Help! Focusing issues, but not back-focusing or method =(

Started 10 months ago | Discussions
ad1083
New MemberPosts: 3
Like?
Help! Focusing issues, but not back-focusing or method =(
10 months ago

Hey everyone! Long time reader but first time poster -- I usually find my answers before I have to post my own question

I've been trying ruthlessly this week to figure out how to fix my current issue, but to no avail, so I'm hoping you all may be able to help out. Sometime last week my camera started focusing on things behind my focal point. (it's not back-focusing, though, I'll get to that). I normally shoot with single point area in AF-A or AF-C. All of my research pointed to back-focusing, but I did the battery focus test (5 batteries aligned at a 45 degree angle, camera on tripod, natural light & single center point focus only, remote trigger to avoid camera shake) and the test was spot on for focus. Yet, every photo I take with autofocus is "back-focusing".

Yes, I handhold, and yes, a good deal of time in less than stellar lighting conditions, but neither of these have affected my shots before, so they shouldn't now. In fact, I've shot flawlessly many times in the same exact lighting conditions, as I take a good deal of shots downstairs in my finished basement right now.

I've even taken tests in bright natural light with a tripod, same thing. I've been taking most of my test shots with the center focus point for accuracy (but have also tried others and all points are affected).

If I shoot at 3.5 with a 35mm lens at 7 feet away from the subject, the eyes will be clear only if I focus on something 1 1/2 feet in front. Also, when I pop it into live mode, the focus is spot on every time, even with a 1.8 dof from 3 feet away on a 35mm (understandably because of the different focusing methods, just adding for diagnostics). I should also note, it's with all lenses, so I'm assuming it's a camera issue or maybe something needs cleaning? It can't be technique, I was doing well before under these conditions and have tested in nat light with tripod, etc, so what on earth could the issue be?

Thanks in advance to anyone willing to help, this is severely frustrating and really worrying me.

Nikonicon
Contributing MemberPosts: 605Gear list
Like?
Re: Help! Focusing issues, but not back-focusing or method =(
In reply to ad1083, 10 months ago

Welcome

I have rightly or wrongly believed that we didn't have the option of choosing a single focus point using the AFA,also have doubts about AF-C being in exact focus when taking my finger off the AF-on button.Now only use single focus point for anything stationary.

Interested to find Nikon service advise me recently that my camera was back focussing,not the lens,what caused that?when did that happen ,that's anybodies guess,I saw my camera working fine before that service.

Good luck with finding your ''solve''.

Regards

Roger

-- hide signature --

Nikonicon
ex Nikonover

 Nikonicon's gear list:Nikonicon's gear list
Nikon D90 Nikon D300 Nikon AF-S Nikkor 70-200mm f/2.8G ED VR Nikon AF-S DX Nikkor 16-85mm f/3.5-5.6G ED VR Nikon AF-S DX Nikkor 10-24mm f/3-5-4.5G ED +2 more
Reply   Reply with quote   Complain
Kerry Pierce
Forum ProPosts: 17,367Gear list
Like?
Re: Help! Focusing issues, but not back-focusing or method =(
In reply to ad1083, 10 months ago

hmmm, well, you've got quite a lot of stuff going on there. Normally, I'd say not to use AF-A, unless you know that your target is the only thing that the camera's AF system will grab for focus. Even AF-C can be problematic, if your active point can't find a good focus target.

But, in your case, it sounds like it could simply be some dust or hair or something that is covering part of the AF sensors, so they might need to be cleaned. You can search for info on the net on how to do that, or you can take it to a service center. If the latter, they should be able to make sure that the camera's AF system is working properly.

Kerry

-- hide signature --

my gallery of so-so photos
http://www.pbase.com/kerrypierce/root

 Kerry Pierce's gear list:Kerry Pierce's gear list
Nikon D300 Nikon D700 Nikon D3S Nikon D7000 Nikon D5100 +11 more
Reply   Reply with quote   Complain
Keyboard shortcuts:
FForum MMy threads