Equipment used for this test shoot: D700, Nikkor 24-70.
In improving my fast action shooting I went out to do some test shooting yesterday. I don't normally shoot in continuous mode, rather single mode all the time. In doing so I switched focus mode from single to continuous and AF-Mode from single point to dynamic area; switching back and forth between 9 point and 21 point throughout the shoot.
I have the focal point highlighted on display playback so I can verify where the exposure focused and was made.
What I saw were several images that had the highlighted focal point and some that did not, is it correct that the images that do not contain the focal point on them that the camera did not or was not able to focus?
One other question related to this topic is using Auto Area focus mode. When using this mode the only visual cue I see that the subject field is in focus is the green light in the viewfinder, there are no highlighted focal points. Is there no way to receive a visual cue to what the camera is focusing on? I have worked through all the settings in the D-700 but have not found a combination that will show a focal point.
Last question, does Nikon software show the focal points of the image, or is this reserved for only in camera viewing?
I have uploaded a file to ask for feedback on the focusing problem. The foreground and middle grass and rear of the dog is in focus but her face is blurry. This was shot at a 1/4000 shutter speed so I don't see how some things are sharp and she is not, sure fastest enough to freeze her motion.
> What I saw were several images that had the highlighted focal point and some that did not, is it correct that the images that do not contain the focal point on them that the camera did not or was not able to focus?
If the camera is operating in AF and the focus point is not shown, it means that the camera did not lock on focus. That doesn't necessarily mean that the image is out of focus, just that it hadn't locked on. I have often been surprised at how often it does not lock on.
> I have uploaded a file to ask for feedback on the focusing problem.
Clearly the camera has focused on the wrong thing. Whether that's because the sensor was in the wrong position, because it selected the wrong AF sensor (in 9- or 21-point mode it picks amongst the available ones, not you), or something else is a bit hard to determine. I deduce from the above post that there is no AF lock on shown in ViewNX or CaptureNX?
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!
Doug, What do you have your focus settings on? Possibly, you have it set to shoot whether the subject is in focus or not. In Thom Hogan's book, "Nikon D700 To Go" on page 93 he states: when you have your focus mode set to Cont Servo and your AF Area Mode is set to either Dynamic or Auto Area, whether you or the camera set the focus mode, the camera selects the final area and THE FINAL AREA IS NOT SHOWN. In Single Servo, Single Point and Dynamic Area AF Area Mode selected, your FINAL AREA IS SHOWN (focus point). Hope this helps.
Hi Cheryl, Thanks, that is quite interesting. I wonder what he means by "THE FINAL AREA IS NOT SHOWN"? Does this mean that the focal points are not shown or something else? But this is good... taking it a step further.
>Hi Cheryl, > I wonder what he means by >"THE FINAL AREA IS NOT SHOWN"? Does this mean that >the focal points are not shown or something else? > Yes, that's exactly what he is saying. I have found his book to be so much more helpful than the camera manual.
Doug, Thom's book states: "In Auto Area AF the camera always determines focus by itself, based upon a number of factors, using G or D type lenses (which supply distance info to the camera); you get no choice in which autofocus sensor will be used for focusing; the camera evaluates all 51 sensors."
I believe part of why the focus point isn't shown is that it the focus sensor isn't the only component determining focus - something to do with the metering system is involved as well, if I'm remembering properly.
I agree with Scott - about the focus points. I usually use the following set up on the D700 For Portrait or the like - subject coming towards me A-3=Dynamic AF Area = 9 points A-8= AF Point Selection = 11 points Focus Mode selector - set to S
For Moving subject: Laterrally
A-3= Dynamic AF Area = 51 points (3D Tracking) A-8= AF Point Selection - AF 51 Focus Mode Selector - Set to C