It’s been a few years since I last imaged objects in Orion which is favourably positioned right now. The night of the 30th January 2019 presented an opportunity albeit very cold to image using my modified Canon 700D DSLR, Astronomik clip-in 12nm Ha filter and Samyang lens on the CG-5 mount. By the end of the session frost covered the equipment.
This image is composed from 12 x 300 second and 16 x 170 second light frames taken at f/2 and ISO 400 and stacked in Deep Sky Stacker with 10 x 180 second and 47 x 300 second dark frames and master flat and bias frames from my library. Subsequent processing was done using StarTools. A 30% layer of the monochrome image was added to the RGB using the LAYER Module to enhace the brighter regions.
The resulting image has captured a roughly 9.6 x 6.3 degree area with Saiph to the lower right to Mintaka upper left, the area incorporating M42 to The Flame Nebula and Barnard 33 (Horsehead Nebula).