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Showing results for tags 'bi colour'.
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ste7e posted a topic in Imaging Challenge #6 - Narrowband DSO (Now Closed)Hi My first serious go at a narrowband image taken over a few nights from my back garden in not-so-darkest North Staffs Ha: 30 x 300s OIII: 28 x 150s R: 22 x 30s G: 22 x 30s B: 22 x 30s (I also took a whole load of L lights but didn't use them in this versions - still feeling my way in to NB imaging) RGB lights used for star colours only. Calibration: Bias and flats, no darks (dithering) Ha used for Luminace and Red channel OIII used for Blue and Green channels Equipment list in sig
Heres an image from a few nights ago (8th) of a section of the Veil nebula. exposures were not as long as I would have liked due to cloud passing over, conditions were very average. This is a bi-colour image taken through the skywatcher mak Newtonian scope, an Atik 314L plus mono, with a 7 nm h-alpha filter, and an OIII filter. the h-alpha filter was 10 x 5 mins exposures, and the OIII filter was 9 x 5 mins.