Narrowband Cygnus – again!

Staying with the Cygnus and narrowband theme, here’s last nights effort. This was taken on the Atik 314L+ through an old 50mm f/1.7 Pentax lens stopped down to f/2.8, and used 10 x 3min Ha, 11 x 3min OIII, but I only got 4 x 3min SII before the cloud rolled in. Processing for this was done in AstroArt and Photoshop.

Cygnus SII_Ha_OIII 

Wide angle photography

A while ago now I acquired a Geoptik adapter to fit Canon lenses directly to the Atik, the beauty of this adapter being that 1.25″ filters can be used with it. I was able to connect my 200mm Canon and 105mm Sigma lenses to it OK, but wider angle 50mm and 28mm lenses couldn’t be brought to focus. In my lens collection are a couple of old Pentax K bayonet lenses  – a 28mm f/2.8 and a 50mm f/1.7; I got a cheap Pentax K to Canon adapter, and last night tried these lenses out on the Atik. The 28mm wouldn’t focus, but the 50mm was fine 🙂

These are two quick images that I took. The first is a region of central Hercules which includes M13, just right of centre; it’s a stack of 6 x 2min exposures at f/4 through an Astronomik CLS filter. The second is of the region aroun the North America and Pelican nebulae, and is a stack of 10 x 2min exposures, binned 2×2, through a hydrogen alpha filter. Accurate focusing is a lttle tricky, but the results are good enough to persuade my to try further with this lens.


North America Nebula

At this time of year, as it never really gets dark, it’s best to keep to the brighter DSOs – at least that’s my excuse! Included in this post are two views of part of the North America Nebula, taken through the 80mm f/6 Equinox with the Atik 314L+. It’s a stack of 12 x 5min frames through a Baader 7nm Ha filter, and shows a lot of detail in the nebula.

I then took 6 x 1min each RGB frames, binned 2×2 to add colour. The colour image is perhaps less successful, mainly because of the blue haloes around the brighter stars; images through the blue filter were noticeably more bloated than through the red and green.

The North America Nebula – again!

The moon was up, and washing everything out somewhat, but having got my SCT somewhat close to collimated – good enough for guiding, at least – I thought I’d have a play around with NGC7000 again.
This is a combination of 13 x 2 min and 6 x 4 min exposures at ISO 800, taken through the Equinox ED80, captured and processed with Images Plus and Adobe Lightroom.

A bit more exposure would have helped, but I was quite pleased by how much detail I was able to tease out of it, nevertheless. Guiding worked flawlessly, possibly helped by the fact that I’d spent a bit of time improving my polar alignment.

More Cygnus

As we had another couple of hours of clear skies last night, I decided to capture dome more of the Cygnus region. The image below has combined the 15 exposures from Wednesday evening with another 20 from last night, and appears to have brought out a bit more detail in the areas of faint nebulosity, as expected. Total exposure time for this image is now 70 min at f2.8, ISO400.