Elephant Trunk Nebula is my favorite nebula in the constellation Cepheus. I photographed it many times using many different telescopes. The focal length was either too short or too long. Now I tried a focal length of 414 mm and an APS-C sensor, to frame it. I photographed this nebula for two nights, the total integration time is nearly 11 hours.
And here are the stars processed out:
|Rainbow Astro RST 135
|ZWO 174MM, QHY Mini Guide Scope
|ZWO 2600MM @-10°C
|F4.4 Quad Reducer
|Antlia Ha, OIII, SII 3 nm
|129x300s, Gain 100, bin 1x1,