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Contains:  NGC 4627, NGC 4631, NGC 4656, NGC 4657, Whale Galaxy
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A Whale and a Crow Bar, 


            Benjamin Olry
A Whale and a Crow Bar
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A Whale and a Crow Bar

Technical card

Imaging telescopes or lenses: Meade SN-8

Imaging cameras: Sony a7rII astro modified

Mounts: SkyWatcher NEQ6

Guiding telescopes or lenses: Orion 50mm Guidescope

Guiding cameras: Lacerta MGEN 2

Focal reducers: TeleVue ParaCorr PLU1106

Software: Aries Productions Astro Pixel Processor APP  ·  Adobe Lightroom Classic CC  ·  Adobe Photoship CC 2018

Filters: Optolong L-Pro 2"

Dates:May 14, 2020

Frames:Optolong L-Pro 2": 78x300" ISO640

Integration: 6.5 hours

Darks: ~16

Flats: ~25

Avg. Moon age: 22.07 days

Avg. Moon phase: 50.87%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details job: 3520663

RA center: 12h 42' 49"

DEC center: +32° 19' 40"

Pixel scale: 1.805 arcsec/pixel

Orientation: 339.543 degrees

Field radius: 0.757 degrees

Resolution: 2560x1600

Data source: Backyard


This is the first light for my Astro modified Sony A7rII. It is not the perfect camera for astro but I found my way around some issues to make it work.



Benjamin Olry
License: None (All rights reserved)


  • Final
    A Whale and a Crow Bar, 


            Benjamin Olry
  • A Whale and a Crow Bar, 


            Benjamin Olry


Description: The no crop version is also uploaded

Sky plot

Sky plot


A Whale and a Crow Bar, 


            Benjamin Olry