NGC 6992 (Veil - part of)

[fwm891]

Hi - Been trying out the DSLR chiller again and captured 5 x 10 min subs of NGC 6992.

Details:

Altair Astro 8-inch f4 Newtonian with Baader MPCC corrector, Baader UHC-S filter, Canon 450D (self mod-full spectrum) shot at ISO 800 on NEQ-6 Pro mount guided using Helios st80 + QYH5 + PHD. EQMOD.

Sub frames combined, with darks, flats, bias and flat/darks in DSS and tweaked in PS CS3.

These images were a trial of the chiller which had taken the camera body to 16º C below ambient (about 1º-2º C) on the night following a pre-cool in the fridge for about 3 hours to make sure the camera was cooled right through.

I had also been playing with the scope configuration and had run 2 iterations with EQ-Align 2 to reestablish correct polar alignment as on my previous session PHD was asking the mount for some hefty corrective steps which had cause some frame to multi image on the same frame where things were skipping!

Hope you like...