[APML] Wratten Filters Was: (Hydogen Alpha Deep Sky Filter Source)

["Jim Janusz" <jjanusz@dc.rr.com>]

Sorry for the late reply on this.  Re: Wratten filters, last time I checked
Adorama in NY could supply all of them in the standard sizes.  Check the web
site at:

http://www.adoramacamera.com/

Search on Wratten and it lists them all.

Jim

----- Original Message -----
From: "John C. Mirtle" <jmirtle@shaw.ca>
To: <astro-photo@seds.org>
Sent: Saturday, September 28, 2002 6:01 PM
Subject: Re: [APML] Hydogen Alpha Deep Sky Filter Source


> Bill;
>     As the Lumicon Ha was not useable on a Schmidt camera, I have used the
> Wratten 92. It has worked out quite well allowing me to go very deep, and
it
> rejects a good amount of light pollution. However, it may be hard to find.
> You might find the odd store that has some Lumicon stock, if you are
lucky.
> Another option that I have about but don't have any experience with is
> something called an R60 filter by Hoya. Apparently, this filter is used by
> amateurs in Japan, as a replacement for Lumicon's Ha. Perhaps someone on
the
> list can comment?
>
> John Mirtle
> Calgary, Ab. Canada
>
snip



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