On Mon, Jan 11, 2010 at 8:29 PM, P. J. Alling <[email protected]> wrote: > On 1/11/2010 8:18 PM, Adam Maas wrote: >> >> On Mon, Jan 11, 2010 at 9:18 AM, Mark Roberts<[email protected]> >> wrote: >> >>> >>> William Robb wrote: >>> >>> >>>> >>>> From: "eckinator" >>>> >>>> >>>>> >>>>> 2010/1/10 Rob Studdert<[email protected]>: >>>>> >>>>>> >>>>>> You might appreciate this little 7D test video: >>>>>> >>>>>> http://canonfieldreviews.com/7d-cold-winter/ >>>>>> >>>>> >>>>> ouch... that hurts indeed... >>>>> >>>> >>>> To be fair, he did have the dog running through a snow drift. >>>> Not that my K7 would have kept up with that anyway. >>>> >>> >>> Anyone have any experience with the AF on the Sony A850 (or A900)? >>> Just askin... >>> >> >> Excellent on the centre point, better tracking than Pentax but aside >> from centre-point-only, not even close to what a D700, D300 or 7D can >> do. The centre point AF is quite good in low light as well. >> >> I've had a chance to play seriously with the A900 and was impressed. >> Best Viewfinder I've seen, good AF, great handling. >> >> That said, if AF performance is an issue, nothing touches the high-end >> Nikon and Canon bodies (note this specifically does NOT include the 5D >> or 5DmII, which have AF that's worse than the A900/A850). >> > > Funny but I would consider a camera with a street value of about four times > what I paid for my K20d to be a high end body, which describes the 5DmII. >
The 5D costs half of what Canon's high-end bodies do, and that matters to Canon which does considers them amateur bodies, which is why they share most of their AF systems and much of the body design with bodies which cost 1/3 of what they do (the 5D is essentially a full-frame 20D, the 5DmII a full-frame 50D). They lack the high-end AF units of the 1 series or 7D. The 7D got high-end AF because of the necessity to compete with the D300, it's rather much an exception to Canon's typically rigid product stratification. Nikon's quite different, they've traditionally seen no problem with offering 95% of the performance of their high-end bodies in upper-mid-range bodies (like the D300) and they regularly make bodies in that class which actually outperform their pro bodies (the Fm2n, F801, F90, D100 and arguably the D300 at launch all are examples of this. -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
