Gamma Cygni Region

A star Gamma Cygni (Sadr) is a supergiant surrounded by a complex of emission nebulas. It is catalogized as IC1318 (Butterfly Nebula) 

Canon EOS600D with Jupiter37A lens (a Soviet clone of Carl Zeiss Sonnar 135 f/3.5) @F/5.6 on motorized EQ5.

45 frame x 120 sec (ISO 800) + 23 darks + 23 offsets + 11flats.

Processed with IRIS, FITStacker, AstraImage, NoiseWare.

Kyiv (Osokorky district)

7,28x4,23 deg

Gamma Cygni -- a supergiant star -- is in the center of the image. The Butterfly emission nebula is above it.
The Crescent Nebula NGC 6888 is also visible to the bottom-left from the center: it is an outer shell of Wolf–Rayet star which is blown away by the intensive stellar wind.

9,18x6,06 deg

Annotated image (nova.astrometry.net)

[UPDATED]

Another threatment:

NGC 7789 "Caroline's Rose" open cluster

The cluster in a contellation Cassiopeia is named for Caroline Herschel who discovered it in 1783.

It lies about 8000 light-years away.

Kyiv (Osokorky district)

Angular size of the image is 2.14 x 2.14 deg

Canon EOS 600D + Jupiter37A (old clone of Sonnar 135 f/3.5) @f/5.6 on motorized EQ5; ISO=800; 19x120sec; 11 darks, 11 biases, 7 flats. IRIS+FITStacker+FSWorks4+RawTherapee+PixInsightLE

Wide-field view (captured with EF-S 18-55mm lens @18mm). A position of the above picture is depicted by the yellow square.

NGC7000: North America Nebula

Last night: the first trial of Jupiter37A lens (a Soviet clone of Carl Zeiss Sonnar 135 f/3.5) with Canon EOS 600D on motorized EQ5.

71 frame x 60 sec + 25 darks + 25 offsets;  F/4; ISO 800.

Calibration and adjustment in IRIS, stacking with FITStacker, color and gamma-correction: FITStacker, then some post-processing with FITSwork4, RawTherapee, NoiseWare.

M27 "Dumbbell" planetary nebula in Vulpecula (2)

Planetary nebula Messier M27: a remnant of a dead star (hot star's nucleus which transformed into white dwarf is visible in the center). Linear size of the nebula is several light years so our Solar System would be less than a pixel in this scale.

The picture is a result of processing 108 frames (60sec each) captured during three nights this summer.
Setup: Canon EOS 600D + EF-S f/4-5.6 55-250mm IS II standard lens @250mm, f/7 on motorized EQ5.
A stack of 108 frames + offsets + darks + flats was calibrated and aligned using IRIS, then stacked with FITStacker, and post processed with FITSwork4 and RawTherapee.

M57 Remastered

This is an image of Messier 57 nebula obtained using frames captured in the night from 16 to 17 of June 2016 with Canon EOS 600D + Canon EF-S F/4-5.6 55-250mm IS II lens (@ 250mm; F/7) fixed at EQ5 motorized mount.

The nebula is a remnant of a star, which ended active life and expelled its outer layers. A core of the dead star -- a white dwarf -- could be hardly distinguished in the center of the nebula.

Greenish color of the nebula is caused by double-ionized oxygen; a reddish color of outer layers corresponds to hydrogen and ionized nitrogen. A density of glowing gas is very small yet many times denser than interstellar medium.

Estimated size of the nebula is about a light-year, a distance to it is ~2300 light-years.

The previous image was made using DeepSkyStacker: good yet not perfect program. This picture (which is definitely more realistic) is a result of stacking of 40 frames (30s exposure each) using FITStacker program. Images were calibrated and aligned using IRIS (15 offsets, 15 darks, and 15 flats were used for calibration).

M51 "Whirlpool" Remastered

A double-galaxy in Canis Venatici

This is a result of stacking frames captured during two nights: from 8 to 9 of Jul + from 13 to 14 of Jul. Signal-to-Noise ratio is somewhat better than in the previous image.

A pair of intensively interacting galaxies are in the image; it is supposed that the main galaxy and its smaller companion have already passed by or through each other. The smaller galaxy (which probably was an ordinary spiral) has lost its arms and is significantly disrupted.

Canon EOS 600D + EF-S 55-250 f/4-5.6 55-250mm IS II + EQ5

102 light frames in total (98*30sec + 4*120sec)

Last edition on 2016-07-16; IRIS: calibration, stacking using FITStacker12; postprocessing: FITSwork4, RawTherapee; noise reducing: Noiseware Community Edition

The galaxy is located near star Alkaid of Ursa Major. Borders of the picture are depicted in the following photo (which I captured in Spring of 2014):

M51 "Whirlpool" Galaxy

M51 "Whirlpool" Galaxy in Canes Venatici, at a distance of about 30 million light years from us, is swallowing its smaller companion.
The companion probably was an ordinary spiral galaxy before the clash, now it's lost many of its stars and interstellar clouds (a portion of them created a faint bridge between galaxies).
The main galaxy is smaller than our own Milky Way (is about 2/3 of it) while it is brighter because of many hot young stars have been forming as a result of the collision.

Canon EOS 600D + EF-S 55-250 f/4-5.6 55-250mm IS II + EQ5.

49 frames by 60sec, f/7, ISO 800; 15 darks, 15 bias, 15 flats. The picture is cropped. Processed with IRIS, FITSwork4, RawTherapee.