Cleaned the Astronomik 13nm HA filter and gave it a run with a full Moon.
Canon 5DH, Canon 300mm F2.8 at f/3.5.
Exposures 20x240s at 1600 ISO, fridge at -10.0C.
Full res image with a FOV of 7.0 x 4.6 degrees, 4.5MB
http://d1355990.i49.quadrahosting.co.../velaSNRha.jpg
It should be straightforward to do a mosaic in HA and O3 as there are no coloured gradients to battle with.
The only thing we cannot control is the weather ie clouds.
Bert