My question is; what is to keep Canon from introducing a line of "EF-D" lenses which fit on the standard EOS body mount but had a smaller image circle on the film plane and optics that effectively removed the multiplier penalty?
I think it's inevitable that cameras will get smaller as digital technology improves. And one of the camera manufacturers (perhaps Canon) will introduce a small digital SLR that takes much smaller lenses. I can't imagine that we will forever be using digital cameras with EOS D60-sized sensors. Nor can I imagine that sensors on Canon's consumer cameras, if they ever reach 24x36, will forever remain that way.
If I could buy the equivalent (in focal length, allowing for the smaller sensor, and in optical quality) of a 600mm f/4 lens (or longer) that would be light and easy to carry on a hike, I'd be very interested in buying one, and I'd jump ship in a heartbeat to whichever manufacturer made it, if the price were right. When digital sensors achieve very high resolutions (not yet, but relatively soon), this will be possible.
Gerry
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