BenJohnson wrote in post #7869046
Would any EF lenses have a big enough image circle to handle a larger
sensor than FF/35mm?
With the MP race hitting its max, isn't the next step a larger sensor? That's really the only way to get more resolution, correct?
The MAJOR downside I can see, is that none of the current lenses would work, even if the mount was physically the same.
Then we can have a <1 "enlargement factor"
The only lenses likely to have a usably larger image circle are the TS-E lenses. The new 17 and 24-II TS-E lenses have a 65mm image circle, which would cover the currently available medium-format digital sensors.
Yes, the next step is a larger sensor. That will not only allow more image quality from the sensor, but will also be less demanding of lens sharpness (in return for requiring a greater image circle).
Most large-format photographers are still using film and then scanning the film at high resolution. 4x5 film scanned by an inexpensive flatbed scanner such as the Epson V-750 will, and the full capability of the scanner (which is less than what Epson claims), produce about 80 megapixels of good information. Make that over 300 megapixels if they use a high-end scanner. Photographers who use 8x10 film end up with 320 megapixels from that $600 scanner. They get image quality utterly beyond the wildest conception of small-format users.
I recently bought a 20x40" print from a gallery, and looking at it has made me realize that I will never get that kind of resolution and tonality from a small camera, no matter how much I spend. That's why I'm currently expanding my large-format equipment list.
By the way, the mount for those lenses would have to change, too. The registration distance of the EF mount is too close to the sensor to allow a reflex mirror for a format larger than 24x36. Study a Pentax 6x7 and you'll see why. But there are already good lenses for medium-format cameras available, and at a price much cheaper than high-end lenses for small format.
" I don't think I will buy any Canon lenses because some day I hope to upgrade to a Hasselblad or Mamiya with a digital back, and I don't want to have to sell and rebuy my lenses."
I can achieve the same field of view on 6x9 using my view camera and a 47mm Super Angulon, compared with a 24mm TS-E on full frame (the 47 is actually a bit wider). And it's coverage and therefore allowable movements will blow away the 24. I paid about $600 for a Sinar F view camera with bag bellows, compendium shade, standard bellows, and half a dozen lens boards, plus $200 for the 6x9 back and $300 for the lens (all used, of course). That's about the same price as the 24 TS-E Mark I lens alone. That combination, using my Nikon scanner (which, used, cost less than my 10D camera body did new), will produce a 117-megapixel image.
Rick "format is king" Denney