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Mars and Pleiades Canon 80D at 135mm back in March

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#1 aatdalton

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Posted 24 June 2019 - 06:23 PM

I was able to capture this back on March 4th as Mars passed near the Pleiades. Acquisition info below.

 

Pleiades and Mars.jpg

 

Setup:

  • Camera: Stock Canon 80D
  • Lens: Sigma 70-200mm f/2.8 USM @ 135mm and f/5.0
  • Tracker: SkyWatcher Star Adventurer on Manfrotto tripod
  • Accessories: dew heater on lens, DIY Bahtinov mask courtesy of a Folgers can, remote shutter release

Acquisition:

  • Lights: 83 x 147" at ISO 200 into DSS, best 80%  =  66 stacked, **1 hour 37 minutes total integration**
  • Darks: 32 x 147”
  • Bias: Master bias
  • Flats: White T-shirt method x 32

Editing:

  • Sorted and rejected shots in Lightroom.
  • Stacked best 80% in DSS
  • Imported to PS
  • Crop out bad edges
  • 32->16 bit
  • lots of incremental levels adjustments
  • set gray point in levels with 11x11 color picker
  • curves
  • create synthetic flat by removing targets and using Dust and Scratches filter, apply to image - subtract, masked out some areas
  • more curves and levels
  • saturation and vibrance
  • save 16 bit tiff
  • Import back into Lightroom
  • aesthetic adjustments like slight color tweak, highlights, clarity, noise reduction, final crop
  • export jpeg

This was a really fun project and I was surprised at how well it turned out!


  • psandelle, SandyHouTex, Alen K and 7 others like this

#2 t-ara-fan

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Posted 24 June 2019 - 06:44 PM

ISO 200

Is the 80D one of those cameras that has low read noise at low ISO?  Giving nice dynamic range?



#3 aatdalton

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Posted 24 June 2019 - 07:01 PM

Is the 80D one of those cameras that has low read noise at low ISO?  Giving nice dynamic range?

It is! One of the only Canons that performs like that for some reason. Most other Canons are best around ISO 1600. Weird concept for me to get my head around at first. 



#4 SandyHouTex

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Posted 24 June 2019 - 08:36 PM

It is! One of the only Canons that performs like that for some reason. Most other Canons are best around ISO 1600. Weird concept for me to get my head around at first. 

The 77D, 80D, SL3, and T7i (which I just bought) all have the new low noise Canon sensor.




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