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Contains:  NGC 7013, NGC 6995, Network nebula, NGC 6992, IC 1340, Veil nebula, Lace-work nebula, Filamentary nebula, NGC 6960, The star 52Cyg
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Cygnus Loop/Veil Nebula - widefield, 





    
        

            Ivan Nair
Cygnus Loop/Veil Nebula - widefield

Cygnus Loop/Veil Nebula - widefield

Technical card

Imaging telescope or lens:Asahi Pentax SMC Takumar 200mm F/4

Imaging camera:ZWO ASI 1600 MM Cool

Mount:iOptron CEM 60

Guiding telescope or lens:ZWO 60mm f/4.6 Guidescope

Guiding camera:ZWO ASI 120MM-S

Filters:ZWO OIII 36mmZWO Ha 36mm

Resolution: 4447x3312

Dates:Aug. 12, 2019Aug. 14, 2019Aug. 20, 2019Aug. 21, 2019

Frames:
ZWO Ha 36mm: 186x240" (gain: 139.00) -10C bin 1x1
ZWO OIII 36mm: 155x240" (gain: 139.00) -10C bin 1x1

Integration: 22.7 hours

Darks: ~20

Flats: ~20

Flat darks: ~20

Avg. Moon age: 16.31 days

Avg. Moon phase: 85.10%

Astrometry.net job: 2875232

RA center: 313.017 degrees

DEC center: 30.930 degrees

Pixel scale: 3.912 arcsec/pixel

Orientation: 303.244 degrees

Field radius: 3.013 degrees

Data source: Backyard

Description

First light (for me!) of a 40 year old, $60 lens from Ebay with narrowband imaging. Without any autofocus, I imaged one filter per night and didn't touch the focus once it started. Unfortunately due to clouds I lost about 2 hours on my OIII images but I think I still had sufficient data.
This was imaged at F/4 but I should have probably used F/5.6 to get better stars

This old lens seems to be excellent for narrowband imaging on a tight budget but may not be very good for LRGB imaging but i'll certainly give it a try sometime.

I went with a slightly different color composition than the standard Red/Blue combination.

Comments

Author

Ivandn
Ivan Nair
License: None (All rights reserved)
1001
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Revisions

  • Final
    Cygnus Loop/Veil Nebula - widefield, 





    
        

            Ivan Nair
    Original
  • Cygnus Loop/Veil Nebula - widefield, 





    
        

            Ivan Nair
    B

B

Obligatory starless variation with Starnet++

Sky plot

Sky plot

Histogram

Cygnus Loop/Veil Nebula - widefield, 





    
        

            Ivan Nair