Wide aperture - Pictures out of focus

Started 1 month ago | Discussions thread
BarnET
Senior MemberPosts: 1,502Gear list
Like?
Re: Could be DOF lmitations and movement
In reply to darklamp, 1 month ago

darklamp wrote:

Wide open depth of field is small at 85mm and f1.8 at these ranges.

There's a depth of field calculator here :

http://www.dofmaster.com/dofjs.html

It does not take much for the slight movement of subject and photographer to take you out of focus. A slight sway either way is enough.

Also note that while you may think you have the eyes in focus ( from the focus confirmation ) the focus areas shown in the viewfinder are not always precise and you may be a little off. And with the narrow DOF that can be enough to make it even easier to loose focus.

There could be a slight backfocus, but that's really something I would not suggest until you have exhausted all other possibilities.

You really need to test on a tripod with a static target. Once humans are involved all bets are off with such narrow DOF.

Totally agree.

The shot shown shows a clear misfocus. However it doesn't show the cause.

The model could've moved slightly or the photographer did.

If the photographer used recompose that could explain it as well. Just use an static object and tripod and try it out. As darklamb suggested.

Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Ha!New
Huh?New
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow