EXCERPT page containing first few paragraphs. 2023-03-21 17:01:55
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Usability: Exposure Limits
Firmware version 2.0.0.11.
The shutter speed dial design precludes using an exposure longer than 8 seconds in manual exposure mode (though auto exposure goes to 60 seconds with the M240).
In addition, there is a hard limit of 60 seconds for exposure at ISO 200 (as of firmware 1.1.0.2), with shorter limits for higher ISO values.
In practice, this means that night exposures are often 1-3 stops underexposed for interesting outdoor conditions, greatly increasing the noise. Yet well exposed 60 second images show no sign of this being a sensor quality limit.
Tuolumne River erratic by moonlight
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Leica M240 + 50/2 APO-Summicron-M ASPH