Yesterday we saw that the Leica M240 is “ISO-less” five stops from full scale — moderate shadows in a normal outdoor scene. Today, I repeated yesterday’s testing, but two stops from full scale — the brighter parts of a normal outdoor scene, but short of the highlights. Actually, the blue channel is two stops from… [Read More]
Archives for 2013
Is the Leica M240 ISOless?
With the noise floor and self-heating testing out of the way, we’re ready to tackle the question, “Is the M240 ISOless?” If that question makes no sense to you, hang in there. Explanations follow. Let’s talk a bit about how your camera works. First, there are the photosites, or sensels, which are little features (usually… [Read More]
Leica M240 noise floor vs ISO
The next step in the characterization is to plot the way that the noise floor varies with the ISO setting. I let the camera cool down for five minutes between collecting the 16 samples at each ISO. Here are the results: The standard deviations are pretty low compared to the averages, so it doesn’t make… [Read More]
Characterizing the Leica M240, part 1
In the next few posts, I’m going to characterize the Leica M (Typ 240), hereafter called the Leica M240, or just the M240. The first thing I do when I characterize a camera is see if there are self-heating effects that I need to watch out for. If there are, it makes the testing process… [Read More]
A new series
For the last two or three months, when I haven’t been working on a comprehensive upgrade of my voice/data network, I’ve been developing a new photographic series. The photography is a lot more fun. The series – no surprise to those of you who’ve been following my work – is based on motion. It’s different… [Read More]
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