About 8 months ago, while I was dreaming of the Mark III and then looking at my bank account, then looking at the Mark III (a vicious circle, I assure you) I jumped in on the 1d series bandwagon, along with a 12% then-live.cashback incentive, and got a 1d Mark IIn for shooting sports, birds, and other things of suitable motion, speed and distance. I bought it on ebay, the body appears well used, lots of little scratches and such on the LCD, but works good. 86k shutter clicks IIRC from my first 1d camcount trial on it.
In practice using this body, I had to do alot of post processing on these images to get them sharpened up to what I am used to receiving from the 5d. So, I did a test with my favorite long lens, the Sig(insert monster name here) 120-300. I thought crap, i've got a front/back focussing sigma again. Well, on the 5d, this thing rocked. Smack on focus and sharpee. Slap it on the 1dMk2n and i get that fuzzy look at the focal plane, even though its DOF will be great, with the same camera settings (which it was, I checked). SS up above 1/640 also...and rested on the ground, eliminates camera shake.
I know you're going to want to see the pics, but if I do, I'm afraid you'll just say...'hey, they look pretty close...sure, needs some sharpening, but acceptable'. I can just hear it.
I sent it off to Canon today, first for a good sensor cleaning, perhaps the original owner muffed an attempt and left a haze on the sensor. Then I also asked Canon to check for any other potential causes for soft images.
My question to those of you with similar experience, was I expecting too much from the 1d Mark IIn compared to the 5d? I know there's megapixel difference, but if all settings being equal, but sharpness should be on par with the best, correct? Am I the anal nay-sayer, or would you have shipped it off also?