Finally micro-adjusted lenses on A77!

Started Dec 27, 2012 | Discussions thread
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arie Regular Member • Posts: 423
Finally micro-adjusted lenses on A77!
1

I've been putting off the micro-adjustment of my lenses until the last two days and finally just did it with a moire pattern on my monitor. I converted the mm of the lens to feet. (mm x 50, converted to feet), then measured it out from the monitor to the calibration point. So a 50mm lens should be approx 9 feet away from the monitor.

There's a great page about the various ways to do this (among many pages out there), at http://www.northlight-images.co.uk/article_pages/cameras/1ds3_af_micoadjustment.html

The results and final adjustments didn't make a lot of difference, but if you want to be spot on with AF, it's worth doing. You basically make the camera AF on the pattern, then switch to focus peeking mode to verify that it is indeed in focus. If you manually adjust it and the color peeking gets more pronounced, then you need to make some adjustments (+ or - depending on which way it's out of focus).

Anyway, probably preaching to the choir here, but my results:

Min 50mm 1.7 (+1) @ 9 feet
Min 80-200mm HS G (-3) @ 13-30 feet
Min 100-300mm APO (0) @ 15-30 feet
Tam 90mm DI SP Macro (0) @ 14 feet

If you have a big floor, you can pretty much do anything under 200mm. I cheated on the 300mm and adjusted at 200mm.

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Sony SLT-A77
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