My little kitten's aperture

Taken during 11 clear nights from Mar 29, till Apr 19, 2009. Visibility of this object from my balcony is limited to about 1-2 hours (moving from trees to the roof), so only 9 hours of expositions gathered for widefield image. Lught-polluted city sky (about 4.0m visual magnitude limit)

Canon 350Da, SkyWatcher Newton 254/1200, EQ6PRO mount.
Guided with 75mm refractor and QHY6CCD, using MaximDL.

Wide:
32 frames x 10 min with Baader UHC-S filter @ISO800
11 frames x 20 min with Baader O-III filter @ISO800

Channels was stacked separately, OIII was added to both Green and Blue UHCS channels, using Signal/Noise-optimized addition (FITs Stacker software made by Ivan Ionov).
Initial processing in Iris, minimal Photoshop post-processing.

Close up image:

Same telescope, but with 2xBarlow (actually worked as 2.3x)

25x30sec @ iso800

25 best frames selected from 51 frame sequence by FWHM.
Initial processing, fwhm-selection, color balance, wavelets by Iris. Photoshop for post-processing (saturation and additional sharping) Final sum's FWHM is about 2.1".