About a year ago, I identified a problem with the Leica M240. There is a clipping of very low raw values and a non-linearity near zero for those values that leads to problems in the shadows of images pushed in post. Since, for most lighting conditions and subjects, the green channel is the brightest one,… [Read More]
Search Results for: m240 green shadows
A cure for Leica M240 green shadows
Last fall I discovered an issue with the Leica M240 that caused color casts in shadow areas of images that were aggressively pushed in post. Today, a reader posted an elegant solution to the problem: http://blog.perkins.org.uk/2014/07/fixing-leica-m240-green-shadows.html There is a possibility that Jonathan may make his tool available for download.
Leica M240 green shadows, color checker measurements
I have the measurements from the images in the post immediately preceding this one. Same regime as with the Leica M9 images posted earlier, but with the Leica M240. I made an ETTR image at ISO 640. Then I made five more images, each one stop more underexposed than the previous one. I left the… [Read More]
Leica M240 green shadows, color checker images
Are you one of those people who are always skipping ahead in the handouts while the presenter is slogging through her PowerPoint slides? Well, this post is for you. Normally, I present the numbers and then the images to back them up. However, there seems to be some interest in this topic, so I’m going… [Read More]
Leica M240 green shadows with the Sekonic step wedge
I’m still trying to get a handle on the green shadows on pushed M240 images. I constructed a new experiment. I photographed this target: with the brightest patch about 3 stops down from full scale at ISO 3200. That gave me an exposure of f/11 at 1/60. I used a 135mm APO Telyt f/3.4 to… [Read More]
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