The tests tag has no wiki summary.
43
votes
4answers
9k views
What is the best way to micro-adjust a 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 ...
23
votes
3answers
1k views
How can I test a new lens to make sure it is operating correctly?
How can I test a new lens to make sure it is operating correctly? I found two similar questions with answers specific to things such as sharpness and focus, but I want to cover any and all possible ...
18
votes
4answers
1k views
How to test actual focal length?
From Matt Grum's comment to my previous question, I learned that manufacturers may casually "round" actual focal length of a lens to some nice number that gets printed on the box and stored into EXIF. ...
7
votes
2answers
529 views
How to test noise?
I'm just looking for what's the best technique to test for noise on a camera.
Like what settings are best? What type of photo is best? What lenses should I test with? Like those sorts of things. ...
8
votes
2answers
1k views
How can I/should I check the sharpness of my camera lens?
The sharpness of a lens is a major concern for most photographers. This might be because we are worried about a defect in the lens, a problem with our technique or a problem with the camera. Or we ...
14
votes
3answers
3k views
What is the Nyquist Limit and what is its significance to photographers?
The Nyquist Limit is frequently mentioned in the context of lens and sensor resolution.
What is it and what is its significance to photographers?
Here is an example of it being used by DPReview.com ...
13
votes
3answers
302 views
How to test what aperture is actually used?
It seems odd to me that Canon EF 100-400mm f/4.5-5.6L does away with a front element of only about 63 mm, as reported by @jrista - which would be enough for only f/6.3 at 400mm, missing the spec by ...
13
votes
1answer
578 views
Where can I find good test image(s) to send to a print lab?
I am looking for a good test image to send to a print lab, to test my system's color calibration.
I'll be sending my own photos too, of course, but I would also like to include one or two test images ...
