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MasterFlatOIIISTR


MasterFlatOIIISTR

OIII master flat frame - STF stretched in Pixinsight - this was taken with the original filter orientation - the radial interference pattern is less noticable due to the other variation, but is still present.

40 flat frames at 2.6 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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