Messier _55

One hour of integration-two minute subs-Bortle 6 location-moonless night

 

Redcat51/ZWO183MC/Optolong UV/IR filter/ASIAIR/HEQ5

 

Stacked in APP/processed in PixinSight/minor touches in Photoshop CS6

 

Processing steps in PI

 

Dynamic Crop

Background extraction-GraXpert

Image solver

SPCC

BlurX-Correct

BlurX Default

Noise X

GHS

HDR-layer 4

GHS

Starnet++

 

1. Star layer

 

SCNR-twice-once on inverted image -if there are halos on bright stars

Invert back after SCNR

Process>StarMask>Create Mask

Apply to image

Curves-increase saturation

Delete mask

 

2 Starless

 

SCNR

Range Mask

 

Increase Saturation

Remove mask

Adjust blackpoint in GHS tool

 

 

3 Combine using PixelMath

 

~((~stars)*(~starless))

 

4 slight boost to vibrance in Photoshop

 

 

 

Done