How do i do the AF Micro Adj in Sony A1.

[Suresh Rao]

Hi Everyone !!

I intend to move to Sony A1 from Sony A99 ii. I plan to continue to use the Sony F4 500 G lens (A mount lens) with an adapter on the Sony A1. However, I cannot find the menu option to do the AF Micro Adj in the Sony A1.  In the Sony A99ii it was under the AF3 menu. 

[Pieter]

In short: AF micro adjustment isn't needed in mirrorless cameras, so the option is irrelevant.

In DSLRs, the focus module is in a different light path than the photosensitive plane. Minuscule differences in the lengths of these paths can be compensated for with AF Micro adjustment. In mirrorless cameras, the photosensitive plane also contains the focus points. So whenever the camera detects proper focus acquisition, the focus is also exactly on the photosensitive plane.

That is, until you use an LA-EA4 adapter to mount your 500mm f/4 onto your A1, which uses its own AF module instead of the cameras AF system. I would strongly advise against going this route: you'll have a state of the art camera with an insanely good AF system, and then you dismiss it 'in favour of' a very dated and compromised AF mechanism. Better try the LA-EA5 if you really want to keep using your old lens.

 

Edit: apparently autofocus doesn't even work with the LA-EA4 on the A1.

https://support.d-imaging.sony.co.jp/www/cscs/accessories/compatibility.php?area=gb&lang=en&mdl=ILCE-1&cat=7

Edited July 22, 2024 by Pieter