> Andre Langevin and i have been talking offline about situations > where a 1000mm lens is required. we couldn't justify the price > either. i spent about $2K on a Pentax PF-100ED spotting scope with > the PF-CA35 adapter to give me a 1250mm/12.5 equivalent. there are > times when you just have to spend the money if those shots matter. > the spotting scope solution is a stopgap measure that is barely > adequate for me, but since i don't have the $7K either just yet, it > will have to do. that extra stop and a half to get to a f/8 would > have made a difference in some of the shots i attempted.
The spotting scope solution seems to be quite popular here in the UK (Digiscoping) but I've not been tempted myself, yet! There are times when I need a 600mm lens and use a 300 f/4 with 2x EX converter, I'd love a 600mm f/4 but I think that's as far as I'm prepared to go, although I have looked at the Sigma 800mm f/5.6. I could never justify spending more than that due to the limited use I would give it. John
