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An update nobody asked for: after some back and forth with ZWO, I decided to buy a led tracing pad from amazon, cheap, it was around 20 dollars, and to my suprise it actually calibrates the gradient out! no trace of it, im really happy as I was still stressing about this.
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Great news,
maybe put up some of your new files for other 294mc owners to see and your workflow of course. 👍
Another ASI 294mc tamed 😉
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Padraig Farrell:
Great news,
maybe put up some of your new files for other 294mc owners to see and your workflow of course. 👍
Another ASI 294mc tamed 😉
I will post as soon as I get some clear skies! Cant wait to finally have it work correctly
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Good stuff,
I’d take any clear spell I get at the moment,
or I end up a professional collimator and mirror cleaner. 🤪
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this is how the gradient used to be, vs how it is now after taking flats with a tracing pad. (Still have some vignetting in the corners but I got to figure that one out now)  |
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Massive improvement
As for the vignetting …and this just a guess…
was the light pad placed on top of the OTA at a low light output setting?
If so .…maybe try if at full with a few layers of white material ( t-shirt/ table cloth ).
There might be a fall off of light intensity at the edges from the pad at a low setting. ?
Myself, I point the OTA at a white wall , illuminated by the sketch pad to get + 4 seconds at 45 to 50 histogram.
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Padraig Farrell:
Massive improvement
As for the vignetting …and this just a guess…
was the light pad placed on top of the OTA at a low light output setting?
If so .…maybe try if at full with a few layers of white material ( t-shirt/ table cloth ).
There might be a fall off of light intensity at the edges from the pad at a low setting. ?
Myself, I point the OTA at a white wall , illuminated by the sketch pad to get + 4 seconds at 45 to 50 histogram.
The light was bright but with a shirt and white paper on top of the scope, i was thinking it could be the fact that I took it without the dew shield on? just with the dew shield down completly, since ive noticed my scope, the WO z61ii has a little bump around the glass which couldve cost vignetting? not sure. But when I get home from work I will be testing.
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1.51
1.20
