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Looks like it is going to take a new crop of APS-c sensors to approach the AF speeds of m4/3 - or Panny's AF algorithms.
I'm sorry Vivek, my post wasn't clear. My fault.
What I am comparing to is the speed of CDAF on m4/3 with the CDAF in live view on a DSLR. Both the the X1 and the new Ricoh are live view cameras using APS-c sensor. The refresh rate (frame rate) on these sensors is much slower than the sensors used in m4/3. So, what Sean is finding is that there is a practical limit to how fast these two new cameras will be able to focus and that it will take a new crop of sensors to get faster CDAF off an APS-c sensor.
Here is part of the discussion. The rest is in his review. Start reading around post #213
http://www.l-camera-forum.com/leica-forum/leica-x1-forum/105808-sean-reids-x1-part-2-review-6.html
This is a bit from Imaging-Resource about the development of AF for m4/3 (at least by Panny)
http://www.imaging-resource.com/PRODS/DMCGF1/DMCGF1VIDEO.HTM
That being said, the 20mm is the slowest of all the Panny lenses to AF and this has to do with the larger heavier elements being rotated on the 20 vs. the other internal focus lenses. When my GF1 comes back this week I would be happy to make a video for you of the difference between the AF on the 14-140 vs. the 20mm. The 14-140 is astonishingly fast.
I hope this helps clarify my bad post.
hehehe, SWEEEET Vivek....What do i know. Things moved, Kevin.
(better than the blendtech, btw)
Thanks for that. Awesome essay.Here is an interesting view on photographic equipment by Erwin Puts
http://www.imx.nl/photo/page152/page152.html
Ultimately it is the photograph that provides the standards that are needed to assess the tools that produce the picture.