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Unitron 510 Notes

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#251 jgraham

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Posted 07 July 2024 - 05:44 PM

M13 – Globular Cluster in Hercules
Telescope: Unitron 510 5” f/16 refractor, Stock
Camera: Canon EOS Ra full frame DSLR
Filter: 2” Baader Fringe Killer (minus violet)
Guide scope: None
Exposure: 111x1sec, ISO 16,000, saved as RAW
Darks: Internal (Long Exposure Noise Reduction)
Flats: 64x1/100s sky flats taken at dusk
Average Light Pollution: Bortle 8, fair transparency
Lensed Sky Quality Meter: 18.6 mag/arc-sec^2
Stacking: Mean with a 1-sigma clip
White Balance: Nebulosity Automatic, Photoshop
Software: Backyard EOS, Deepsky Stacker, Nebulosity, Photoshop

 

M13 (6-29 & 30-2024)-1j.jpg

 

This is the first of three test images taken with my Unitron 510 in its original stock configuration. The source images were acquired over two evenings,  46 on 6/24 and 65 on 7/30. These represented approximately 60% of the source images and were selected manually from the source files.


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#252 jgraham

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Posted 07 July 2024 - 05:45 PM

M92 – Globular Cluster in Hercules
Telescope: Unitron 510 5” f/16 refractor, Stock
Camera: Canon EOS Ra full frame DSLR
Filter: 2” Baader Fringe Killer (minus violet)
Guide scope: None
Exposure: 105x1sec, ISO 16,000, saved as RAW
Darks: Internal (Long Exposure Noise Reduction)
Flats: 64x1/100s sky flats taken at dusk
Average Light Pollution: Bortle 8, fair transparency
Lensed Sky Quality Meter: 18.6 mag/arc-sec^2
Stacking: Mean with a 1-sigma clip
White Balance: Nebulosity Automatic, Photoshop
Software: Backyard EOS, Deepsky Stacker, Nebulosity, Photoshop

 

M92 (6-24_7-1-2024)-1j.jpg

 

This is the second of three test images taken with my Unitron 510 in its original stock configuration. The source images were acquired over two evenings,  28 on 6/24 and 77 on 7/1. These represented approximately 60% of the source images and were selected manually from the source files.


  • deSitter, steve t, combatdad and 2 others like this

#253 jgraham

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Posted 07 July 2024 - 05:46 PM

M57 – The Ring Nebula in Lyra
Telescope: Unitron 510 5” f/16 refractor, Stock
Camera: Canon EOS Ra full frame DSLR
Filter: 2” Baader Fringe Killer (minus violet)
Guide scope: None
Exposure: 254x1sec, ISO 16,000, saved as RAW
Darks: Internal (Long Exposure Noise Reduction)
Flats: 64x1/100s sky flats taken at dusk
Average Light Pollution: Bortle 8, fair transparency
Lensed Sky Quality Meter: 18.6 mag/arc-sec^2
Stacking: Mean with a 1-sigma clip
White Balance: Nebulosity Automatic, Photoshop
Software: Backyard EOS, Deepsky Stacker, Nebulosity, Photoshop

 

M57 (6-24_30_7-1-2024)-1j.jpg

 

This is the last of three test images taken with my Unitron 510 in its original stock configuration. The source images were acquired over three evenings,  76 on 6/24, 21 on 6/30, and 157 on 7/1. These represented approximately 60% of the source images and were selected manually from the source files.


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#254 jgraham

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Posted 07 July 2024 - 05:47 PM

So, imaging with the stock Unitron 510 is quite doable when paired with a modern camera and processing techniques. The key element is taking a relatively large number of very short exposures using a high gain followed by manually selecting the best source images, stacking, and careful processing. I have now successfully imaged with the Unitron 142, 155, and the 510, with the relative challenge increasing in that order largely due to the increasing weight and focal length of the telescopes. However, none of these were particularly difficult once the process was smoothed out and all have proven to be excellent imaging platforms giving exceptionally flat, well corrected fields.


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