I mean for wildlife photography when a 300mm lens can become a 450mm lens (or the long end of a zoom) -- hey, that's neat! Finally longer telephotos will be in all our price ranges. Sure, wide angle folks are out of luck, but each manufacturer seems to be coming out with a 15mm - something zoom to deal with that. More 15mm or something primes are not far behind.
REPLY Yes, my 500mm mirror lens became a 750mm and the majority of the light fall off was gone using the *istD Bill
