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Old 26-05-2012, 09:12 AM
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circumpolar (Matt)
and around we go

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Join Date: Jan 2006
Location: Quakers Hill, NSW
Posts: 426
Advice: Off-Axis solar cell or not (Baader)

I am about to make my first solar cell for my 12"LB.
I only have one A4 sheet of Baader solar film.

Q: should I make an off-axis circular window to fit between the secondary mirror veins or....

Make a central circular window as large as I can using the A4 film?

Or..... Make an off-axis rectangular window as large as I can so as to cover about one half of the aperture? This option let's me use most of the film and maximize (I think) the available aperture.

Any thoughts and opinions would be appreciated.
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