The Lagoon Nebula is located in the constellation of Sagittarius and is spectacular. If you have a 24mm or 135mm lens give this a go as the surrounding dust, density of stars all make for an exceptional framing. I took this from my backyard where my SQM measured at 18.30 near the Austin area. The beautiful nebula was discovered in 1654 by Italian astronomer Giovanni Hodierna and is a magnitude 6! Details :
Filters HSO : 300 s: 14, 17, 20
Linear Processing
- WBPP
- STF
- Perform Linear Fit with Ha as reference; monitoring the HT graph for each image
- Dynamic Background Extraction for each filter
- NoiseXTerminator for each filter
- StarXTerminator for each filter; split workflow for star and starless
- Dynamic Background Extraction
- HDR Process for each filter
- PixelMath combination for RGB:SHO mapping
Non Linear Processing
- Histogram Transformation
- Curves Transformation
- SCNR
- Curves Transformation
- Dark Structures Enhance
Stars
- Histogram Transformation
- Curves Transformation (saturation, little lum adjustments)
Pixel Math Formula for SHO
P.expression = "Sii*1+Ha*0+Oiii*0+Sii*0+Sii*0";
P.expression1 = "Sii*0+Ha*1+Oiii*0+Sii*0+Sii*0";
P.expression2 = "Sii*0+Ha*0+Oiii*1+Sii*0+Sii*0";
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