A very quick intro to astrophotography

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Ingvar Stepanyan

A 5-min talk on astrophotography basics with a DSLR camera.

Wissenschaft

A very quick intro to
astrophotography
…or one more reason to lose sleep at night
Ingvar Stepanyan (rreverser@)
https://www.instagram.com/rreverser/

Milky Way photography (wide angle lenses)
https://pxhere.com/en/photo/1188031

Meteor showers (wide angle lenses)
https://www.instagram.com/p/CDzQfr0n76F/

Moon (moderate telephoto lenses)
https://www.instagram.com/p/B-0YNHfn8FU/

Planetary photography (longer telephoto)
https://www.instagram.com/p/CCgxBuJHxxt/

Planetary photography (longer telephoto)
https://www.instagram.com/p/CDmsYWrn-bq/

Planetary photography (longer telephoto)
https://www.instagram.com/p/CCgceOHHHgR/

Deep sky photography (moderate to long)
https://www.reddit.com/r/Astronomy/comments/21ck60/the_
apparent_diameter_of_more_objects_compared_to/

Deep sky photography (moderate to long)
https://www.instagram.com/p/CDLokivnsx6/

Deep sky photography (moderate to long)
https://www.instagram.com/p/CCy6xZGHsmq/

Deep sky photography (moderate to long)
https://www.instagram.com/p/CG5XQ-GnVze/

Deep sky photography (moderate to long)
https://www.instagram.com/p/CHzBJ8hHjpA/

Issues (the fun part!)
• Light pollution
• Sensor & lens resolution
• Sensor capacity (max amount of light)
• Sensor noises (random, read noise, dark current, fixed pattern, …)
• Earth rotation (star trailing)
• Weather and atmosphere (glow, fluctuations, clouds, …)
• Photobombing (satellites, planes, birds, …)
• …(couldn’t fit more)…

Light pollution
https://owlcation.com/stem/Light-Pollution-and-How-We-Can-Beat-It

Light pollution
https://www.instagram.com/p/CD7GzygnOLy/

Light pollution
https://nightskypix.com/bortle-scale/

Light pollution
https://www.latimes.com/archives/la-xpm-2011-jan-04-la-me-light-pollution-20110104-story.html

Light pollution
https://www.lightpollutionmap.info/

Light pollution filters
https://www.astropix.com/html/i_astrop/dslr_ha.html

Earth rotation
https://commons.wikimedia.org/wiki/File:All_In_A_Spin_Star_trail.jpg

Earth rotation
500/focal length = max shutter speed in seconds
500/10mm = 50 sec
500/200mm = 2.5sec
(and don’t forget the crop factor)

Earth rotation
Telescopic mounts (shown: some Sky-Watcher model)

Earth rotation
Star trackers (shown: Star Adventurer Mini)

Sensor noises: random noise
https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/astrophotography-gentle-
introduction-noise/

Sensor noises
https://www.photonstophotos.net/Charts/RN_e.htm

Sensor capacity
https://commons.wikimedia.org/wiki/File:Adraga_Overexposed_(7887925504).jpg

Solution: stacking
• AutoStakkert
• SiriL
• DeepSkyStacker
• Sequator
• APT
• PixInsight
• …

Photobombing
https://www.reddit.com/r/pics/comments/1pspbh/long_exposure_of_an_airplane_flying_through_the/

Photobombing
https://twitter.com/djulik/status/1286053695956881409

Sensor noises & vignetting
https://beltoforion.de/en/astrophotography/stacking.php

Sensor noises & vignetting
https://www.reddit.com/r/astrophotography/comments/7apmpb/comparison_of_an_image_with_and_without_dark_and/

Like, share, subscribe, go out and do it!
Ingvar Stepanyan
who/rreverser
https://www.instagram.com/rreverser/

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A very quick intro to astrophotography

1. A very quick intro to astrophotography …or one more reason to lose sleep at night Ingvar Stepanyan (rreverser@) https://www.instagram.com/rreverser/

2. Milky Way photography (wide angle lenses) https://pxhere.com/en/photo/1188031

3. Meteor showers (wide angle lenses) https://www.instagram.com/p/CDzQfr0n76F/

4. Moon (moderate telephoto lenses) https://www.instagram.com/p/B-0YNHfn8FU/

5. Planetary photography (longer telephoto) https://www.instagram.com/p/CCgxBuJHxxt/

6. Planetary photography (longer telephoto) https://www.instagram.com/p/CDmsYWrn-bq/

7. Planetary photography (longer telephoto) https://www.instagram.com/p/CCgceOHHHgR/

8. Deep sky photography (moderate to long) https://www.reddit.com/r/Astronomy/comments/21ck60/the_ apparent_diameter_of_more_objects_compared_to/

9. Deep sky photography (moderate to long) https://www.instagram.com/p/CDLokivnsx6/

10. Deep sky photography (moderate to long) https://www.instagram.com/p/CCy6xZGHsmq/

11. Deep sky photography (moderate to long) https://www.instagram.com/p/CG5XQ-GnVze/

12. Deep sky photography (moderate to long) https://www.instagram.com/p/CHzBJ8hHjpA/

13. Issues (the fun part!) • Light pollution • Sensor & lens resolution • Sensor capacity (max amount of light) • Sensor noises (random, read noise, dark current, fixed pattern, …) • Earth rotation (star trailing) • Weather and atmosphere (glow, fluctuations, clouds, …) • Photobombing (satellites, planes, birds, …) • …(couldn’t fit more)…

14. Light pollution https://owlcation.com/stem/Light-Pollution-and-How-We-Can-Beat-It

15. Light pollution https://www.instagram.com/p/CD7GzygnOLy/

16. Light pollution https://nightskypix.com/bortle-scale/

17. Light pollution https://www.latimes.com/archives/la-xpm-2011-jan-04-la-me-light-pollution-20110104-story.html

18. Light pollution https://www.lightpollutionmap.info/

19. Light pollution filters

20. Light pollution filters https://www.astropix.com/html/i_astrop/dslr_ha.html

21. Earth rotation https://commons.wikimedia.org/wiki/File:All_In_A_Spin_Star_trail.jpg

22. Earth rotation 500/focal length = max shutter speed in seconds 500/10mm = 50 sec 500/200mm = 2.5sec (and don’t forget the crop factor)

23. Earth rotation Telescopic mounts (shown: some Sky-Watcher model)

24. Earth rotation Star trackers (shown: Star Adventurer Mini)

25. Sensor noises: random noise https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/astrophotography-gentle- introduction-noise/

26. Sensor noises https://www.photonstophotos.net/Charts/RN_e.htm

27. Sensor capacity https://commons.wikimedia.org/wiki/File:Adraga_Overexposed_(7887925504).jpg

28. Solution: stacking • AutoStakkert • SiriL • DeepSkyStacker • Sequator • APT • PixInsight • …

29. Photobombing https://www.reddit.com/r/pics/comments/1pspbh/long_exposure_of_an_airplane_flying_through_the/

30. Photobombing https://twitter.com/djulik/status/1286053695956881409

31. Sensor noises & vignetting https://beltoforion.de/en/astrophotography/stacking.php

32. Sensor noises & vignetting https://beltoforion.de/en/astrophotography/stacking.php

33. Sensor noises & vignetting https://beltoforion.de/en/astrophotography/stacking.php

34. Sensor noises & vignetting https://www.reddit.com/r/astrophotography/comments/7apmpb/comparison_of_an_image_with_and_without_dark_and/

35. Like, share, subscribe, go out and do it! Ingvar Stepanyan who/rreverser https://www.instagram.com/rreverser/