I’ve noted before in this series of posts that the M240 has an unusually low noise floor at ISOs 200, 400, and 800, with ISOs 1600 and 3200 producing more reasonable values. Today I tried to do some modeling to figure out what was going on. Here’s the program (in Matlab), with the values entered… [Read More]

Now I’d like to quantify the effects of the blue/green shifts in the shadows that sometimes occur upon pushing M240 images. I’ll be comparing two sets of images, one that I created, and one sent to me by friend whose name I won’t mention, since he values his privacy more than the adoration of a grateful… [Read More]

I thought it might help to get a handle on the M240 green shift when pushed in post to look at the M240’s performance compared to another camera. Was this something that all cameras did, and I’d just never set up the right test conditions? I decided to construct a test image set calculated to… [Read More]

It has been reported elsewhere that the M240 suffers from banding in the shadows at high ISO settings. I decided to check it out. I made a series of exposures of a plain white screen. I defocused to make sure there was no actual image detail. I made the first exposure at ISO 3200, and… [Read More]