Re: [APML]: Color Film and Filters

[Mike Regish <mregish@village.yvv.com>]

>
>       Thought I would save you the extra expense that I paid out. Dont buy the
visual 
>back filters, buy the 48mm size instead--This way you can put a filter
downstream
>of any off axis guiding device and you wont be reducing the brightness of
guide stars--
>I bought a Lumicon DS filter for the back of my C11, cost was $119--By the time
>I figured out I needed the 48mm size, the price had gone up to $199 !!!
>
>Dan Baldwin


        I'm using an Orion off axis guider with a Pentax K1000. The
t-adapter screws onto the guider. Where would I put the 48mm filter. Does it
screw on to the guider, then the t-adapter, then the camera?
        I also heard (saw?) from an earlier question of mine that some
filters, at least, don't effect the ST-4's "sight" at all. I think the
H-alpha filter was one. Don't know if there are any others that don't affect it.