Doggre@xxxxxxx moved upon the face of the 'Net and spake thusly:
>
> What I'd like to know is how would you frame such a shot without risking eye
> damage? Isn't it dangerous to point your camera directly at the sun,
> especially with a long lens?
It was taken with a H-alpha filter, which is a very dark filter
(filters out all light except the frequency of the strongest peak in
the Hydrogen emission spectrum) used for solar (and other types of
astro-) photography. There may also have been another solar filter
(just a very very strong neutral filter) in use as well.
Telescope shops will be able to advise you on the kinds of filters you
need.
See also:
http://www.mreclipse.com/Totality/TotalityCh12-1.html#Right_Filter
http://www.u-net.com/ph/mas/observe/solar-p/solar-p.htm
and of course:
http://www.covingtoninnovations.com/astro/index.html
--
| Christopher Biggs --- Stallion Technolgoies | One of the founding membata,|
| Evil Genius Division, Brisbane, Q, Australia | Society for Creative Pluri. |
| Send mail with "Subject: sendpgpkey" for my PGP public key. MIME mail OK |
\_____________________ UNIX -- To Serve And Connect _________________________/
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|