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M51, Canon 77D, 2hrs

 Posted: Mar 15th, 2026
Technical Info
Telescope/Lens: Sky-Watcher ED80
Camera: Canon 77D
Mount: HEQ5 Pro
Software: MaximDL
Exposure:
22 x 300" ISO/Gain: 500
 Sofrino,
 Apr 23rd, 2017
1 h 50 m
4
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Resolution: 2147x2057 px
Scale: 524 KB
ankorot
30
An "old" image (2017), taken using older techniques—a standard, unmodified Canon 77D on an ED80 tube with a flattener.

Focal length = 510mm.

The Heq5 Pro still had gears and was constantly jerky.

5 minutes of exposure per frame. How did I manage to shoot 5-minute exposures? It's unclear. I wouldn't risk it like that now.
Updated
M51, Canon R6 mark II, 30 sec X ISO1000, 2.6 hrs
  Today, at 21:28
  2 h 42 m
What happens when shooting with high ISO and short exposures compared to low ISO? (total imaging time is the same)This frame is "low ISO and long exposures," th…
M51, Canon R6 mark II, 10 sec X ISO4000, 3hrs
  Today, at 21:21
  2 h 50 m
What happens when shooting with high ISO and short exposures compared to low ISO? (total shooting time is the same) This frame uses "high ISO and short exposure…
Current photo
M51, Canon 77D, 2hrs
  Today, at 21:01
  1 h 50 m
An "old" image (2017), taken using older techniques—a standard, unmodified Canon 77D on an ED80 tube with a flattener. Focal length = 510mm. The Heq5 Pro still…
M51, RASA 8", 4 hrs (no filter)
  Today, at 20:56
  4 h 6 m
First test of the Player One Poseidon-C on an RASA 8" tube. A crop of the central part. (The camera is here, but there are no objects for it in the spring.)
M51, RASA 8", 4 hrs (no filter)
  Today, at 20:51
  4 h 6 m
First test of the Player One Poseidon-C (large APS-C sensor) on a Celestron RASA 8" telescope. No filters used, which was a mistake—this caused large star halos…
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