Comet 2020 Neowise

Comet 2020 Neowise (aka C/2020 F3 NEOWISE) was easily visible in the evening in the Northern hemisphere during the July 19 week end. While the kids were doing a bonfire, I did some DSLR pictures, at 200mm of focal and f/2.8, without bothering with an equatorial mount (most of my time was spent supervising the bonfireContinue reading “Comet 2020 Neowise”

Processing the Cygnus Mosaic

Processing the 30 tiles Cygnus mozaic was a bit of a challenge. First there is the logistic of handling about 2,000 frames and then the Borg 55 f3.6 astrograph exhibits strong field distortion making the merge of the images difficult, particularly where the corners overlap. For each of the 30 tiles I ran the PixInsightContinue reading “Processing the Cygnus Mosaic”