Ken wrote: Subject: Re: F.S Tamron SP 500mm f8.0 CF Tele Macro Mirror lens Before I sell this to KEH, I thought I'd see if anyone on the PDML list is interested. A lightweight and super compact way to get 500mm. It is fixed aperature @ f8.0. Has all the original accessories (instructions, hard case w/strap, 4 - 30.5mm filters with their own case), with original box. Needs Tamron Adaptal -2 mount to be used. I have several Tamron Adaptall mounts for screw and bayonett Pentax that are available. Also available is a companion Tamron 2X SP BBAR MC converter. Can be used on a wide range of SLRs. The current KEH catalog lists three of these in EX+ to BGN condition for between $119 to $179US. I would place this lens @ LN- to LN. If interested please contact me off list. Ken Waller I, too, bought a used version of this lens, and after having it cleaned and serviced, I found it over exposed everything by about one and a half stops. Very weird, but I solved this problem by manually overriding the film speed setting by a corresponding amount. I have seen an explanation of why this happens to this type of lens, but you need to be an optical engineer to understand it. Suffice to say, I consider mine to be a fixed f4.5 instead of the designated f8. It's main advantages are it's light weight, and size, allowing you to use it with a monopod and, or, a flash, to get critters that you would normally have no chance to capture with conventional gear of equivalent size. Resolution is not great, but then, neither is it's price. I'm pleased I bought mine......only cost me NZ $100.00 :-D Max. - 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 .
