Greg Law Posted May 23, 2017 Share #1 Posted May 23, 2017 Advertisement (gone after registration) Does anyone know the following specification of the Leica Monochrome T246 camera: 1) spectral sensitivity ? 2) electrons per grey level at different iso setting ? 3) read noise (RMS) in electrons? 4) dark current noise e/s ? Firmware 1.004 apparently limits exposure to 60s a low iso & to only 8s @ high iso ? Is there any way to capture an image exposure beyond 60s with the T246 - new firmware ? Greg Law NY USA Quote Link to post Share on other sites More sharing options...
Advertisement Posted May 23, 2017 Posted May 23, 2017 Hi Greg Law, Take a look here CMOS sensor in T246 - characteristics ?. I'm sure you'll find what you were looking for!
Jeff S Posted May 23, 2017 Share #2 Posted May 23, 2017 (edited) Well, for the original Monochrom... http://chromasoft.blogspot.com/2012/05/leica-m-monochroms-spectral-sensitivity.html Sandy might be able to address your M246 questions. Jeff Edited May 23, 2017 by Jeff S Quote Link to post Share on other sites More sharing options...
Greg Law Posted May 23, 2017 Author Share #3 Posted May 23, 2017 Thanks Jeff The balance between visible and IR sensitivity should be a photography's choice - given the image sensor allows that freedom to 3rd party filter accordingly ? Best Greg Quote Link to post Share on other sites More sharing options...
dante Posted June 10, 2017 Share #4 Posted June 10, 2017 Here is the actual spectral sensitivity and the effect of various filters, plus a comparison to the original (Typ 230) https://themachineplanet.wordpress.com/2015/09/16/the-leica-monochrom-typ-246-and-filters/ Dante 1 Quote Link to post Share on other sites More sharing options...
dante Posted June 10, 2017 Share #5 Posted June 10, 2017 Thanks Jeff The balance between visible and IR sensitivity should be a photography's choice - given the image sensor allows that freedom to 3rd party filter accordingly ? Best Greg Maybe a photographer's choice at the time you buy a camera. I'm sure the reason why the M246 rejects almost all infrared light is that infrared light would back-focus given what the optics and rangefinder are set to do. Dark orange is already pushing it. And having the user make this choice on camera? You'd always have to have a filter screwed on - and two if you wanted contrast control. The rangefinder accuracy - except for one chosen band - would also be poor. Dante 1 Quote Link to post Share on other sites More sharing options...
fotomas Posted June 15, 2017 Share #6 Posted June 15, 2017 Made an attempt to compare spectral sensitivity with TRI-X here: https://www.l-camera-forum.com/topic/260535-tonal-curve-of-leica-m-monochrom/page-4?do=findComment&comment=3052958 Frank Quote Link to post Share on other sites More sharing options...
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