M51, RASA 8", 4 hrs (no filter)

Mar 16th, 2026

4 h 6 m

Stacked with Drizzle 2x In this same "stack" (group), there is also a result stacked with Drizzle 1x. You can compare them. Everything else is the same:RASA 8", NINA, phd2 PixInsight: WBPP, SPCC, noiseX, blurX, crop (important!), MAS, starX, a bit of sharpening (gentle LHE at 17,55 and 111) via a mask.

Mar 15th, 2026

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," though on a good camera body. A crop of the central part. Right next to it is a frame from a different camera body—a Canon 77D—where exposures had to be 5 minutes long to see anything. Here, 30 seconds and everything looks fine.

Mar 15th, 2026

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 exposures," though on a good camera body. Crop of the central part. You can compare it here with a frame that has one difference—a different camera body: here it's a Canon R6 MK2, while the adjacent frame is from a Canon 77D.

Mar 15th, 2026

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 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.

Mar 15th, 2026

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.)

Mar 15th, 2026

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. A UV/IR cut filter must be used; it's impossible to operate this telescope without a filter. (Celestron are quite the jokers—their telescope can't be used without filters, yet there's no standard way to mount them.)