09-23-2010, 02:07 PM
[quote name='miro' timestamp='1285228994' post='3139']
Yes the dSLR was intermediate step in camera evolution. It was obvious that in digital age such complex optic-mechanical construction is not needed anymore.
I don’t want to be in Canon or Nikon shoes now. Making of backward compatible mount seems to be less and less feasible. Supporting the third mount will be more complicated EF/EF-S F/DX. The elecro-mechanical requirements for contrast detection algorithms are completely different.
[/quote]
I don't understand your last statement. As long as the interface to the lens works the same way, I don't see why contrast detection algorithms require different electro-mechanics in a lens. Phase based systems work on predictions, and in difficult situations on a loop-through; a fast contrast AF system will also have to work on predictions and/or ;loop-through, so I do not see how this will affect the electro-mechanics: it is just an interface, at least from an AF POV, to tell the lens where to move to.
If anything, it should be rather simple to create a backward compatible mount, especially for EF and EF-S lenes for Canon, and AFS lenses for Nikon. They would only have to create the appropriate adapter from new mount to old mount, which essentially should just be an extension tube with contacts.
Kind regards, Wim
Yes the dSLR was intermediate step in camera evolution. It was obvious that in digital age such complex optic-mechanical construction is not needed anymore.
I don’t want to be in Canon or Nikon shoes now. Making of backward compatible mount seems to be less and less feasible. Supporting the third mount will be more complicated EF/EF-S F/DX. The elecro-mechanical requirements for contrast detection algorithms are completely different.
[/quote]
I don't understand your last statement. As long as the interface to the lens works the same way, I don't see why contrast detection algorithms require different electro-mechanics in a lens. Phase based systems work on predictions, and in difficult situations on a loop-through; a fast contrast AF system will also have to work on predictions and/or ;loop-through, so I do not see how this will affect the electro-mechanics: it is just an interface, at least from an AF POV, to tell the lens where to move to.
If anything, it should be rather simple to create a backward compatible mount, especially for EF and EF-S lenes for Canon, and AFS lenses for Nikon. They would only have to create the appropriate adapter from new mount to old mount, which essentially should just be an extension tube with contacts.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....