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Cat's Paw in Ha
Testing out flatteners with the TMB92SS. Captured this Cat's Paw Nebula NGC6334 the other night. 13x8min subs with 12nm Ha. Flattener for this shot was the Orion Flattener with 10mm more than the theoretical spacing according to the equipment's advertised backfocus etc. I think the field is pretty good. See the attached 9 panel mosaic of the corners, mid-edges, and centre. Just a bit eggy in that top right? Maybe sensor tilt?
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