The globular cluster Messier 13 (M13) in Hercules, with the small galaxy NGC 6207 above it. The very tiny galaxy IC 4617 is just visible between NGC 6207 and M13. M13 is generally considered the finest globular cluster in the northern half the sky (north of the celestial equator). This is a stack of just two images, each 6 minutes at ISO 800 with the Canon EOS Ra and Astro-Physics EDF 130mm f/6 apo refractor with the 6x7 field flattener. The images were the last two in the sequence of 10, and were the sharpest of the set. Earlier images were softer due to poorer seeing?
Messier 16, the Eagle Nebula in Serpens. The cluster embedded in the nebula is NGC 6611. The small open cluster above is Trumpler 32. I shot this from home on a very clear night on July 31, 2019, using the Astro-Physics Traveler and Hotech f/6 field flattener for a stack of 5 x 8-minute exposures at ISO 800 with the now 10-year-old filter-modified Canon 5D Mark II.
A closeup of the Small Sagittarius Starcloud, aka Messier 24, at bottom, with the field extending north to include the nebulas M17, the Swan Nebula, and M16 at top, the Eagle Nebula. Between M17 and M24 is the small star cluster M18. Patches of red and blue nebulosity at bottom are IC 1283 and the blue reflection nebulas NGC 6589 and 6590. The prominent dark nebula at the right edge of the Starcloud is Barnard 92 with its lone star embedded in it, with smaller B93 above it. My framing was just a little too far west to properly include the M25 star cluster at lower left. This is a stack of 12 exposures, of 4- and 8-minutes with the William Optics RedCat 51mm astrograph at f/5 and the Canon EOS Ra at ISO 800. Aligned, stacked and mean combined in Photoshop. Taken on a perfect night from home on August 15, 2020 with this area just above my treetops. Autoguided with the ZWO ASIAir and ASI120MM guide camera with the RedCat on the Astro-Physics Mach1 mount. No filters employed here. I shot frames with and without Long Exposure Noise Reduction to test the difference on this warm summer night but saw little difference. But then again, thermal noise specks would be lost in the stars here! But LENR was not needed in this case.
