The Rikenon 300/4.5 has a tripod collar, but it's small. It may be strong enough, but it's not beefy like the Pentax 300/4.5F's.
The Sigma 300/4 APO Macro AF has a strong collar, but I don't think Shel would like its light focusing, which goes from infinity to 1:3 in 90 degrees. Its predecessor, the 300/4 APO (not macro), was made in manual focus and came with a decent collar. But I don't think Shel would like its construction, and optically it's not on par with the fine APO Macro. All the 300/2.8s have nice collars, but I got the impression Shel is looking for something more affordable. Various M42 300/4s have collars, but the Russian ones will not be optically great and the East German ones may have been designed for 6x6 and adapted to M42, without benefit of an auto switch. Of these, the nicest and most expensive is the Carl Zeiss Jena 300/4 Auto Electric MC (86mm filter!), which I believe does offer an Auto switch, as its name implies. I have an Austrian source that's selling it new, or perhaps reconditioned with warranty, for about $375. The Pentax 200/4 Macro collar will fit the 300/4.5 FA. I don't know how easily one could obtain it, or what it would cost I wish someone could find out which of the Canon EOS aftermarket tripod collars could be used on which Pentax 300/4s and 300 4.5s. -- Paul Stregevsky Shel Belinkoff wrote: > >I'm on the lookout now for a high-quality 300mm/400mm with a good, > >strong tripod collar. Alan Chan replied: Unless you consider third party lenses, F*300/4.5 is the only option. Shel replied: I don't think that's correct. [EMAIL PROTECTED] -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ . - 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 .
