Re: Future DSLR's

[Joseph Tainter]

Marnie wrote:

"But being able to have a telephoto lens cheaper is greatly, vastly, 
immensely appealing."

Marnie, there is no (emphasis) telephoto multiplication factor in using 
standard lenses on an APS-sized digital slr. Everyone writes as if there 
were, but that is just a convenience of expression. With an APS-sized 
sensor, you are just using the center of your lens.

Guess what? You already have that capability. Just crop the center of 
the image and enlarge it to the size you want. It will appear as if 
taken with a longer lens.

A full-frame sensor would also preserve that capability. You would still 
be able just to crop and enlarge the center of the image, as if the 
image were taken with a longer lens.

The APS-sized sensor is not giving you cheaper telephoto lenses, just 
lower image quality.

Joe