Before I deal with all the uncontrollable and semi-controllable variables involved in making actual test photographs, I did some simulation to make sure the target would work the way I thought it would under completely controlled, albeit unreal, conditions. I wrote this Matlab script: I ran it, and plotted the results. As expected, more low-pass… [Read More]
Auto-bracketing on the M240
I went for a walk this morning, and took along what is becoming my constant companion when I don’t have anything particular in mind, but I think that a picture might jump out in front of me: the M240 with the 28mm Elmarit-M ASPH. No EVF. Small, light, and unobtrusive. The 28 is pretty soft… [Read More]
Sharpness testing, part 2
I wrote a little Matlab program to generate the targets: And, yes, all you Matlab experts, I know it can be coded a lot more efficiently, even by me. I wrote it this way so that any Java or C programmer could figure it out. Here’s what a close up of the first four layers… [Read More]
Sharpness testing
While working with the firehouse pictures, I’ve come to the conclusion that some of them – maybe even most of them – aren’t as sharp as I’d like them to be, even with flat subjects. I’m not sure what the problem is, or even that there’s only one problem, but my current suspects are: Mirror… [Read More]
A new series, day 2
Yesterday was my second day at the fire house. I took a different lens: a Nikon 105mm f/2.8 macro. It will allow me to include more area in the somewhat tight station confines, and also get more magnification should that prove useful. It’s also much lighter and easier to work with than the Sigma 180mm… [Read More]
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