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MasterFlatLUM


MasterFlatLUM

LUM master flat frame - un-stretched - this was taken with the original filter orientation - NO radial interference pattern is visible at all in the un-stretched version and the exposure looks very flat and uniform

40 flat frames at 0.5 seconds using Sequence Generator Pro. Integration time was determined using SGP flats calibration wizard.
Illumination was using an Alnitak Flatman with two layers of tee shirt fabric.

No bias frames used only Flat Dark Frames - 40 flat dark frames

ORION EON 115mm APO
ZWO ASI1600MM-COOL with a Williams Optics Flattener IV at F/5.75 with Gain - 75, Offset - 40, USB - 60, Temp = -15C






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