Originally posted by pcarfan This is what DPR review had to say when they tested the 7D (Comparing the D300s and the k-7 and the 50D).
"Again, the graphs below confirm what we can see in the sample crops. The 50D produces more chroma noise than the EOS 7D at higher ISOs. The Pentax K-7 is still slightly worse than the Nikon and EOS 7D at very high ISOs but the gap is smaller in RAW. At high ISOs the the 7D and its closest rival, the Nikon D300S, are more or less level in terms of chroma noise."
NOTE THE "SLIGHTLY WORSE" AND "GAP IS SMALLER IN RAW".
This is with the K-7. Later the K-x was reported as the best APS-C iso performer, and to beat it one has to get a FF. The K-x has about a 1.5 to 2 stop advantage over the K-7at high iso.
Now early reports seems to imply the K-5 to have as good as a high iso perfromance as that to the K-x.
Now, why in the world would anyone ask such a question as you pose ? yet many do (not just you....I am sorry if this looks like I am targetting you, not my intention, just the pattern I am seeing). the 7D and the D300s only had a slightly better high iso performance than even the K-7 for god sake...the k-5 will run circles around them.
I too am so glad the K-5 is priced the way it is....hopefully that will help with this mass inferiority comples Penatxians seems to have.
The D300s and the 7D are not even in the same league to the K-5 for iso performance., they were only slightly better than the K-7 at very high iso...the D7000 however could be comapred with the K-5 for high iso performance.
No No sorry, I can post 2 comparison shots 1 with the 7D and one with the K7 the 7D is more than a stop better and I guarantee that...
but you should at least add this also
Up to ISO 800 the differences between the competitors are pretty marginal. The only camera that is visibly noisier than the rest is the Pentax K-7. As we go up the sensitivity scale the gap between the Pentax and the others widens even more but the two Canons and the Nikon D300S stay pretty close. As usual the Nikon maintains a very good balance between noise and image detail up to the highest sensitivities. The EOS 50D's approach to noise reduction is more heavy-handed and results in more blurring of fine detail than on the Nikon. Despite its higher nominal resolution and therefore smaller pixel-pitch, the EOS 7D produces a marginally cleaner image than its sister model at higher ISOs, but crucially also manages to retain some more image detail.
All in all the EOS 7D is, considering its impressively high resolution for an APS-C camera, doing a very decent job. On a pixel level it shows comparable amounts of both luminance and chroma noise to its most direct competitor, the Nikon D300S, but its higher nominal resolution will give it an advantage when printing or displaying an image on a screen. Images taken with the two very high test ISO settings are not always pretty to look at. However, the two 'Hi' settings are there in case you need them and the output is certainly usable at smaller sizes.
and in RAW
With noise reduction turned off we get a more accurate idea of how noisy these sensors are and the image looks slightly different to what we've seen above in the JPEG section of this page. The Pentax K-7 is much closer to the pack but it also becomes clear that the 7D produces a cleaner image than the 50D and, at very high ISOs, also than the D300S. This explains to a degree the 50D's slightly softer JPEG output at high ISOs. Its JPEG engine has to apply more chroma noise reduction than on the 7D in order to get noise onto the same level. He was just stating that the K-7 was better than in Jpeg,
and about the K-5 running circles around the 7D or the D300s we'll wait for the reviews but I honestly don't think it will be better the same maybe, as in Dxo canon 7D has slightly better high ISO noise than Kx and I see that from my friends Kx after ISO 6400 detail from 7D is better and a little better NC.
Last edited by SpartanWarrior; 10-16-2010 at 09:04 AM.