Questions tagged [back-focus]
The back-focus tag has no usage guidance.
23
questions
2
votes
1answer
70 views
Back-focusing with Canon 7D2 body and Sigma 50mm art lens: is the Sigma USB dock the solution?
I just bought a second hand Sigma lens (50mm Art f/1.4) for my Canon 7D2 body (Mark II). This combination yields a very serious back-focus problem:
With no micro-ajustements correction on my body, ...
1
vote
1answer
912 views
Can I calibrate a Nikon D7000 body at home?
Is it possible to calibrate a Nikon D7000 body at home so it doesn't back focus anymore? I did several tests compared to my brothers' identical equipment (body+lens) and concluded it is the body which ...
0
votes
1answer
967 views
D750 back button focus and remote
I have a Nikon D750 on which I have setup focusing to be on the AE-L/AF-L button (not on the standard shutter release button). Works fine. Now when using a remote (in my case the Pluto trigger), ...
0
votes
5answers
6k views
How can I fix back/front focus on my Canon 50mm F/1.8 STM lens?
I have a Canon EOS 1200D body with a bunch of lenses. A while back, I acquired the new Canon 50mm f/1.8 STM lens, and started noticing that the images were soft. After a bit of experimenting, I found ...
1
vote
2answers
2k views
Why does my D5200 autofocus behind the subject with my 35mm f/1.8G lens?
My Nikon D5200 works perfectly fine with two of my lenses, 18-140mm and 85mm. But it has an auto-focusing issue with 35 mm f/1.8G lens. The point where it seems to have focused is not as sharp. It ...
1
vote
1answer
133 views
Are any photographers known to intentionally make “creative” use of front/back focus settings of a camera?
A couple of weeks back I was testing my lenses for front/back focus, and an idea struck me: it's entirely possible to setup the camera to constantly back or front focus, so to permanently change the ...
1
vote
1answer
257 views
Front AF confirmation focus with manual lens?
Today I was testing my lenses for front focus/back focus (and while I was at it to test detail resolution at various aperture values), and found a really strange issue.
From what I know, front/back ...
3
votes
1answer
349 views
How can AF adjustment be inconsistent across lenses?
How is it that sometimes a lens will work fine on a camera body without adjustment yet others need some AF micro adjustment tweaking. I would imagine that the accuracy of the AF system with regards to ...
0
votes
1answer
3k views
Best AF Fine tuning for Nikon D7000 lenses [duplicate]
Over the last few months I've been noticing an annoying back - focus problem on my Nikon D7000, regardless if I was using a AF-S or AF lens. But the problem seems to happen more often on my 35mm 1.8G ...
0
votes
0answers
205 views
What would cause an AF confirmation light to go on and off as I approach correct focus?
I'm using two cameras: Canon EOS 400D (Digital Rebel XTi) and Canon EOS 450D (EOS Rebel XSi). 450D was more heavily used than 400D.
Not so long ago I noticed that 450D's autofocus system works not ...
2
votes
3answers
483 views
When a lens and camera are callibrated together, which is changed, and might other lenses be adversely affected?
I wonder what exactly is the calibration of a camera body and a particular lens. I know the effect, but how it is achieved?
I recently bought 80-200 (the two-ring version), I was waiting for too long ...
3
votes
1answer
908 views
Should back-focus be constant for all focus distances?
I have a problem: Back-focus of my lens is not constant so it is not possible to calibrate it using AF fine tuning.
I have body Nikon D7000 and the lens is Nikkor 50mm f/1.8 D. I've bought the lens ...
4
votes
1answer
11k views
How can I fix my Nikon D7000's back focusing problem?
After using a new Nikon D7000 camera for awhile, I've found that that my camera has back- focusing issues - many images are out of focus, even portraits or focusing on near objects where I have ...
5
votes
1answer
2k views
Do all telephoto zoom lenses backfocus on the wide angle end?
I’ve just gone through a round of testing with two telephoto zooms, on two different cameras, and both appear to have significant back focus issues at the 70mm end.
I just had the Nikon 70-200 f/2.8 ...
8
votes
1answer
666 views
How do repair shops fix focus shifts on bodies lacking focus microadjustment feature?
For camera bodies without autofocus microadjustment capability, how do repair shops calibrate a specific body and a lens combination suffering from the focus shifts (back and/or front focusing)?
4
votes
3answers
952 views
Does Nikon D7000 exhibit particular backfocusing problems?
I was considering buying a Nikon D7000 but I have found that (as of 2011) many reviewers were reporting back focusing issues. I would like to verify if these issues are real, and if they are still ...
4
votes
1answer
225 views
What factors influence whether a lens and camera combination front or back focus?
I know that sometimes a lens/body combo needs to be micro-adjusted to attain ideal focusing behavior, and that this is usually because of sample variation, but which parts of the lens and/or body are ...
2
votes
1answer
1k views
Problem with TTL autofocus on Canon 450d - is there a way to adjust?
I have Canon EOS 450D, and it seems, that camera have problem with autofocusing, when i'm looking through optical viewfinder. If I switch camera to liveview - autofocus works correctly, but slow.
The ...
6
votes
1answer
254 views
Does backfocus/frontfocus change?
I have adjusted the back-/frontfocus setting in my camera for different lenses.
Now I am wondering if I have to readjust the lenses regularly? Does the back-/frontfocus for a lens change much over ...
16
votes
2answers
26k views
What do “Frontfocus” and “Backfocus” mean? [duplicate]
I've read those terms in a couple of lens reviews, and not even Wikipedia has an article about it.
So my questions are:
What is back/frontfocus?
What causes back/frontfocus?
Is there any preventive ...
37
votes
4answers
93k views
What is back-focusing?
What is back-focusing? Is it something I need to be worried about, or can I just live with it? How can I tell if my camera/lens is sufferring from it?
11
votes
1answer
1k views
How can you tell if a lens is having problems with back focusing?
I recently bought a Canon EF 24-70/2.8L to use with my 450D and I suspect that it is constantly back focusing. Is there any way of determining if it is something wrong with the lens or if it is a ...
54
votes
5answers
23k views
What methods can be used to micro-adjust autofocus of a camera body to a particular lens?
I have a Canon 7D with a 50mm f/1.4 lens, and I think the auto-focus of the lens is off. How can I test and adjust this reliably?
Will this approach work with all of my lenses? If I had a different ...