Questions tagged [focus]

Focus is the mechanism of converging light from a point light source onto an imaging plane by a lens.

9 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
1answer
208 views

Are internal focusing primes actually uncompensated varifocal lenses?

If I shorten the focal length of a lens without taking any other measures, that will reduce the required flange distance for infinity focus - meaning that if the actual flange distance is not changed, ...
2
votes
1answer
616 views

Why is my Nikon 18-300 lens not focusing at higher focal lengths?

I found a similar question about the 18-200. Someone suggested screwing the front element tighter. Is it possible to do the same with the 18-300? My problem happens at 200-300mm. I am not sure how to ...
1
vote
0answers
94 views

Auto focus won’t work in viewfinder on Aperture priority mode

My camera (Canon Rebel t7i) won’t auto focus in manual or aperture priority mode in viewfinder. (It works perfectly in liveview) Maybe it’s important to say that I’ve never shot in manual mode so I ...
1
vote
0answers
37 views

Nikon D5300 pictures are coming out blurry

When I'm taking pictures in Autofocus on my Nikon d5300 the subject's face comes out blurry. It's not the camera shaking, the shutter speed was on 1/200. It didn't help to zoom in, however, when I ...
1
vote
0answers
31 views

Focus highlighting thumbnails

Is there any software that will analyze the photos in a directory and create thumbnails with the areas most in focus highlighted in color? I know my camera (Sony a99ii) can do this real time. It ...
1
vote
0answers
54 views

auto focus in nikon d7000

I have a Nikon D7000. I am facing a problem. AF-S, AF-A, AF-C options are not showing in the camera monitor even after pushing the AF button and moving the dial. The different types of AF mode are not ...
0
votes
0answers
19 views

Canon T6i Auto focus works on Live view but stops auto focusing on view finder

I'm sure I got a setting wrong or something. So I have AI servo active. When I open the live view the camera automatically auto focuses as I move it around from object to object. But when I close the ...
-1
votes
1answer
617 views

Focus distance and infinity

When I play with M12 lenses (board lenses. Fixed fl. Aperture) , I can focus them to a distance and they have a certain depth of field. Objects within the Delta of field looks sharp. Can these lenses ...
-1
votes
1answer
134 views

Sentimental photo taken by an iPhone out of focus

First let me say I am not a photographer, however I have a photo that was taken of my mom, myself and niece that is very dear to me. The photo was not properly focused I don't think. Could a ...