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Firmware glitch with autofocus in A99!!!!

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aardvark7
Member

Firmware glitch with autofocus in A99!!!!

I was just running through the process of micro-adjusting my lenses and have discovered a really, really annoying issue.

It affects both my A99s and more than one lens, so I know it is a firmware problem.

Basically, when using a focal length of 135mm or longer (it affects my 135 f1.8, 70-200 f2.8 at longer end, and 300 f2.8), if you try to focus on an object that is about 10 - 12 feet away and the focus is starting from the close end (as opposed to infinity), then it will give a false focus lock to about 3 feet. The 300mm will just sit there as that is below its minimum distance.

It is repeatable and seems unaffected by other settings, such as microadjust on/off, AF distance on/off, centre point or zone focus, etc.

It needs to be addressed by Sony and QUICK!!!

It is just the sort of distance for intimate portraits and the 135 is just the lens. I can't be fiddling around waiting for the correct lock!

10 REPLIES 10
Corky101
Explorer

I have recently purchased an alpha A99 and can not autofocus when using a sigma 120-400 APO HSM DG any hints and tips please.