Hi,

I have just run into a confusing issue here, so any replies would be welcomed.

What exactly is a "digital lens"? I have seen many of the lenses for D-SLRs described as "digital".

I do know that their optical elements are optimized somehow, I also know that this lenses produce a smaller image circle, but if this is so, then there would be no crop factor, right? For example:

~Canon EF-S 55-250mm f/4-5.6 IS

This particular lens has a 35mm film equivalent of 88-400mm, why is this so, if its image circle is APS-C?