A77/A65 not compatible with current Sigma HSM lenses

Started Sep 21, 2011 | Discussions thread
TomNielsen
New MemberPosts: 14
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Sigma 18-250 works, but with issues.
In reply to trainerKEN, Feb 17, 2012

I have the A77 and the 3,5-6,3/18-250 mm Sigma lens (it came with the A77 Compatible firmware sticker.) While it works, it does have issues.

I posted a video sample on youtube http://www.youtube.com/watch?v=vQt_qWW_Jfc

Basically, when at 18mm it won't refocus as I swing from far away (15ft) to close (3ft). The closer object will stay out of focus. It's a weird thing, if I get even closer than 3ft, then the it will refocus.

Less an issue is at 250mm. While it does focus, it seeks for a very long time to get a focus lock on 15ft away objects (as can be seen in the video).

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