When you reach the time you found out to be solar noon for your location, mark out using string/tape/whatever you have along the line of the shadow cast by your stick. You’ll want something at this point to mark the north-south line – I used string.
#Acracy of backyardeos polar alignment free
Look up the Solar Noon for your location and free up that time. A better way to work out the north-south line would be during the day, get a stick and mount it 90° to the ground. You can use a compass here to get the rough direction of the pole nearest you. The first thing you need to know is which way is South/North.
A bit of wood with a 1M dowel screwed into it, 90° to the flat surface. The method used here is called Drift Alignment by Robert Vice, or D.A.R.V for short. You can use the polar scope that is built into your mount (if it has one!), but if like me you’re in the southern hemisphere you might find it to be pretty difficult to use. One of the problems facing beginners is how do they align their mount with the celestial pole. DynamicCrop, removing the less interesting edges of the imagesįar less effort was required to reduce the noise in this image – TGVDenoise was able to eliminate almost all of the small scale noise in a single pass without ruining the details of the nebula. Curves Transformation x2 to bring out the colours. Histrogram Transformation x2 to further stretch the image after noise reduction. UnsharpMask (masked, with a range mask so only the interesting nebulae were affected). TGVDenoise (masked, L channel extracted post-histogram extraction). Image integration (using Winsorized Sigma Clipping). Blink to make sure everything aligned well. Blink to find and remove any really bad frames. BatchPreProcessing, calibration and debayer. Total integration time: 165 minutes PRE-PROCESSING DETAILS: This may well be the most exposures I have taken of one object in one night, and the resulting reduction in noise is fantastic!Ĭamera: Canon 450d w/ IR filter removed, GSO coma correctorĥ0 bias frames, 20 dark frames, 50 flat frames. Thirty-Three 5-minute light frames, calibrated, registered, stacked, and post-processed using PixInsight.
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