If you have been following news about the 7D recently, it is impossible that you missed all the 7D reviews and comparison with the 5DMrkII. I wont even link to them, there are too many! The two most popular comparison points being the rolling shutter and the noise.
As shown in the Neutral Day post, the 7D is noisier than the 5dMrkII. Of course, everyone expected that. Still, it performed quite well as long as it stayed away from the top ISO levels. At least, that is what I thought after reading the post (and looking at pictures taken with my friend 7D).
Now, Karel Donk posted an inflammatory post against the 7D on his blog. Calling the 7D noisier than the 40D (we all know why he skipped the 50D!) and flaming Canon for its quality control. The read is interesting and offers a counter point to all the positive reviews we usually read.
While I disagree with some of the content (like why we need more megapixel), I think it is a must read for anyone thinking about buying a 7D.
That being said, should you still buy a 7D? Of course! It might not be perfect, but no camera offers so much value in the HDSLR world.
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Compared to noise you get when you add “gain” on a JVC GY-HD111, i think the 7D offer a better value