allegretto;1235 wrote: OK, this is what I mean;
http://sensorgen.info/LeicaM9.html
wish I could upload it to make it easy but it seems that this site wont take reasonably sized attachments… or maybe I’m screwing it up. In any case;
you can see that raising the ISO of an M9 compresses DR and does NOT decrease read noise. That it is a CCD is not the issue, read noise is. Further, as ISO increases, saturation decreases (makes sense of course)
the implication here is that the M9 is also an ISO-less camera. Increasing ISO is actually deleterious to image quality from compression. One is better off nailing ISO at 160 and shoot using the stop or speed one needs for a given shot. Or, if it doesn’t matter, just ETTR as much as you dare. The resultant underexposure, if present, can be upped in PP.
I just wonder how the S2 works… no data yet.
Not sure if this translates to real world results. An easy test would be to shoot a test target at ISO 160, underexposed 3 stops and at ISO 1250 properly exposed. Boost the ISO 160 shot 3 stops in LR and then compare. Without doing the test (yet) my guess is that the 1250 shot will look better. If I get a few free minutes today, I will do the test with an M9 and an S2.
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