightness, but it's a sweet spot between the sharpness and brightness. -At f3.5 1/160sec, sharp 80%, brightness is still good and not loosing many details, a bit of noise is appearing, but still can be easily removed. -At f5.6 1/100sec, sharp about 90% brightness is not that good, quite a lot of noise is appearing, but still can be removed somehow. -At f10, 1/50sec 100% sharpness, image is starting to suffer from motion blur and ghosting, brightness is very very low, and at this point can't get rid of the noise and loosing many relevant details. At this point would be better to use flash. So as you can see this lens is usable to f5.6 indoors. But outdoors is simply fantastic at any aperture! I can compare the image quality to my Minolta MD Rokkor 50mm f1.7. I'm satisfied!Leggi l'intera recensione
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