Re: [APML]: Lumicon's H-Alpha Pass Filter

[Chuck Vaughn <aa6g@aa6g.org>]

Fredrick A Kazmierski wrote:

> Could someone explain the purpose of Lumicon's H-Alpha Pass Filter?  I
> have their Deep Sky Filter and have used it with good results for color
> photograghy.  How would the H-Alpha Pass Filter enhance my astrophotograghy?
> Is it for B&W only?
> 
It's for B&W photography of nebula at the H-alpha line. I've also found
it useful for photographing dark nebula with my lens because the lens
produces smaller stars when limited just to red light.

The filter will allow you to expose about 6 times as long compared to no
filter to reach the same sky fog level, thus recording much more
nebulosity.

Chuck  <aa6g@aa6g.org>