Hy guys,
I don't post very often because most of the time my ideas are very well presented by other forum members, so why bother
...
Like many of you I wondered myself what camera should I buy, because my old K20 was very good on his time but it fells outdated now. I can't afford a FF nor do I wish one even if I had the money to spare (I have my reasons but I don't want to debate now).
So, I thought about Sony A55, Nikon D7000 and Pentax K-5 as possible chooses. After carefully studying each camera (and still owning Pentax glass) I decided that K-5 is the choice. In my country the price is only 50 dollars more expensive than D7000 and because I see a difference in IQ between them, for me it is the logical choice.
I guess most of you are well in not very well informed about the K-5 capability's and it makes no sense to debate them all over again, but one ting which I discovered accidentally (actually it was more of a self provocation after GordonBGood insisted that Pentax k-5 was using NR above ISO 1600 in RAW files, and I could not believe the amount of detail still kept so I researched below ISO 1600 in ISO 100/200 territory).
My answers are cleared now, from what I've seen Pentax K-5 has indeed a stop advantage over D7000 even at ISO 100. In the image below I magnified 4 times the original crop from as a precise levels of gray as I could (the histogram for each image square has the peak almost in the same spot)...
The rest I think anybody can jug for himself. Anyway, similar tests can be made by anybody, so fell free to make your one conclusion, don't believe me.
I've done similar tests between K-5 and D700 (this time) and D700 was 1/3 or 0.5 stops better in the middle gray's than k-5 but k-5 has lower red/magenta noise at all ISO's in the blacks.
With best regards, Alexandru
Last edited by seliscan; 11-01-2010 at 05:46 AM.