A bicolor narrowband DSLR image. With a Baader 2″ Ha 7nm and a Baader 2″ Oiii 8.5nm filters from Bortle 7-8 area of my home. 6 nights in total for 25 hours of exposure!
GEAR USED
D5300 Ha modded
AVX mount
Orion ED80 with 0.85 reducer
ST80/QHY224C quiding
Sharpcap alignment
IMAGE ACQUISITION DETAILS
52 subs × 900s for Ha (dithered)
49 subs x 900s for Oiii (dithered)
25 flats for each
50 bias for each
12 darks for single Oiii session
TAKEN AT
![King City Map](http://astroimaging.ca/wp-content/uploads/2019/09/600x300@2x-6-1024x512.png)
IMAGE PROCESSING
DSS and Pixinsight
Stacked in DSS, processing in Pixinsight
Same steps for Ha and Oiii channels:
– Debayered strong channel extracted
– DBE
– Deconvolution
– MLT
– Histogram transformation
Star alignment of Oiii with Ha image
LRGB Combine:
L: Ha
Red: Ha
Green: Oiii
Blue: Oiii
SCNR
Curves
Unsharpmask
Star Reduction
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