First, here is the screen shot: https://imgur.com/DpsREYu Second Screen shot with grainy pic: https://imgur.com/loBDU3C
As you can see the left side of the image is very bright. If I adjust the black level to make it disappear, the image gets very grainy. If I adjust the mid level, everything is washed out. Any idea what is causing this? I do have street light in front of my house, but I have me scope set up in the back. The scope can't "see" the street light because it is blocked by my back porch. Could this be light from the street light? Or am i doing something wrong in the app? I am a beginner at this. Any insight would be appreciated.
Why is the left side of my live stack so bright?
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Re: Why is the left side of my live stack so bright?
Hi,
it looks to me for a light leak or straylight.
From the provided picture I can see that the cam is a ASI294MC. I also noticed a strong drift and field rotation in the stacked image and that you do not save single images. Looking into the single files could help to detect, whether this illumination happend once / in a while / or constantly.
It would be also helpful to know the scope you use. A Mak or SC is prone for straylight if not using a shield. Newtonians are different beasts. Usually the back of the main mirror is uncovered and any brighter light source from behind gives strange reflections. Newtonians with a tubular frame are open for any straylight if not protected with a cover.
Gottfried
it looks to me for a light leak or straylight.
From the provided picture I can see that the cam is a ASI294MC. I also noticed a strong drift and field rotation in the stacked image and that you do not save single images. Looking into the single files could help to detect, whether this illumination happend once / in a while / or constantly.
It would be also helpful to know the scope you use. A Mak or SC is prone for straylight if not using a shield. Newtonians are different beasts. Usually the back of the main mirror is uncovered and any brighter light source from behind gives strange reflections. Newtonians with a tubular frame are open for any straylight if not protected with a cover.
Gottfried
TS Photoline 60/360, TS Photon 150/750 Advanced Newton, Bresser 90/500 & MC 127/1900, ZWO ASI120MC-s, Player One Neptune-C, Altair Hypercam 294C Pro, SVBONY SV165 Guidescope, iOptron Cube Pro & CEM25P, Bortle 4, Germany-northwest region
Re: Why is the left side of my live stack so bright?
Thanks for the info. I have a Skywatcher Virtuoso GTI 6" Dob.
Re: Why is the left side of my live stack so bright?
Thx for the info.
A Flextube. You definitely need a so called light shroud. Check here pls as an example https://astrozap.com/collections/light- ... ght-shroud
Unfortunately, all of them start with 8". But, I'm pretty sure you can DIY or get one custom made by your local tailor
Flextubes are great, but prone for straylights and other influences like dust, dew and other stuff. For visuell observations mostly ok, but a astrocam can capture more than the human eye, even straylight (i.e. from the Laptop or Smartphone screen beside your scope).
Gottfried
A Flextube. You definitely need a so called light shroud. Check here pls as an example https://astrozap.com/collections/light- ... ght-shroud
Unfortunately, all of them start with 8". But, I'm pretty sure you can DIY or get one custom made by your local tailor
Flextubes are great, but prone for straylights and other influences like dust, dew and other stuff. For visuell observations mostly ok, but a astrocam can capture more than the human eye, even straylight (i.e. from the Laptop or Smartphone screen beside your scope).
Gottfried
TS Photoline 60/360, TS Photon 150/750 Advanced Newton, Bresser 90/500 & MC 127/1900, ZWO ASI120MC-s, Player One Neptune-C, Altair Hypercam 294C Pro, SVBONY SV165 Guidescope, iOptron Cube Pro & CEM25P, Bortle 4, Germany-northwest region