This nebula’s visual angle (visual size) is several times bigger than the visual angle/size of the full Moon; therefore I had to use the shortest focal length I have available. For DSOs like that, I have a small Newtonian telescope with an aperture of 150 mm and a focal length of 600 mm. The focal length was reduced by the ASA reducer to 438 mm.

Heart nebula is very dim DSO; therefore narrow band is a good option to get some contrast. I collected a lot of data for all 3 channels: Ha, OIII, and SII. The final picture was composed in the Hubble palette. This means OIII goes into blue, Ha into green, and SII into the red channel.

Telescope:Newton 150/600 mm
Aperture:150 mm
Focal length:438 mm
MountGemini G53f
AutoguidingZWO 174MM, TS 60/240 mm
Camera:Moravian instruments G2 8300M @-30C
Corrector:ASA 2″ reducer 0.73
Filters:Baader Ha 7 nm, OIII 8.5 nm SII 8nm
Exposure:17xHa, 21xOIII, 25xSII 600 s bin 1×1,
Date:2015-11-09