Omega Centauri @ 400mm

[dugnsuz]

Enjoyed doing this one, 15min subs and loads of incremental masks for the core.
Cheers
Doug

ps...been experimenting with an external aperture masks to stop down the lens (tight stars / no star spikes) hence the 15min subs.

[dugnsuz]

Mask brings f ratio to somewhere around f8.8 - Yikes!!

[dannat]

Doug IMO you have done well not to burn out the core much seeing as though its only 400mm f/l

[dugnsuz]

Cheers Daniel - used a series of shorter exps to combat core burnout, 30secs through to 5mins.
Doug