I think Iāve found a temporary workaround for myself - using 20s / 30s exposures.
Yes, under ideal conditions (no clouds and no wind, since Iām shooting from a balcony) I lose roughly 10+ % at 20s, but thatās still better than nothing.
One thing I want to point out is that Iām shooting under relatively poor urban skies (Bortle 6ā7), and this works for me. If you have good dark skies (for example Bortle 3) Iām afraid you may still see these black pixels even at 20s. In your case, 30s+ exposures might work better.
I rule out temperature as the root cause, because I took 10s frames when the sensor temperature was +18 Ā°C, and later when the sensor temperature dropped below +10 Ā°C (with the outside temperature around ā8 Ā°C). The number of black pixels did not decrease.
From what I understand, the issue is likely somewhere in the part responsible for āimage enhancement,ā which seems to run either before each imaging session starts or when you switch to an exposure length that hasnāt been used since the telescope was powered on.
Below, I hope to add a visual example showing how my images look at 2s / 10s / 20s exposures.
https://bbs.zwoastro.com/assets/files/2026-01-22/1769111735-586600-s50.jpg
Taken on 3.0.2 app and v6.70 FW
cc: @support@Seestar
