edwardkaraa Posted October 31, 2014 Author Share #41 Posted October 31, 2014 Advertisement (gone after registration) I think Douglas has researched this aspect extensively and I myself have followed that thread with great interest. I have no reason to doubt his conclusions from what I have seen. It is indeed a very interesting observation, as I have experienced myself that Sony sensors definitely loose IQ with ETTR, as much as the Leica sensors, while this exposure method has been devised on Canon DSLR, and probably produces better results on them. So I definitely agree with you that it is probably not a coincidence and very well related to sensor and ADC design. Link to post Share on other sites More sharing options...
Advertisement Posted October 31, 2014 Posted October 31, 2014 Hi edwardkaraa, Take a look here ETTR with the M 240?. I'm sure you'll find what you were looking for!
k-hawinkler Posted October 31, 2014 Share #42 Posted October 31, 2014 Yup, a friend tells me that he had to ETTR on his 5d2. However, on his 5d3 it's not worth doing. So even Canon seems to be moving in the same direction. Link to post Share on other sites More sharing options...
pgk Posted October 31, 2014 Share #43 Posted October 31, 2014 Yup, a friend tells me that he had to ETTR on his 5d2.However, on his 5d3 it's not worth doing. So even Canon seems to be moving in the same direction. On the 5D and 5D2 if you underexpose and then pull up the shadows you can get line artifacts and the best way to minimise them is to ensure that shadows don't need to be pulled up - so ETTR can work, but only on images which require detail in shadows and in which the contrast range is less than the sensor can handle - and its still a faff to deal with in post. On my M9 the shadows can be pulled much better so ETTR never made good sense. A comparison of the 5D3 and M240 would be interesting but from what has been said and linked to, it looks as though any really good reasons for ETTR (or any other messing around with exposure) are long gone. I wonder if we will finally see the end of ISO as a useful element in photography, with software adjustment of exposure based on optimal versus actual exposure being recorded by the camera and a fundamentally different exposure system being used? Link to post Share on other sites More sharing options...
mjh Posted October 31, 2014 Share #44 Posted October 31, 2014 "Underexpose" with respect to what? ‘Underexpose’ in the technical sense of choosing a negative exposure correction value. Link to post Share on other sites More sharing options...
mjh Posted October 31, 2014 Share #45 Posted October 31, 2014 What I see, Edward, is a good reason not to mess with your exposure in Lightroom; you'll only make things worse. Or is the lesson don't overexpose? I would say the lesson is not choose a slow shutter speed when shooting hand-held. The second shot is noticably less sharp. Also ETTR is mainly applicably when shooting at base ISO. With higher ISO values, selecting a lower ISO setting achieves the same beneficial effect as ETTR would (since the exposure values are identical), but with additional latitude towards the highlights, and is thus to be preferred. Link to post Share on other sites More sharing options...
Exodies Posted October 31, 2014 Share #46 Posted October 31, 2014 Slow shutter and moving about after focusing don't help sharpness, but I found the change in colour to be the worst thing. Link to post Share on other sites More sharing options...
AlanJW Posted October 31, 2014 Share #47 Posted October 31, 2014 Advertisement (gone after registration) This is a most informatve thread. Maybe one of the most useful in a long time. Thanks to everyone. Link to post Share on other sites More sharing options...
sandymc Posted October 31, 2014 Share #48 Posted October 31, 2014 Also ETTR is mainly applicably when shooting at base ISO. With higher ISO values, selecting a lower ISO setting achieves the same beneficial effect as ETTR would (since the exposure values are identical), but with additional latitude towards the highlights, and is thus to be preferred. Like Michael said. There are really only two good reasons to do ETTR with a modern cameras and raw developer - either (1) to "synthesise" a lower ISO than the camera gives you, or if (2) read amplifier noise in the camera is much greater than sensor noise. And (2) doesn't apply to any any Leica than I'm aware of. Sandy Link to post Share on other sites More sharing options...
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