Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  Extremely wide field
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Cepheus Widefield, 



    
        

            Wes Schwarz
Cepheus Widefield
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Cepheus Widefield

Getting plate-solving status, please wait...
Cepheus Widefield, 



    
        

            Wes Schwarz
Cepheus Widefield
Powered byPixInsight

Cepheus Widefield

Equipment

Imaging Telescopes Or Lenses
Samyang 135mm f/2
Imaging Cameras
Sony A7rIII
Mounts
Celestron CGE
Software
PixInsight 1.8 · Adobe Photoshop CC 2020
Guiding Cameras
ZWO ASI 290MM

Acquisition details

Dates:
Nov. 2, 2019
Frames:
23x180" (1h 9') ISO1600
60x60" (1h) ISO1600
4x600" (40') ISO640
Integration:
2h 49'
Darks:
23
Flats:
70
Bias:
300
Avg. Moon age:
5.59 days
Avg. Moon phase:
31.37%
Bortle Dark-Sky Scale:
4.00
Mean SQM:
21.40
Mean FWHM:
3.00
Temperature:
-1.00

Basic astrometry details

Astrometry.net job: 3698465

RA center: 20h49m05s.5

DEC center: +58°0108

Pixel scale: 7.134 arcsec/pixel

Orientation: 258.036 degrees

Field radius: 9.381 degrees

Resolution: 7860x5280

Data source: Traveller

Description

Here is a widefield image that I took back in November of Cepheus. I was test running the unmodified Sony A7R3 with the Samyang 135mm f2. My adapter needs some tweaking to get the corners just right, or maybe its time to get a good EF-FE adapter like the MC-11. I like the camera, it has about a quarter of the noise observed in the 550d and alot more dynamic range at each iso, and of course more than double the resolution. I was concerned about star eater in my individual subs, but I dont think its an issue after stacking the data, these stars are much larger than a single pixel at 135mm of focal length.

Exposures

4 x 600s iso 640

60 x 60s iso 1600

23 x 180s iso 1600

SQM - 21.3

Comments

Sky plot

Sky plot

Histogram

Cepheus Widefield, 



    
        

            Wes Schwarz