Clipped/noisy subs - Possible FITS pedestal/black-level regression: Page 12

Clipped/noisy subs - Possible FITS pedestal/black-level regression

YXEMachinist

Support@Seestar are you still offering the beta firmware?

wVU1j6V6

Support@Seestar I'm not sure I can see my S30 dithering actively in 3.1.0 (11), like it did before, jumping in all directions 50 pixels or so every 5 frames taken, instead i see image slowly drifting sideways. I'm watching it work in continious capture mode (in AltAz) right now like that. Is that a new feature?

wVU1j6V6

I've made a zoomed-in timelapse of approximately 100 frames taken with continious capture in Az mode. It stopped wandering around like it did before, no noticeable dithering moves now, and drifts to the right slowly.
Is it dithering like 1 pixel now? Not even sure if it's trying at all, maybe those micro-movements are just tracking errors.

img-9524.mp4

6MB

wVU1j6V6

Yeah, it’s not dithering at all in continuous mode, but seems okay in live stacking
I have walking noise all over the stacked continuous capture image later.
Seems like a new issue.

3AC9bx99

V3.1.0 has now been released. Has this fixed the clipping problem? I'm not able to test it in real conditions so far due to cloudy weather.

Lilo

No skies here therefore just a quick dirty dark room test. Yes, I know I better use .fits for histogram. But don't have a PC at hand. So, only a jpeg on my Android phone for now. And it looks promising. 10s subs before and after the recent update, S50.

3AC9bx99

Looks very promising. ZWO have replied they have fixed the fault, always good to show this with real data. Looking forward to my next clear skies. Let's hope this fix has not led to problems elsewhere!

Rob603

I was able to test 3.1.0 last night on my S50 and can confirm the histogram clipping has been fixed. Also the DBE seems to be working much better. I did 60 minutes in EQ mode on Thor’s Helmet and it was a very clean looking stack.

I recommend everyone redo their dark pixel calibration and reshoot their flat field since this update is going to give significantly better imaging results. Thank you ZWO for fixing this!

bakosmi

Rob603 is the recalibration needed? I would expect if it would, ZWO should tell us right ?

3AC9bx99

Rob603 Looks a good image for a low declination object. Many thanks for posting this to confirm no histogram clipping. Out of interest what exposure time did you use?

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