| Reply Nr. 3 - Posted: 05-4-12 4:16 AM | 
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Reply By:  aquilan
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Ad Jorge) Did You take this pictures in JPEG or RAW? If it was RAW, what kind of development have You used?
Ad Piotr) I fully agree with You. Sometimes I choose to underexpose a little to achieve better stillness of move  Some noise You may filter later at development, I don't mean that it is without effect on IQ, but if You have "motion" blur, it is much more difficult to deal with.
Ad Bajanexile) I agree that most smart and experienced users are able to avoid using extreme ISO but I am not sure about colours rendition. I know that my Sony cameras are (like) toy-box (in comparison with Nikon D800), but I convinced myself that You may do almost anything about colours in post-processing of RAW. It isn't only correction of white point balance or vibrancy/saturation, but also correction of exposure, gamma, light fill/recovery, correction of black point - everything of above influence to reception of colours. I know that You may write that it is better to have those rendered well at camera output, but it don't need to be great problem, You may always use some batch processing I believe that one of few thinks that cannot be post-processed is ability to distinguish colours (sometimes called dynamic range) values and brightness. It is very connected to a general performance and characteristic of light/picture sampling to digital form at all points of signal processing. Other thing is natural noise of sensor, even at low iso - and it's tendency to accelerate noise while improving sensitivity of sensor. For me ISO1600 was highest used ISO with my Sony Nex-5. With Nex-7, noise levels at ISO1600 are higher and I don't like them anymore. It is a cost of higher MPx count at the same APS-C size of sensor, but I couldn't choice - i really wanted integrated EVF and standard Sony flashgun port. I did some attempts with higher ISO (than 1600) at certain conditions, but in 99% cases lowering aperture value gives better results than rising ISO. If You are not able to lower aperture more at those condition, You are probably using wrong Lens (too slow) or You don't have tripod with You or You made wrong decision not to use flashgun or other artificial source of light. Best regards, WZ.
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| Reply Nr. 2 - Posted: 05-3-12 12:15 AM | 
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Reply By: shapencolour
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A quick look at the photographs I took yesterday (not yet ready) in the rather dark barocco church interior with NEX7 and Distagon 18 f3.5 at ISO 800 showed pretty nasty,patchy chroma noise in deep shadows,visible after lightening up RAW files by approx. 0,5EV.That was probably because all pictures were underexposed by 0,7 EV.I simply did not apply usual exposure compensation that balances out light loss caused by the adapter.Preliminary conclusion is to avoid even the slightest underexposure with the NEX7 to minimize noise issues.It is very sensitive to that.
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| Reply Nr. 1 - Posted: 05-2-12 7:46 AM | 
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Reply By:  bajanexile
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I tend to ignore many Web Forum comments as many of the contributors do not actually know what they are talking about. DP review is amongst the worst example. You have the Nikon Camp VS the Canon Camp etc. etc. and they spend their time slagging off the competitor. The Acid Test with these people is "Do they actually post images that you can look at?" From my experience, 99% have no images that you can view and if they do they are usually ordinary or down right crap. Most real world photography does not require the extreme ISO's that eveyone is constantly argueing about. There are much more important parameters than extreme ISO performance E.G how about Colour Rendition for instance?
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