noctilove
Cygnus with didymium (red enhancing) filter north american nebula, pelecan nebula, butterfly nebula
04
SEP
2013

Cygnus nebulae

This is easily the best astro shot I’ve managed to date. Taken using a combination of the cross filter and the new didymium / red enhancing filter which really draws out the nebulosity in Cygnus. The North America nebula, Pelican nebula and Butterfly nebula can all be seen in this 1000 second (10×100 seconds) exposure.

I’ll probably try the same shot again, but without using the cross filter. I think it can work well in single exposures, but Deep Sky Stacker has a hard time with multiple exposures, and the effect gets a bit too distracting.

Details: Nikon D7000, Nikkor 50mm/f1.8 at f4. 16 minutes 40 seconds (10 x 100 seconds) at iso 800. Using cross filter and didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker.

north american nebula red intensifier

A few days later I had a go at imaging the North America nebula with the Nikkor 18-105mm/f3.5-5.6 lens. I accidentally took the photos as 70mm, so there isn’t much difference to the 50mm; just a lot less light gathering power!

Details: Nikon D7000, Nikkor 18-105mm/f3.5-5.6 at 70mm and f5.2. 18 minutes (12 x 90 seconds) at iso 1600. Using didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker.

Update…

Since purchasing the Nikkor 180 f2.8 lens I’ve had another go at the nebulosity in the Sadr region. I’ve been experimenting with ISO settings, taking this image at ISO 6400. However I think I’ll stick to lower ISOs in the future (1600 and below) as the results at higher ISOs begin to deteriorate.

Cygnus Gamma Cygni Sadr region nebula

Details: Nikon D7000Nikkor 180mm f2.8 at f2.8. 7 minutes (14 x 30 seconds) at iso 6400. Using didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker.

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