IC1396 narrowband a start for a colour project

[Velvet]

Tak 106 reduced

Ha Filter  7.5 hours in 10 min subs unguided

QSI 690 wsg-8

 

[simmo39]

V nice start.

[Velvet]

thank you  

[Pompey Monkey]

Lovely contrast in that image. However, the stars are looking a little bloated, and the image a little soft, compared to what I'd expect to see from a Tak on a 10 Micron mount. Is your focus spot on?  

[Velvet]

as far as i could tell with the bhatinov it was well focused ?  

[Pompey Monkey]

The FWHM script in PI gives a measure of 1.7 pix in your image. Astrometry.net shows a pixel scale of 3.5" per pixel. This gives an average FWHM of about 6".

I live right by the sea-side with all the associated rubbish seeing and I get 3.5"-4.5" FWHM for my Ha stacks.

Do you use any software to help you pin the focus with the Bahtinov? I've found that doing it by eye alone just does not cut it. I use the Bahtinov aid in APT, but other software solutions are available

[swag72]

Have you done any NR reduction on this in processing? 

[Velvet]

I just used bhatinov by eye so perhaps need to look at that. And yes some NR reduction with actions in PS?

[swag72]

I asked about the NR as the first thing that I noticed when I looked at this image was it's smoothness........ Would be good to see one posted without