A friend on one of the astronomy forums asked me if one of these would be any good for taking flats.

Any good??  They are utterly superb!!!!!!!!  AND they are CHEAP!!!!!!!!!  AND if you have a large aperture scope they are also available in A3 or A2 size as well (ALSO CHEAP!!!!!!!!!!!).

I don’t think these guys realise (yet) that there is a market out there for their product that almost certainly exceeds the market for light boxes for drawing 🙂 🙂