« on: February 21, 2012, 11:04:45 AM »
When I upgraded Photoshop the last time, they offered lightroom for an extra $99. So CS6 might be a chance to pick it up cheap.
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FF EOS film SLR's came long before crop DSLR's, and when DSLR's came along, they used FF lenses from the film Era. The first DSLR's were APS-H. Their were no special "digital" FF lenses that were not interchangable on film bodies, anf still aren't!
However, it was very difficult and expensive to build high quality FF lenses at 10mm. It is possible, however to design lenses that sit closer to the film plane and have a smaller image circle for a lower cost. Some of the lens elements might hit a FF mirror, however.
Thats why the EF-S lenses were designed to be incompatible with FF, in 2002, there were still lots of FF film cameras in use and Canon did not want people damaging their camera.
Early Canon Crop cameras, D30, D60, 10D only had FF lenses to use, and this caused a lot of complaints from users wanting very wide angle lenses.
Lens technology has evolved, and it is now practical to make wide angle lenses that work with crop bodies, but it would be very confusing to create a third Canon EF lens type.
But if that's what it does, can it use the crop only lenses with a smaller image circle? Or is that a problem for nikon as it would be a problem with ef-s lenses?