Jay Todd <[EMAIL PROTECTED]> wrote: >To those that have used a 2X tele-extender with a telephoto (200 or >300mm), what do you seem to find to be the compromising element...loss >of sharpness, contrast, etc? When I used a 300/4A* with a 2x-AS I was >always impressed with its results. But now with another system I'm >getting a slightly diffused image with a 70-200/2.8 and 2xEF, more so >than I would have expected.
Personally, I'd never use a 2x teleconverter with a 70-200 zoom, even a top-quality f/2.8 one. Generally, I stick with top-notch primes for use with teleconverters. Occasionally (under extreme duress) I have resorted to a 1.4x or 1.7x with my FA*80-200/2.8, but it's usually too much compromise for my taste. Zooms are a compromise, "consumer grade" lenses are a compromise and teleconverters are a compromise. I try to limit myself to one compromise per photo, maximum. :) -- Mark Roberts Photography and writing www.robertstech.com
