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Thanks for the advice Greg. I actually stretched the old tea shirt over the scope this evening and put the EL sheet on top of that and managed some 1 sec flats that don't look too bad but again that was at 1 x 1 binning only. 4 x 4 was still blown out at 0.001 sec.
Tonight I am looking at the same capture using 1 x 1 and the same exposure time to see the diference. Should be an interesting exercise.
Looks like I still have a few items to contend with regarding flats but I will get to the bottom of it eventually. It has to wait until night as it is way to hot in the observatory during the day.
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