Using the methods described in this post, I compute the Unity Gain ISO of the M240 at about 400, and the full-well capacity at about 33000 electrons. For comparison to some other cameras, I offer the following two graphs. The Unity Gain ISO of the M240 is right on the state-of-the-art line, and is only… [Read More]
Leica M240 green shadows, part 2
Even though the pushed M240 images at ISO 200, 400, and 800 have a green cast, it is instructive to look at tight crops of the RX1 and M240 images from the preceding post. You can see how the noise varies with ISO, and compare the RX1 noise to that of the M240. The following… [Read More]
Leica M240 green shadows
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]
Leica M240 banding, part 3
I’m beginning to get a handle on what’s going on with the M240 shadow behavior vs camera ISO setting. Here’s a series like that in the preceding post, but one stop more exposure, placing the average of the image values at ISO 3200 about 7 stops below full scale. The light is falling on the… [Read More]
Leica M240 banding, part 2
While I do some more research on the banding, here are some full frame images of the exposures in the preceeding post, sampled down to 400×600 using bicubic sharper. ISO 3200: ISO 1600 + 1 stop: ISO 800 + 2 stops: ISO 400 + 3 stops: ISO 200 + 4 stops:
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