Location & Date	Backyard, Abbott Observatory- Long Island, NY,  July-August 2021
Telescope	Orion ED80 F/7 APO, Moonlite focuser, iOptron GEM45G, Pegasus Falcon rotator Image scale 2.54 arcsec/pixel
Camera	SBIG ST-2000XM Baader R G B  filters CCD temp -10°C
Exposures	Red - 6x10m  Green - 6x10m  Blue - 6x10m  Bin 1x1  for each of the 4 panels
Planning & Acquisition	Image planning - Sequence Generator Pro Mosaic tool Image acquisition - Sequence Generator Pro w/PinPoint & PHD2 (guiding))
Processing	Astro Pixel Processing -  Calibration, Normalize, Alignment,  Mosaic stitching, RGB combine Adobe CS4 -  Color Image  adjustments, Noise reduction, JPEG conversion This is a 4 panel RGB mosaic.

From Wikipedia;

 

IC 4756 is a large bright open cluster in the constellation Serpens. Known as Graff's Cluster, it is bright enough to be seen with the naked eye and considered a fine cluster for binoculars or small telescopes.

IC 4756 is also known as the Tweedledee Cluster (when paired with NGC 6633 as Tweedledum), also as the Secret Garden Cluster.

This target was used as a test of the new iOptron GEM45G mounts ability to position accurately for mosaic panels, which it has performed excellent.