Got a UHC, Dave. I'll take you up on this task at SV, thanks. Hmmm - Thousand Oaks 1.25" - USD79.95 - pretty cheap.
But I made a promise to myself to buy only 2" filters from now on - to give me maximum flexibility.
Also, I haven't worked out exit pupil yet, but I was fairly convinced I'd be wanting to use one of my 2" eyepieces to get a good FOV.
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