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Hi Trevor,
I've got a small panel (~A5) that I use for my 100mm refractor. It's barely wide enough for the 100mm - it covers the lens cell, but is not wide enough to cover the fixed dewcap on my scope. I've built a frame from foam that centres the panel in front of the dewcap. There doesn't seem to be any difference in the light intensity of my flat fields if I put the panel hard up against the lens cell or infront of the dewcap.
I've tried to get the measurements of the illuminated area for an A4 panel - but didn't get a straight answer from Hong Kong. A full A4 sheet is 210mm wide which should be just wide enough to cover an 8 inch scope, but it's no guarantee.
I'd rather not get an A3 panel, as I'm not really sure about cutting the sheets down - any advice on this would be welcome!
I'm not imaging as yet with an 8 inch scope, so I haven't pursued the issue any further.
Regards
David T
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