70-200 f4 vs f2.8 Focus Noise

[Justin Jones]

Hello. I just got a great deal on a used 70-200 f2.8 GM but I want to know if the focus noise is normal. I have the f4 and it’s essentially silent during AF. I use AF-C 99% of the time. The 2.8 lens seems to work great and I can’t find any issues, AF is as fast as the f4, maybe slightly faster at times. However the AF motors are audible. I don’t think there is anything wrong but I was surprised at the difference coming from the f4.  I understand the 2.8 is mechanical focus vs electronic.  I think in a silent shooting situation people near the camera could probably hear the focus motors.  Is this normal operation?  Thanks!

[SnappyMilt]

If the focus noise is noticeable, it is not normal. I have a 70-200 f2.8 GM FE for my a7rii. In a quiet room, I can hear a very soft noise as it focuses. The noise does get just a little louder if it is in a focus mode that causes hunting. I don't have the f4, so I can't comment on the relative sound level compared to the f4. I do have an LAEA4 adapter that allows me to use with my old Tamron 70-200 f2.8 with my a7rii. (That lens is native on my old Sony a900 DSLR.) Now THAT is a noisy-focusing lens! It uses the old screw drive focus method. The noise doesn't matter, of course, for stills, but it is very noticeable for videos. 

Edited November 30, 2019 by SnappyMilt
correct typo