[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
RE: [APML] New Schmidt Camera image: Machholz on Saturday
If you
had an idea of what the field curvature is (and you could find this out
experimentally), then you could very likely buy a field flattener (off the shelf
from somewhere like Edmund Optics) that would correct for your scope's
particular field curvature, mount the lens with your CCD in an adapter, and put
it to very good use on the Schmidt camera. Now that would be a fun little
optical design project.
Cheers,
Jason
In a message dated 3/15/05 9:29:50 AM,
comets133@yahoo.com writes:
Bradley, intersting point, I think film will be
around
for another 20 years or so, but it will be like Kodak
Max film,
useless for skyshooting but as general in
nature as possible for taking
shots with those
cardboard film cameras. Soon it will be time to
put
the schmidts on the museum
shelf!
Chris
Chris, et al:
I hope not.
As they say,
when there's a will, there's a way!!
I think someone will figure out how to
replace the Schmidt's film holder with a CCD unit which will incorporate a
built in field flattener. Yes, it will probably mean reworking the invar rods
and spider and may be costly........but just think of it.....a 300mm f1.5
Schmidt with 35mm sized (or larger) chip. While typical Schmidt film exposure
times are in the 5-10 minute range, with a CCD it might be in the "a couple of
minute" area.
Kent Kirkley
8 inch f1.5 Celestron-Epoch Schmidt
(that refuses to become an umbrella stand)
_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo