My Holmes-built (think Dan) Baader film solar for my 8" nexstar SCT uses an off axis opening of 2" or maybe 3" at most. Haven't looked at it for some time. It works just fine, and so saves you film for binos, or whatever. I certainly see no need for to build one to cover the whole front of the 'scope. BTW, before each use, I hold it to the sun & check very carefully for any pinholes. etc. 73, lh On 3/6/2012 10:49 AM, Kim wrote:
Anyone have thoughts about advantages/disadvantages of using a full-aperture filter versus an off-axis filter on a SCT? I'm trying to decide whether to purchase or make a full-aperture filter. If I purchase a sheet of film and make an off-axis filter I'll have enough film left over for one or two pairs of binoculars. I'm always for saving a buck or two - or 25 or 30 (for another piece of film).
Kim
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