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SH2-105 (NGC 6888, Crescent Nebula)

Emission nebula in Cygnus.
Click on the images for a full scale version.

H-Alpha, OIII, Continuum

SH2-105
Color mapping:      Red: H-Alpha + Continuum      Green: OIII + Continuum      Blue: OIII - H-Alpha + Continuum

Image data:

FOV: 0.62° x 0.47°
Date: 2018
Location: Pulsnitz, Germany
Instrument: 400mm Newton at f=1520mm
Camera Sensor: Panasonic MN34230
Total exposure times:
H-Alpha (3nm): 2.8 hours
OIII (3nm): 2.9 hours
NIR (as continuum): 0.7 hours
Remarks: Artifacts in OIII due to a defect filter
Image processing:
  1. Continuum subtraction
  2. Deconvolution
  3. Color composition
  4. Dynamic range compression
  5. continuum addition
  6. Tonal correction
Only deterministic image processing (no manual retouching) and no saturation enhancement after color composite.