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Contains:  IC 4605, NGC 6144, rho Oph nebula, IC 4604, IC 4603, M 4, NGC 6121, M 80, NGC 6093, The star τSco, The star ωOph, The star 22Sco, The star Antares (αSco), The star ρOph, The star Al Niyat (σSco), The star οSco, The star 12Sco, The star 13Sco, Part of the constellation Scorpius (Sco)
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Rho - an example of Camera Tilt, 





    
        

            Jonathan W MacCollum
Rho - an example of Camera Tilt

Rho - an example of Camera Tilt

Technical card

Resolution: 4878x3210

Dates:May 13, 2019

Frames: 143x60"

Integration: 2.4 hours

Avg. Moon age: 8.97 days

Avg. Moon phase: 66.52%

Astrometry.net job: 2701554

RA center: 246.744 degrees

DEC center: -26.029 degrees

Pixel scale: 7.605 arcsec/pixel

Orientation: 89.675 degrees

Field radius: 6.167 degrees

Data source: Backyard

Description

After drying out my desiccants to remove the moisture buildup many screws in the camera wouldn't tighten anymore as if they had been overtightened when manufactured. I've worked with zwo support to diagnose the issue and it's now on its way in for repair.

Wanted to share the results of the camera tilt adapter using only two out of the three screws. Notice how uniformly the stars have res halos on the bottom half and blue halos on the top half... Also notice the stars flaring outwards on the bottom two corners and the stars circling around on the top corner.
With the 135mm f2 lens (at f2) this shows the two different mis-focus regions caused by the tilt.

Comments

Author

eigenVector
Jonathan W MacCollum
License: None (All rights reserved)
1770
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Revisions

  • Final
    Rho - an example of Camera Tilt, 





    
        

            Jonathan W MacCollum
    Original
  • Rho - an example of Camera Tilt, 





    
        

            Jonathan W MacCollum
    B

B

Tilt from one screw not being able to tighten.

Sky plot

Sky plot

Histogram

Rho - an example of Camera Tilt, 





    
        

            Jonathan W MacCollum