On Nov 26, 2012, at 21:07 , Anthony Farr wrote: > There was a Makinon 300mm reflex, f5.6 as I recall. I almost bought > one second hand around 1990 and got as far as taking some test shots > in the shop which were impressive. Alas, another purchase took > precedence and I let it pass. It'd be quite old now but if you found > a clean example (refexes are a bit susceptible to fungus in my > experience) it would be worth a look. It's compactness is amazing, it > is hardly bigger than a 50mm lens, probably smaller than a Canon 50mm > lens. > > Here's a link to some comments about it: > http://www.pentaxforums.com/userreviews/makinon-300mm-f5-6-mirror-lens.html > Apparently there's a fair bit a of quality variation from sample to > sample, but you shouldn't pay much for one so it could be worth the > risk. FWIW, I was at first disappointed with my Tamron SP500 reflex > that I got in 1988, but it sharpened considerably after I put a good > UV filter up front, the only lens I've had that result from (every > other lens takes a tiny hit in sharpness when you use a UV filter).
In astronomy that filter is known as a corrector plate. If it corrects… Joseph McAllister pentax...@mac.com -- “ Nature is considerably more creative and inventive than humankind. Without Nature there isn't any humankind. Without humankind, Nature is fine.” -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
