25 Jul
2006
25 Jul
'06
8:03 a.m.
Thanks for the input Dave. Some good points to ponder. I wonder though, if the Yolo secondary may give you more fits than a fast primary. --- David Dunn <david.dunn@albertsons.com> wrote:
My mirror is barely f/5. I will never make a short mirror again. It has to be too precise and the collimation has to be too accurate. I use a laser and a Cheshire to collimate when I want to view all night. The laser is good enough for most of the public events. I think my next mirror will be a 20" f/10 or so, Yolo. This will give me the advantage of no ladder while still giving me a long F.L..
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