D800 Firmware Update Focus Improvement!

Started Apr 2, 2013 | Discussions thread
michaeladawson
Veteran MemberPosts: 7,953Gear list
Like?
Re: Sports photographers WANT AF-C to change targets, rather than hunt.
In reply to m_appeal, Apr 6, 2013

m_appeal wrote:

Um, I thought when the camera was set to focus-release, it will fire regarldess of whether focus was achieved?

Yes and no.  There is a subtle distinction in how this works that seems to elude some on DPR.  When set to Focus release the camera MUST have at least obtained a focus one time.  When in AF-C mode the camera will continue to fine tune focus as long as you keep the AF-ON button pressed.  If you move the AF spot over a different target while holding down the AF-ON buttion the focus will change.  But when you press the shutter button the camera will take the picture.  Regardless of whether the area under the current AF point is in focus or not.

If the camera has NEVER achieved a single focus lock while in Focus release mode it will NOT allow you to trip the shutter.  This is subtle but it is an important difference.

If you are in AF-C single point mode with Focus priority set...  if you aim the camera at a blank featureless wall the camera will NOT allow you to trip the shutter.  If you get close to a picture frame but do NOT let the AF point drift over the frame you still will not be able to take a picture.  But let the AF point drift over the picture frame for even an instant and the camera will lock focus.  You can now take a photo no matter where you point.

michaeladawson wrote:

m_appeal wrote:

MasterOfGoingFaster wrote:

Given that AF-C is designed for moving targets (primarily sports), doesn't it make sense that AF-C would be designed to use adjacent AF points if the primary point lacks contrast?  I sure don't want it to hunt in such a case.  And remember that a sports photographer has trouble keeping a single point on a moving target 100% of the time.

I believe the camera is working properly for the intended use.

-- hide signature --

Ken Elliott
Equipment in profile.

Only if you tell the camera you want these points used (by choosing the 9, 21 or 51 points)! What's the point of having single-focus continuous focusing mode if the camera ignores the focus point and decides to focus on something elses?

While I would agree with you, it's a moot point.  In my testing the chosen AF spot will not move if you have chosen Focus release mode.  So everyone in this thread can debate until the cows come home about how it SHOULD work.  The only thing that matters is how it DOES work and that one understands how it works so you can adjust the camera accordingly.

If you don't want the AF spot to move then set the camera to single point mode and Focus release mode.  In my testing the chosen AF spot will not move when set this way.

-- hide signature --

Mike Dawson

-- hide signature --

Mike Dawson

 michaeladawson's gear list:michaeladawson's gear list
Panasonic Lumix DMC-LX3 Nikon D200 Nikon D4 Nikon D800E Nikon AF-S Nikkor 70-200mm f/2.8G ED VR +17 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow