Flame Nebula and the Great Orion Nebula(2)

Flame Nebula: a part of Orion Molecular Cloud: to the left of Zeta Orionis (a blue supergiant star). Numerous stars inside the nebula cause its glow; interstellar dust forms dark filaments.
A deep scarlet canvas of hydrogen nebula lies beneath Zeta Orionis; a dark spot, which resembles (in better resolution) a head of a horse is (obviously) called Horsehead Nebula.

Setup: Canon EOS 600D with Jupiter 37A(135mm focal length f/3.5 lens) on EQ-5 (motorized, unguided). ISO=400; f/5.
It is the severely cropped result of stacking of 45 frames (120s each taken during three nights) calibrated and aligned in IRIS. Stacking of frames was done in FITStacker using a sigma-clipping algorithm. Post-processing: RawTherapee, NoiseWare, FITSwork.

January 2017
Kyiv (Osokorky district)

The Great Orion Nebula: a better version of the image posted before [45x120s]

Both nebulas in one image (three bright stars are Orion's belt) [45x120s]

Orion Nebula

An evening of 19th of January 2017 was clear, so I caught the first deep sky image in the new year!

I brought my motorized EQ5 to my backyard, put Canon EOS 600D (with Jupiter 37A lens) on it and captured a series of frames up to full discharge of Canon's battery (an outside temperature was -6*C approximately). I managed to capture 27 lights (about half of them with the best quality I used for image creation).

The target was the Great Orion Nebula (M42). This is my second attempt to catch the Nebula.

Calibration and alignment of 13x120s light frames were made using IRIS (7 darks, 7 offsets, and 7 flats were used for calibration). Calibrated frames were stacked using FITStacker. Gamma-correction and initial color balance were done in FITStacker too. Then the resulted png image was post-processed in RawTherapee (additional level and color balance); image noise was reduced in NeatImage. The resulted jpeg image was slightly fitted by FSViewer. The image is cropped (see the second one for full version).

Full (uncropped) image.
The same set of frames processed in DeepSkyStacker (calibration, alignment, stacking). Then the stacked result was treated by FITStacker (gamma-correction, initial color balance). Post-processing was done in RawTherapee (additional level and color balance) and NeatImage (noise reduction).

Annotated version of images (by nova.astrometry.net)

Большая Туманность Ориона / The Orion Nebula

Пробный снимок Большой Туманности Ориона (M42), сделанный 15 января.
Обработка: IRIS + FITStacker. Цвет туманности немного странный, хотя по сравнению с обработкой в DeepSkyStacker (см. фото в сообщении от 19 января) видно немного больше деталей.

2015-01-21 ~21:39 [Canon EOS 600D + EF 50mm f/1.8 II] 30x3.2s; f/2.5; ISO 3200

В левой верхней части изображения виден "пояс Ориона" -- три звезды, выстроившиеся в одну линию; левее нижней левой звезды пояса просматривается туманность NGC 2024 ("Пламя").