# 16 Oct, 2019 13:33
Due to health issues I am no longer able to take the long drive out of town to my Bortle 4 sky location and now must settle for a Bortle 6 location near my home. I had a guided EQ mount, but now I have just a Star Adventurer tracker and will be doing only widefield astrophotography. I love inter-stellar dust and hope to image targets like M45 to California nebula, Orion and surroundings, etc., and be able to show lots of space dust. I use an unmodified Nikon D5500 but have been able to get great colours and detail when I had enough total integration. I use Pixinsight and Photoshop and I'm not too bad at post processing so if the subtle dust and details are in the raw image I can usually tease them out fairly well.
1. At this new Bortle 6 location will I be able to match or come close to my previous imaging results, especially when it comes to revealing dust?
2. Will this simply be a matter of adding more integration time by increasing the length of subs and/or shooting more subs?
3. Anything else I should know or do in order to optimize my results from the Bortle 6 site?
Thanks very much,
# 16 Oct, 2019 18:18
Use LPF filters.
You may need to have higher iso.
# 16 Oct, 2019 20:16
I hope you get better soon and enjoy again your darker skies!
Till then, you can plan to image objects near your local zenith using a longer focal length. And since you are a PixInsight user, master well the Dynamic Background Extraction (DBE) process. I image from Bortle 5 skies. When imaging below 45° local altitude, most of my processing time is spent on DBE. Above 45° and during dry and transparent nights, I may be lucky and get away with a pass of a low-order Automatic Background Extraction process
Don't give up!
# 17 Oct, 2019 01:57
|It is going to take a lot more time, or use a faster scope/lens. The difference from 4 to 6 is very large.|
# 17 Oct, 2019 11:46
If you are coming from Bortle 4 you will find this new situation quite annoying and just checking your gallery, you wont be able to keep the same quality.|
According to my needs and few years experiences under Bortle 7 and 4,
- RGB imaging works for me over SQM 20 with LPS filters and near to 21 and above w/o filters
- Between SQM 17-20 I use only NB with a mono camera or maybe UHC, semi-UHC close to SQM 20.
You can check your place on the SQM map or measure it yourself.
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