LensTip.com

Lens review

Sony DT 50 mm f/1.8 SAM

20 May 2009
Arkadiusz Olech

10. Autofocus

New Sony lenses have been equipped with SAM (Smooth Autofocus Motor). This motor is built in the lens, not based on ultrasounds, but thanks to it autofocus is supposed to work faster and more accurately.

The autofocus of Sony DT 50mm f/1.8 SAM works quite loudly – we can hear distinct buzzing sound. In regard to speed, it’s hard to accuse it of anything. It runs through the scale, whichever direction, in approximately 0.7 second. And, as the range here is wider than with its competitors, we don’t complain at all.

It’s slightly worse with accuracy, but cheap prime 50s of competitors don’t belong to the most accurate lenses either. On average, it resulted in 14% misses in studio conditions, being little better than Nikkor and noticeable better than Canon.


Please Support Us

The coronavirus crisis has been adversely affecting many businesses and, sad but true, ours is not an exception. Despite that difficult situation we would like to preserve continuity and high quality of publications available on all our websites. Still, we are now aware it might be impossible without additional financial help. That's why we would like to ask all those who visit, read, and care about Optyczne.pl, LensTip.com i Allbinos.com for support - it's enough you send us a small sum of money via PayPal. If a lot people decide to support our websites we think we'll stand a chance and survive next months without any lasting harm. We count on your support and understanding, stay safe and be healthy.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

We also haven’t notice any tendency of front- or back-focusing.


Sony DT 50 mm f/1.8 SAM - Autofocus