Tests

Posts related to Tests

28 April 2011 - “My Photos Are Soft!”
So, you have a camera or lens that you think is not as sharp as it should be. If you are already expert at these things, what follows is not for you – you already know how to analyze the problem, you can anticipate possible causes, and you know some of the pitfalls of looking [...]

15 December 2009 - Experiment #2 Revealed
Yesterday I posted “Experiment #2: What do you see?,” in which I shared six image files comprised of three identical pairs of images and asked volunteers a) whether they saw any differences among them when viewed in their web browsers, b) to describe any differences that they noticed, and c) to try to identify the [...]

06 December 2009 - Experiment #1: What do you see?
(Update July 30, 2011: Since the original test was published quite a while ago, I have added this link to the outcome of this test. Of course, if you want to give the test a try yourself, you should read the whole article, try answering the questions, and only after that come back here to [...]

26 February 2009 - Canon EOS 5D II: Early Observations on Image Quality
I posted earlier today about increasing availability of the Canon EOS 5D II at places like B&H, so I thought it might be useful to begin posting on some of my experiences with the camera during the couple of weeks (and perhaps a thousand frames) that I’ve had it. Here is a copy of something [...]

03 January 2009 - An Example of Corner Performance on the Canon EF 24-105mm f/4 L IS
I’m taking the opportunity to use the photograph I posted earlier today to illustrate a couple of technical points about equipment and technique. Here is a 100% magnification 400 x 400 pixel crop from the far upper corner of the photograph. Not much to look at, but that isn’t the point. At this resolution, you [...]
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