Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  Extremely wide field
M31 - Andromeda, Egg
M31 - Andromeda
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M31 - Andromeda

M31 - Andromeda, Egg
M31 - Andromeda
Powered byPixInsight

M31 - Andromeda

Equipment

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Acquisition details

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Description

Samyang 135mm F2 @ F2

A7s @ ISO2000

Vixen Polarie mount

Skywatcher EQ wedge

266 x 30sec - silent shutter mode

Linear processes:

No Mask:

Dynamic crop

DBE

Background neutralisation

Colour Correction

Create luminance mask:

RGB to luminance

histogram transformation to linear image

Masked with inverted LumMask:

MultiscaleMedianTransform for noise reduction



Masked with normal LumMask:

MultiscaleMedianTransform for sharpening, detail bias of 1,2,4 px structures tweaked.

Create Starmask for star reduction:

RGB to luminance

MultiscaleMedianTransform with 1,2,4 px structures enabled, Residual structures disabled.

histogram transformation to non-linear image



Masked with Starmask:

Erosion Morphalogical transform

No Mask:

Masked Strech

Non-Linear processes:

No Mask:

Contrast enhancement with curves adjustment.

Export to Tiff

open in photoshop and export for web.

Scale down to longest edge 2000px for Facebook.

Comments

Sky plot

Sky plot

Histogram

M31 - Andromeda, Egg