Originally posted by snooked This photo was not used to show a great example in labaratory conditions. I did it to evaluate the use of ISO 3200 in field conditions. This day was overcast, hot, and humid (mosquitos also). Exposing to the right would blow out the sky even worse and still make the shot unusable. For my purposes in the field I determined it would be useless to use ISO 3200. I did get respectable results with ISO 1600, as I did with my K20D also. There are a lot of good things about the K 7, but I do not see much difference in noise.
Ed
Ed
Most people have shown there the be very little diferance between ISO 3200 on the K20D vs the K-7. The K-7 has a little less chroma noise, and to me, the noise looks more ramdom.
But you still need to optimise your exposure to get the most benifit from high ISO shots.
We could argue this all day, but some others members of this board have actually shown how exposure will affect noise.
Have a look at post no. 29 here:
https://www.pentaxforums.com/forums/pentax-dslr-discussion/66151-my-k-7-vs-k-...arisons-2.html
As for your shot, shooting into the sun, on an overcast day, you cannot expect to have both a well exposed dark subject, and a sky that is corectly exposed. This has nothing to do with ISO. This is a dynamic range issue.
The issue I have with your post is that you present ISO 3200 to be unusable "in field conditions". The example you post is one of the worst high ISO examples I have yet to see come from the K-7. But I still believe that 90% of the problem with the noise in the photo is user error.