[Robert_T]

This is my first serious attempt and imaging using my new Askar 400 but this time with it's pair 0.7x reducer bringing it from 400/5.6 to 280/3.9. Also using the L Extreme filter here.

I decided to focus on the horse-head - originally was going to try and frame both it and M42 and at 280mm I could ft both but it meant both were towards the edges so composition looked off and the edges at F3.9 and using an APSc chip (ASI071) quality is impacted towards the edges.

F3.9 is great for getting detail with shorter subs (though here using 5min subs here as surface detail is pretty faint Total 2hr 15min here), but I'm struck by how much more critical everything becomes at f3.9, focus needs to be perfect to avoid flaring and tilt impacts are exacerbated etc.

Anyway here it is