DPReview.com is closing April 10th - Find out more

Played at Yodobashi Camera today :)

Started Feb 16, 2017 | Discussions thread
Jeremy C Junior Member • Posts: 45
Sony AF performance

zuikowesty wrote:

I also picked up an A7 with a 24-240 or some such on it, and was appalled at how bad the focus was.

The contrast detection on the A7R is more or less useless. In extremely good light it will usually hit the focus but even then it's slow and often unreliable.

That said in my opinion the imaging sensor blows the m4/3 sensors out of the water for resolution and dynamic range. Taking the same photos side by side with the various m4/3 cameras I've used the big Sony files are more pleasing IF you can get the shot.

I tend to use my A7R with manual Contax Zeiss lenses or A-mount lenses on the Lea4 adapter which more or less transforms the camera into a SLT body with phase detection autofocus. In this configuration it performs quite well, but my solitary 55mm native lens is reduced to an expensive focus by wire manual focus lens. You cannot rely on the native e-mount lenses with contrast autofocus.

I think the main downside to the A7(i) series was releasing it without phase detection.

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow