The Denver Astronomical Society Astrophotography Special Interest Group (ASIG) July Member Gallery

Each month, the Astrophotography Special Interest Group (ASIG) of the Denver Astronomical Society gathers to share one of the most inspiring parts of our hobby—the images we’ve captured of the night sky. From stunning galaxies and colorful nebulae to detailed views of the Moon and planets, members present their latest work, talk through how the images were created, and exchange tips, techniques, and stories from behind the lens. It’s a chance to celebrate progress, learn from one another, and stay motivated under the stars.

Ciaran Rochling

Milky Way, Cygnus to the Great Rift. Taken from RMSS.Gear: Canon R6Mii shot at 24mm F/4. Integration time: ~30mins

Milky Way closeup

Sadr Region in HOO dual NB. Taken from RMSS. Gear: Canon R6Mii, Rokinon 135mm, and the Optolong L-Extreme. Integration time: 5h10m

Sadr Region by DAS Member Ciaran Rochling

Sadr Region closeup

Keith Sparkjoy

Western Veil Nebula – UltraCat 76, ASI585MM, Antila 7nm – 12h H, 12h O, 0.5h RGB

Roger Clark

Messier 16: 8-inch f/4 at f/4 with 1x Star Adventurer Quattro coma corrector. 12 minutes total exposure time with a stock Canon R5 full frame 45 megapixel camera. Seeing was ~3 arc seconds made through thin smoke, Bortle ~4. Full field of view = 2.56 x 1.71 degrees at 1.127 arc-seconds/pixel. No guiding! Tracking with RPEC (Real time Periodic Error Correction with high resolution encoders). Five-step Post processing:
1) Raw conversion with Rawtherapee to Rec2020 color space, for natural color. 2) Stack with Siril. 3) Stretched with rnc-color-stretch (color preserving stretch with integrated background subtraction). 4) Star reduction with ImagesPlus. 5) Final touch ups in photoshop.

Messier 8: 8-inch f/4 at f/4 with 1x Star Adventurer Quattro coma corrector. 35 minutes total exposure time with a stock Canon R5 full frame 45 megapixel camera. Seeing was ~5arc seconds made through thicker smoke, Bortle ~4. Full field of view = 2.56 x 1.71 degrees at 1.127 arc-seconds/pixel. No guiding! Tracking with RPEC (Real time Periodic Error Correction with high resolution encoders)

Messier 8 closeup

Philippe Duquennois

Rho Ophiuchi cloud complex

Lagoon and Trifid Nebulae

Federico Arribas

Cone Nebula and the Christmas Tree cluster – It was taken from the garden areas of the residential complex where I live (Bottle 6). It was close to New Moon and I used the dual narrowband 7nm Ha+OIII filter, but it was processed as true color. No palettes. I could only get 20 5 min subs, but despite the short integration time it had very little noise after stacking. Askar 71F, the AM3N mount and the ASI2600MC Pro camera, with ASIAir Plus.

Richard Carande

SH2-116 (PN) and friends in Cygnus – Askar 300fra-pro, 300mm fl, 60mm ap. f/5, ZWO AM3 mount, ASI 2600mc-pro camera, SHO – Broadband, 150x300s Sii, 75x300s Ha, 222x300s O, 165x120s BB, Bortle 5, Captured June 11, 12, 15, 16, 2026

NGC7023, Iris Nebula – Askar 300fra-pro, 300mm fl, 60mm ap. f/5, ZWO AM3 mount, ASI 2400mc-pro camera (full frame), Broadband, 164x120s (5.5 hours), Bortle 3, Captured June 17, 2026

NGC7023, Iris Nebula by DAS Member Richard Carande

SH2-1 (in Scorpius) – Askar 300fra-pro, 300mm fl, 60mm ap. f/5, ZWO AM3 mount, ASI 2400mc-pro camera (full frame), Antlia 3nm Ha/Oiii, 217x120s BB (7.2 hrs), 41x300s Ha/Oiii (3.4 hrs), Bortle 3, Captured June 18-21, 2026

SH2-1 (in Scorpius) by DAS Member Richard Carande

NGC 7000 – Edge11-HD, with Hyperstar V4, 530mm fl, 280mm ap. f/1.9, Celestron CGX, ASI 2600mc-pro camera, IDAS-NB-UHS Ha/Oiii filter, 138x120s (4.6 hours), Bortle 3, Captured June 17, 2026

EGB-10 (in Draco) – Edge11-HD, with Hyperstar V4, 530mm fl, 280mm ap. f/1.9, Celestron CGX, ASI 2600mc-pro camera, IDAS-NBZ-UHS Ha/Oiii filter, 139x120s Broadband(4.6hr) 183x300s Ha/Oiii (15.25hr), Bortle 3, Captured June 18-21, 2026

EGB-10 (in Draco) by DAS Member Richard Carande

David Elmore

Sh2-310 in narrowband, depicted as HOO with SII added as yellow. About 2 hours of integration of each specie using my Borg107 (424mm focal length) refractor and full-frame ASI6200MM. One interesting feature barely shows up in the color rendering but is obvious in the starless OIII extraction. There is a degree-sized bubble buried in the nebulosity. What is it, a huge planetary nebula, a supernova remnant, … ?

Rami

Crescent neb area roki 135mm f2, 1.5h from ~B3.5 KDDS sony a6700,

Milky Way – 30s Viltrox f1.2 @ f1.2 sony a6700 @ Kline-Dodge Dark Site

Milky Way – 2.5 min Viltrox f1.2 @ f1.2 sony a6700 @ Kline-Dodge Dark Site

Tommy Lease

Sunflower Galaxy – This is only 10 hrs of HaLRGB data taken with my 10” f/4 Newt, ASI2600MM and Antlia 36mm filters.

Solar Time Lapse – This is about 45mins of data cammed into a 4 second clip featuring a plasma arc prominence. Date: 6/21/26 Equipment used: Heliostar 76 Ha, Playerone Apollo 428M, AVX mount

Lagoon and Trifid – This image was taken over two nights at RMSS. This is 8 hrs of HOO, LRGB data taken with my Sharpstar 5” f/2.8 Newt, ASI2600MM and Antlia 36mm filters.