There is a photo of it next to a 300mm F4.0 Pentax A Lens and a 16-45 Pentax Lens. This should show it's size. There is also a a few photos taken with it of cars parked in a lot....Joe
-------------- Original message ---------------------- From: "P. J. Alling" <[EMAIL PROTECTED]> > It's a Sigma Ultra Tel, I've seen one for sale on e-Bay a few years > ago. It went for a lot of money. They are relatively rare, probably > fewer were made than the Vivitar Series 1 450mm solid cat, there were > only 800 of those made. They have a reputation of being very, very, > very good. > > > Thibouille wrote: > > 500f/4 mirror ? I'd be heaviliy suprised of a F/4 mirror lens. > > Those are usually 500/600mm f/8 or 300/350mm f/5.6. > > > > On Nov 15, 2007 1:54 PM, <[EMAIL PROTECTED]> wrote: > > > >> I do have a Simga 500mm F.4.0 mirror lens, which is sort of heavy and I do > like it. > >> Here is a link to to a photo of it on my photo.net page.There are three > photos of it on that page....Joe > >> > >> http://photo.net/photodb/photo?photo_id=5771640 > >> > >> > >> > >> -------------- Original message ---------------------- > >> From: Thibouille <[EMAIL PROTECTED]> > >> > >>> I think mirror lens have the realyl advantages (well more or less) of > >>> being: > >>> > >>> * portable (but a bit too much, they are too lightweight for the focal > >>> length IMO and as such difficult to stabilize). In the end you still > >>> need a tripod which kinda negates the argument. > >>> > >>> * cheap. and I think this is the major point why people buy those. I > >>> have one although I didn't pay for it (long term loan ;) I'm sometimes > >>> very happy having it. I know I will *never* be able to pay for > >>> "proper" 500mm lens. so I'm happy with my Tamron. > >>> > >>> True the bokeh is indeed very problematic. But as a chgeap astro lens > >>> like moonshots (at least for a newbie like me) I think it is a very > >>> acceptable solution... not without obvious drawbacks. > >>> > >>> -- > >>> Thibault Massart aka Thibouille > >>> ---------------------- > >>> K10D,Z1,SuperA,KX,MX, P30t and KR-10x ;) ... > >>> > >>> > >>> -- > >>> PDML Pentax-Discuss Mail List > >>> [email protected] > >>> http://pdml.net/mailman/listinfo/pdml_pdml.net > >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow > >>> the directions. > >>> > >> -- > >> PDML Pentax-Discuss Mail List > >> [email protected] > >> http://pdml.net/mailman/listinfo/pdml_pdml.net > >> to UNSUBSCRIBE from the PDML, please visit the link directly above and > >> follow > the directions. > >> > >> > > > > > > > > > > > -- > The difference between individual intelligence and group intelligence is the > difference between Harvard University and the Harvard University football > team. > > -- P. J. O'Roark > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
