The Ring Nebula (Messier 57 or NGC 6720) is a planetary nebula in the northern constellation of Lyra. Formed when a shell of ionized gas is expelled into the surrounding interstellar medium by its red giant star, which was passing through the last stage in its evolution before becoming a white dwarf.

This nebula was discovered by the French astronomer Antoine Darquier de Pellepoix in January 1779, who reported that it was "...as large as Jupiter and resembles a planet which is fading." Later the same month, astronomer Charles Messier independently found the same nebula while searching for comets.

In 1800, German Count Friedrich von Hahn announced that he had discovered the faint central star at the heart of the nebula a few years earlier. He also noted that the interior of the ring had undergone changes. The nebula was first photographed by the Hungarian astronomer Eugene von Gothard in 1886.

M57 is 2,300 light-years from Earth. Photographs taken over a period of 50 years show the rate of nebula expansion is roughly 1 arcsecond per century ( 20–30 km/s). M57 is illuminated by a central white dwarf , whose mass is approximately 1.2 in solar masses.

All the interior parts of this nebula have a blue-green tinge that is caused by the doubly ionized oxygen emission lines at 495.7 and 500.7 nm. In the outer region of the ring, part of the reddish hue is caused by hydrogen emission at 656.3 nm.

About two M57 diameters away, at 2 o'clock is IC 1296, the tiny barred spiral galaxy. It has low surface brightness because IC 1296 is much farther away (about 221 million lightyears) than M57's mere 2300 LY. (Source Wikipedia).

CAPTURE Information: 
The image was captured with the iOptron CEM120 mount , the venerable Meade 12"LX200 SCT, and my new QHY295m Pro mono cmos camera at F7.16 (2182mm FL).  Image subs were taken through Astronomik's broadband filters of Lum, Red, Green and Blue. 

IMAGE information -- 2022
LUM (  30s): 20 subs (0.17 hrs.) on Jul 20th, 2022.
LUM (150s): 29 subs (1.21 hrs.) on Jul 19th, 2022.
RED (300s): 20 subs (1.67 hrs.) on Jul 19th, 2022.
GRN (300s): 20 subs (1.67 hrs.) on Jul 19th, 2022.
BLU  (300s): 20 subs (1.67 hrs.) on Jul 19th, 2022.

The Lum subs were shot at 30s and 150s, while the R, G and B were at 300s.  All exposures were done at 1x1 bin, Gain 1600 and Offset 56.  Lights, Darks, Flats and Flat Darks were used for processing. 
While the camera was set at temperature of -10C, the resulting subs came out more closely to -4C due to the elevated ambient temp.

The 30s and 150s Luminance were combined using PixInsight's HDR Composition process.  This technique allows for a greater dynamic range. 
Processing was done in PixInsight following, for the most part, kayronjm's tutorial of Feb. 24th from several years back. 
This is an approximate 50% crop due to the target’s small size.

COMMENTS:
This is the 3rd time I’ve imaged this target.  
The first was in 2011 on the old Meade 12”LX200 fork mount, using my Canon XSi (mod) DSLR camera.  (Not displayed in this forum).
The second was in 2013 on the Meade 12”LX200 fork mount, using my Atik 383L+mono CCD camera, employing only narrow band filters.
This time, as mentioned above, we’re on the iOptron CEM120 using the (relatively) new QHY294 pro mono cmos camera, employing only broad band filters. 
So the latest image bears more resemblance to to the 2011 image than the 2013. 
However, there is an interesting connection with the 2013 image.  On that display I commented that there was a super nova (2013ev) visible in the spiral arm of the nearby small faint galaxy IC1296.  And since supernovas are transitory, the object no longer shows up in IC1296 in the current image. 

ONE LAST THING.  I dinked the RA drive on the CEM120 around March 21st of this year (2022).  While attempting to “relube” the RA’s worm drive I allowed the worm and worm gear to clash, causing damage to both surfaces.  It was obvious from the first images following that event that the RA drive had suffered some real damage.  I sent the mount off to iOptron in mid June for repairs.  To iOptron’s credit they turned the mount around in about 4 weeks.
However, the problem was not fixed.  This M57 target was imaged as soon as the mount was back and, unfortunately, bears the scars of the mount damage.
I will say that iOptron was really good about helping diagnose the problem this time and they’re working with me very closely to get it resolved.
That’s the way a vendor should operate.