Questions tagged [testing]

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2answers
31 views

How to test two polarising filters against each other?

I bought 2 CPL polarising filters from the same manufacturer with the same characteristics. One is medium level and one is their highest level. The difference between them, as noted by the ...
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1answer
96 views

What is the optical problems in these test images and what causes them?

As I was recommended in the question How to determine which lenses are good at testing teleconverter quality? I was taking test pictures trying to determine lens/teleconverter quality. No I did not ...
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4answers
142 views

How to determine which lenses are good at testing teleconverter quality?

I have a Kenko 3x teleconverter and am getting generally soft images (using a Canon 5d Mark II on a tripod). I am trying to find out how much of this is due to the quality of the teleconverter and ...
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2answers
164 views

What should I do when the results from Reikan FoCal show flaws?

I've done an AFMA calibration Reikan Software. Assuming this was properly executed, do I need to take the results seriously? All my lenses do suffer from astigmatism, and also my new Canon 24-70 f2.8 ...
2
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2answers
300 views

How to test image quality with a camera that is focused to infinity?

I have to test a camera that is focused to infinity, but I cannot take an image of an object that is more then 1.5 meters away from the camera because I can't get it out of the room itself. (The room ...
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1answer
438 views

What should I test on a new camera (other than a sensor check)?

In the past, when I have gotten a new camera, I have just done a black test, or what some call a "cap test". You equip a lens, put on the lens cap, then take a series of exposures at the full range of ...
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2answers
477 views

How should I arrange a scene to test the relative sharpness of lenses with different focal lengths?

I want to compare sharpness of two lenses, consider 50mm f/1.8G vs 35mm f/1.8G from Nikon on a crop sensor camera by taking some photos (from some small size text on a paper) and review the results. ...
3
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1answer
231 views

Are “weather sealed” gear tested or rated for their sealing? [duplicate]

Context So I've been looking around at camera bodies and gear and noticed the more expensive ones have "weather sealing". From posts like these, I understand how it is implemented. However unlike ...
2
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2answers
359 views

Test the Stability of a Tripod?

How can one test the stability (sturdiness) of a Tripod? It would also be handy if it can be done in-shop
14
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6answers
5k views

What is the Leica look?

What is the Leica look that fans of the company claim is unique to them? What concrete differences are there that are most obvious to a layman?
3
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1answer
664 views

How to test the autofocus system before asking for support?

For outdoor usage I got an Olympus TG-2 compact camera. Various tests claimed autofocus: 'quick and mostly accurate' - at least I could not find any that described problems. Now, I know that I cannot ...
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1answer
2k views

How can I compare MTF50 to a manufacturer's MTF chart?

Currently working with a trial-copy of QuickMTF (Imatest's software kept crashing on me), and I'm trying to get some basic MTF readings for my Canon 85 f/1.8 lens on a 6D. My first set of test shots ...
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3answers
3k views

What would be a good indoor setup to find a lens's sharpest aperture?

I read the whole of How do you find out the "sweet spot" of a lens? — great question and answer, but it didn't discuss a potential homemade rig for finding the sharpness aperture of my ...
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1answer
583 views

How to smoke test basic functionality of a D90 during buying

I think, many beginners want to buy his/her first digital camera. Can them follow some check list to understand that the product is working and working well, has not physical damages, dust and so on. ...
6
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2answers
547 views

What to look for when testing a wide angle lens before buying?

I'm looking at buying a used wide angle lens (specifically Canon EF-S 10-22mm f/3.5-4.5 ) for a crop camera. The question What should one look for when buying a used lens? covers the basics when ...
9
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3answers
418 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, ...
9
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3answers
450 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 ...
20
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7answers
967 views

What should I look out for when buying a second-hand DSLR body?

I'm considering buying a DSLR from a friend. I've read the used lens question elsewhere on this site, but I was wondering what I should look at on the body to assess the condition?