Hemisphere:  Northern  ·  Contains:  Double cluster  ·  IC 1805  ·  IC 1848  ·  NGC 281  ·  NGC 7822  ·  NGC 869  ·  NGC 884  ·  NGC 896  ·  The constellation Cassiopeia (Cas)  ·  The star Caph (βCas)  ·  The star Navi (εCas)  ·  The star Ruchbah (δCas)  ·  The star Schedar (αCas)  ·  The star γCas  ·  The star ζCas  ·  The star ηCas  ·  The star ηPer  ·  The star τPer  ·  The star φPer
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Cassiopeia Region - Widefield, 


            Pat Darmody
Cassiopeia Region - Widefield
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Cassiopeia Region - Widefield

Technical card

Imaging telescopes or lenses: Canon EF 40mm f/2.8 STM

Imaging cameras: Canon 550D (T2i) modded

Mounts: Celestron Advanced VX

Software: PixInsight 1.8  ·  Binary Rivers BackyardEOS v3

Filters: CLS-CCD

Accessory: AstroZap Dew Heater Straps  ·  Celestron SCT Camera Piggyback Bracket  ·  Kendrick Standard Dual Channel Dew Controller  ·  Celestron Polar Axis Finderscope  ·  Oben BA-113 Ball Head

Dates:Dec. 19, 2015

Frames:CLS-CCD: 44x60" ISO800

Integration: 0.7 hours

Darks: ~4

Flats: ~30

Bias: ~40

Avg. Moon age: 8.32 days

Avg. Moon phase: 59.87%

Bortle Dark-Sky Scale: 5.00

Temperature: 6.00

Basic astrometry details

Astrometry.net job: 893592

RA center: 1h 3' 48"

DEC center: +60° 48' 18"

Pixel scale: 22.805 arcsec/pixel

Orientation: -3.239 degrees

Field radius: 19.480 degrees

Resolution: 5130x3396

Locations: Home, Arnold, MO, United States


This is my first light shot with my new EF 40 mm f/2.8 STM lens (mounted piggy back on my 8se, using the Oben ball head).

It is also my first attempt at using an in camera custom white balance (CWB), in an attempt to reduce the red/pink color casts in many of my stars. Even with the CWB, shot using a grey card, and careful attention to the Color Calibration module in PI, it is still very difficult to get the red out of the small/medium sized background stars (larger stars seem to show their correct colors without much trouble). I'll probably end up posting something about this on the PI forum.

All in all, I am happy with the result, and very pleased with the 40 STM lens. I was fighting a first quarter moon and a lot of high level haze to get these frames. So, I was very glad to be able to catch so many DSO's in one shot.

Thanks for looking!



Pat Darmody
License: None (All rights reserved)

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Cassiopeia Region - Widefield, 


            Pat Darmody