This was the Deep Sky object for September - a planetary nebula in Cygnus. The challenge is, its pretty small (40 arcsec or so along larger axis) so showing structure may be tricky; the image here is fairly tight crop of a much larger original.

It is however quite bright and I just managed to avoid complete saturation with my normal 300s subs. However some of the bright stars do saturate, in particular the bright one right alongside (hence small artefact in the centre). If I did this again, I think I would do many more 60 subs instead.

I took some Luminance on 3rd September, then completed with further LUM and RGB on the 5th. [Acquired in Voyager and processed in Pixinsight (PI)]

Teasing out the structure required careful use of deconvolution in Pixinsight - this is usually a multi-iteration step before stretching but I also did a couple of iterations afterwards for good measure - I think it has helped.

For colour calibration, I used PIs Photometric-based tool. This compares your (plate solved) image with a catalogue of spectral qualities of the stars in your field. The result should therefore be fairly accurate. However, there is very little colour in the nebula itslef. To draw out what there, is I have increased the saturation of the image quite  a lot. The Hubble image online shows a nice mix of blue and red, but I think this is narrowband with Nitrogen and Oxygen filters. I dont have a Nitrogen filter but could be worth trying with Ha?