This is a 100MPix 2-tile mosaic of the Antares Region in Scorpius and Rho Ophiuchi.
Each tiles has a resolution of 60 Mpix taken with the ASI6200MM Pro monochrome cooled CMOS camera with RGB Filters of Baader. The scope is my TMB 115/805 Carbon Triplet APO with the large M82 Riccardi 0,75x Reducer at 600mm focal length with 1.3"/arc-second resolution.
Stitching the two tiles of the mosaic in Pixinsight and Photoshop was a pain due to colour and light gradients caused by the inevitable glow of the light pollution of the French Riviera close to the horizon, which is even visible at the Col du Restefond in the French Alps 150km away. I imaged the region until it vanished behind the horizon.
The horizon line formed by of the surrounding mountains at my observing location in an old quarry at an altitude of 2600m is quite low and you have a much better horizon view to the south than in any other easily accessible high altitude location in the Alps that I have been to. I wish I had more time to collect further subframes to improve S/N, but the short nights in July and the low altitude of Scorpius only allowed about 3h imaging per night.
Further information on my website:
http://www.theinvisibleuniverse.com/For a detailed breakdown of my equipment please visit my video on youtube:
https://youtu.be/XO1SWwiXphkI have summarized some information about the Col du Restefond in the French Alps as an Astrophotography destination on my website:
http://www.theinvisibleuniverse.com/Gallery_ColDuRestefond/ColDuRestefond_Astro.php
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