Yes, we know.
Long ago, there was a Canon 10D measurbator called Mishkin who confirmed the 10D BF and FF issue and doing well designed test in a super systematic and scientific way:
Hey Mishkin... - Digital Photography News, Reviews & Forum 10D's AF Accuracy - Statistical Analysis - Canon Digital Photography Forums
And then, there have been the Nikon D70 focus test chart but then this one is very loose in test method and actually it is just a very rough reference afterall IMHO. So, the D70 also had problem.
So and hence, it boils down for how each camera model is better or worse than others. We have seldom heard of a D2Xs or a 1DS MkX has more reported problem than a 350D or D70 or so.
As for the AF accuracy of Pentax DSLRs for what the user have reported, I would rank as follows, with the less problematic Pentax DSLR first: K100D > K10D (newer lot) > *ist D > *ist DS > *ist DL > K10D (first lot) and *ist D (earlier lot)
So, sometimes, we should buy later to place safe (but then when we buy lately, new models are around the corners)
Originally posted by benjikan Well, Pentax Focussing Issues..Nah, not exclusive to Pentax. This is regarding the Canon 30D....
From DPReviews:
Hi all, just wondering if anyone can help out here, I recently switched from pentax to canon however the canon lenses I have don’t seem to be anywhere as sharp, I have the 16-35 2.8L USM and the 24-105L IS USM which aren’t exactly cheap lenses.
I’ve posted some 100% crops below and their resized image nothings had any processing.
Just wondering if its all in my head or maybe I need to adjust my camera settings or is there something wrong with the lenses (which are second hand but in mint condition) or maybe the camera has a focusing issue.
Cheers for any suggestions..