Re: [APML] o III filter

[Jerry Lodriguss <jml@astropix.com>]

At 11:49 AM 4/5/2002 -0800, you wrote:
>Can anyone give me some information on (o III) filters? Do they drmatically
>enhance viewing of nebulas and galaxies and are there differences from
>manufacturer to manufacturer? Plus are there any other filters I should be
>considereing when looking at deep sky objects?


Yes, it will dramatically enhance the view of a nebula with a lot of OIII 
emission in it.

The Lumicon UHC filter is a very good, general purpose filter that I would 
recommend for visual work.


The narrower the bandpass of the filter, more aperture of the scope will be 
appreciated. OIII filters can be spectacular on large dobs.

Jerry


Photoshop for Astrophotography Book:
http://www.astropix.com/APBOOK/0_PROMO/PROMO.HTM

Astrophotography, Tips and Techniques
for Digital Enhancement in Photoshop:
http://www.astropix.com

--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>