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 ...
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. ...
2
votes
0answers
800 views
How does Rodenstock filters compare to B&W, Heliopan, and Hoya HD?
I am looking for a good filter for my 67mm thread lens. I have good experience with the Hoya 8Layer HD cir-pol filter and I really like that it is not as dark as other filters, but it is very ...
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 ...
7
votes
3answers
148 views
What are the standard tests available to quantify lens parameters?
In some of the questions I have asked here, some of the terms frequently used to describe the difference in image quality between the cheaper lenses and the premium ones have been increased contrast, ...
7
votes
2answers
263 views
What are good test shots for finding out the capabilities of a camera?
I have a range of cameras from a (frankly awful) kiddie camera to a hybrid (Olympus Pen) and I want to take some pictures to test their (comparative) limitations.
So I want to take the same photos ...
2
votes
2answers
325 views
Are there objective tests showing the the impact of a lens hood on image quality where there is no obvious flare?
I am familiar with the function of a lens hood, and I can understand that they could help to improve the contrast of pictures. However, I'm not convinced whether a lens hood does make all that much of ...
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 ...
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
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 ...
7
votes
2answers
504 views
How to determine optimal color correction filters for a sensor?
Originally, this question was titled: How to detemine native color temperature of a sensor?
For questions about warming filters and color filters in general, leading answers indicate that for optimal ...
7
votes
2answers
527 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 ...
