On the evening of June 17, 2020, I took up a little extreme shooting of nebulae from the city. Extreme, since in conditions of strong urban exposure, the capture of diffuse nebulae without filters is very difficult. Fortunately, I am the owner of the wonderful Optolong L-eNhance filter, which only passes lines of hydrogen H-alpha, oxygen OIII and hydrogen H-beta. I had very little time for shooting, as the nebula quickly moved between the neighboring house and the tree. I am satisfied with the result, given the short shooting time – only 15 minutes. Also for shooting, I used a four-lens apochromat Meade 70 mm quadruplet apo.
Orion is still available for observation in the evenings. I decided to shoot the Orion Nebula with second shutter speeds with 127 mm Schmidt-Cassegrain. In total, 1200 frames turned out, of which I manually selected the 521 best frame and stacked it. The capturing was carried out on an azimuthal mount Sky-Watcher AZ-GTi, field rotation compensation occurred when two stars were stacked to Fitswork.
I also made bicolor, replacing the blue channel with green. Nevertheless, I like the original RGB version more, because the blue channel (H-beta) is still different from red (h-alpha) and green (O-III). Читать далее (Read more) > > >