DavidBM Offline Upload & Sell: Off
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stevei wrote:
I got one of these today. AF-C doesn't seem to work, the focus just continuously pumps back and forth, not over the full range, just over a small range around the point of correct focus. It does this even at f/2.8, in good light, and with a subject I'd expect to be easy for it to focus on. Maybe I just need a firmware update, has anyone else had this behaviour?
I think the lens produces images with a nice overall look, as I expected from Phillip's pictures above.
However, my copy appears to be quite badly decentered, with the right side much sharper than the left, and the situation reversed when the lens is used upside down:
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http://www.cloudedforest.com/sharedfiles/sony50macroupsidedowncomparison.jpg |
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Of course, the retailer is now out of stock, so I can't immediately try another one. If both sides were as good as the right hand side of this lens, it would be a very impressive lens, but maybe whatever issue is making the left hand side soft is also making the right hand side sharper than it would be with a symmetrical copy. The above pictures were taken at f/4.
Note that it was a cloudy sunny day, so the sun is brighter for one of the two pictures above, making the picture with the brighter sun look a bit sharper and more contrasty, but the left right difference is roughly the same in both pictures....Show more →
A common cause of the AFC pumping at wider apertures is that somehow the camera got turned to CDAF mode. Find the wretched setting deep in the menus and turn on PDAF cures it....It happened to me once, and I have no idea how. Bug?
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