> Did Pentax make a high performance K mount 2X teleconvertor for > long lenses? I want one to try on my SMCK 1000mm F8. If not > Pentax, who made the best one? I dont care about meter coupling, > I'll be using manual exposure.
Although I've never tried it with a 1000mm lens, a really sweet non-Pentax TC is the Vivitar Macro-Focusing 2X TC. It's a really nice 7-element TC (among the best), with the added advantage of having a helicoidal focusing mechanism, which turns out to be very useful in turning many not-so-close-focusing long lenses into very long "semi-macro" lenses - <g>. Besides the "generic" Vivitar Macro-Focusing 2X TC, which fits onto any K-mount lens, I also have a mechanically similar specialized 6-element Vivitar Series 1 "2X Macro Matched Multiplier" for the VS1 450/4.5 Aspheric Mirror lens. It turns the 450/4.5 lens (which focuses only to 3.5 meters, for 1:8 magnification) into a 900/9 lens that focuses to 2.67 meters, for 1:2.5 magnification - kind of a neat concept - <g>. (Not exactly hand-holdable, though - <g>.) Fred - 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 .
