theSuede wrote:
(2) High-pixel cameras do very well in normal circumstances, but if you\'re looking for maximum latitude in exposure, fewer MP still wins - even with the highMP camera downscaled.
Huh? Have you looked at 24 MP D3X vs 12 MP D3/D700?
theSuede wrote:
(3) Per pixel quality has in fact almost DECREASED ever since \'2004 if you plot the general trend over all models.... Which means that the numerical increase in MP is in fact screwing you with marketing trickery.
Are you referring to Canon alone or across all brand names?
Make no mistake about this: the 12 MP D300s/D90/D5000 (released in 2008-2009) are better than 10 MP D200/D80 (released in 2006). Similarly, the 10 MP 40D (released in 2007) is better than 8 MP 30D (released in 2006).
theSuede wrote:
I\'ll repost an example in this thread (it has nothing to do with the text above), I made a small comparison of the only thing that\'s currently available for scrutiny - ImagingReview examples at ISO3200. I cannot convert 7D raws yet, so they\'re all from jpgs. One thing that is immediately noticeable if you analyze the pictures is that even with teh NR set to \"off\" the 50D and the 7D does A LOT of noise reduction. Chroma smearing is on the level of 5-6 pixels, and more in the horizontal direction (). This starts from quite early in the ISO range.
Do also notice that the 7D cheats even more than the other cameras with the \"ISO\" specification - it needs 1/3-step longer shuttertimes at all ISO\'s to achieve the same exposure at the same aperture with the same lens as the 50D. The 50D is at the true value of ~ISO2350 when the camera display says \"ISO3200\". The 7D is roughly 1/3Ev lower than that - which would give a true ISO of ~2000 or lower when the camera says \"3200\". This I cannot compensate for in the comparison, not without raw access
There have been some rigorous analysis of 7D RAW files. Most indicate very high signal to noise for the 7D.
However, no one has talked about chroma noise and actual ISO sensitivity. We\'ll see how true your conclusions are.
Sep 08, 2009 at 09:10 AM
Previous versions of thw2's message #7505803 « Canon EOS 7D Master thread »
). This starts from quite early in the ISO range.