Bob Sullivan and I saw one of those at the Helix store in Chicago last year. Wow! That's one big lens, and in a moment of greed and lust I did a mental calculation of my bank balance ...
Thoughts of that lens brings up a question. When using a teleconverter, the effective focal length of a lens increases and the effective aperture decreases, so a 400/2.8 becomes, in effect, an 800/5.6 with a 2X converter. Going in the opposite direction, would an 800/4.0 be "equivalent" to a 200/1.0, or even a 100/.50? > > Don't you have the just-short-of-40-pounds 800mm f/4? :) > > I wish. I saw one of those suckers once. I had my camera > mounted to it and got to look through it and everything. -- Shel Belinkoff mailto:[EMAIL PROTECTED] http://home.earthlink.net/~belinkoff/ http://home.earthlink.net/~belinkoff/darkroom-rentals/index.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
