Re: [APML] Tri-color filters

[Chuck Vaughn <aa6g@aa6g.org>]

Jim,

I cannot imagine why they would not work with a reflector.

All I can do is take a guess based on exposure times of my images with 
my film, equipment and skies. If they're saying 1:1.5:1.5 for RGB then 
I'd try 40:60:60 minutes in your scope and go from there.

Chuck



> I'm thinking about trying RGB with my Takahashi E-160 f/3.3 Astrograph 
> and
> Tech Pan.  Chuck, would you say these filters are good for a 
> reflector?  And
> any idea on how long to expose each one for? (on something other than 
> M42)
> More like NGC7000 maybe.  Just ball park would we be talking maybe 1hr 
> 30min
> at f/3.3 for each color?  I have no idea where to start!
>
> Thanks,
> Jim Ives


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