Re: [APML] Orion Short Tube 80

[Herm <hermperez@worldnet.att.net>]

Stay away from the STR 80 for photography (its great for visual, day or
night)..

I you will definitely get a flatter field, no vignetting, no blue flaring
and pinpoint stars edge to edge with a Nikon 300mm EDIF (ED: ed glass, IF:
internal focus) telephoto lens. I have seen them in Ebay for around $150.
Pretty fast at f4.5 too. There are several astrophotography web pages that
showcase this lens. These lenses outperform many telescopes doing
photography, yet I don't see too many people using them.

http://cgi.aol.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2958144400&category=48556

here is a 400mm EDIF f5.6 :
http://cgi.aol.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2958398556&category=3343


I beleive Dr. Gendler uses the f2.8 version of the 300mm for spectacular
ccd photography.


"Frank Barrett" <frankb@celestialwonders.com>  wrote:

>Does anyone on the list use the Orion Short Tube 80 for AP?  Any problems with vignetting on a 35mm frame?  As an achromat would I need a minus violet filter for film?
>
>TIA,  Frank

Herm
Astropics http://home.att.net/~hermperez

_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo