Horsehead to the Sword, 


            Callum Hayton
Horsehead to the Sword, 


            Callum Hayton

Acquisition details

Feb. 28, 2014
80×120(2h 40′)
2h 40′
Avg. Moon age:
28.57 days
Avg. Moon phase:

Resolution: 4590x1977

File size: 5.4 MB


Never planned on making this a mosaic really, hence the different exposure settings for each pane. After a couple stretches in PS it became apparent that the difference in ISO, f ratio and over all exposure time were going to make it quite tough to process so i ended up being a bit careless and not putting as much effort in as i perhaps should of! But it will do until i can make a fresh start on a similar image, perhaps including M78 off to the left.

Exposure for left:

50* 180 seconds, f3.2, ISO 800, calibration frames, 200mm

Exposure for right:

29* 120 second exposures, f2.8, ISO 1600, calibration frames, 200mm

Individual images:

Horsehead -

M42 -



Horsehead to the Sword, 


            Callum Hayton