Hello guys,
I've already read a lot of forum post about this topic. Usually the problem apears to be reflections inside the tube, light leaks, sometimes the corrector sticking inside of the tube or a GPU causing wierd stuff. Some people are doing flats wrong or using fauly bias /darkflats. All these errors can I exclude in my case.
My equipment:
Skywatcher 300 Quattro
Touptek 2600 mono
Starizona Nexus Reducer Corrector
Astronomic LRGB Filter.
Before you ask, I have tried every single coma corrector I am aware of existing and I had 3 different filter Sets. ZWO, Astronomik Deep Sky Filter and the 2c Astronomik Filter Set. Even mirror shifting is now fixed and not a problem too anymore. Nothing worked. My telescope is darker as the nightsky inside
I have this problem for 3 years know. Supprisingly on my 150 Quattro this problem seems not to be existing.
I have tried everything and I came to one conclution. When imaging an object low on the horizon right in the light pollution, the flats will never work in LRGB and O3. Ha is normaly not a problem.
When imaging outside of the city at B4 or better the flats will allways work, even with questionable flat taking methods.
It seems that the flats needs to be way more accurate when taking images in bad bortle class, because the vignetting is getting stronger there. Ive also tried several different exposure times/ gains/ gain mode and flat methos like skyflats, extremly expensive flatfield and now even a IDY flatfield.
I am very clueless anymore and I think I will just swap to a smaller sensor becaue I can almost never use my APS-C Sensor.
Anyways, here is the error.
This is the Masterflat
I can upload the filts and some light with darks and bias when someone want to have look at it.
On the left is a non stretched masterflat, on the right a streched single frame.
I hope anyone have an idea! Thanks for reading.
Marc
I've already read a lot of forum post about this topic. Usually the problem apears to be reflections inside the tube, light leaks, sometimes the corrector sticking inside of the tube or a GPU causing wierd stuff. Some people are doing flats wrong or using fauly bias /darkflats. All these errors can I exclude in my case.
My equipment:
Skywatcher 300 Quattro
Touptek 2600 mono
Starizona Nexus Reducer Corrector
Astronomic LRGB Filter.
Before you ask, I have tried every single coma corrector I am aware of existing and I had 3 different filter Sets. ZWO, Astronomik Deep Sky Filter and the 2c Astronomik Filter Set. Even mirror shifting is now fixed and not a problem too anymore. Nothing worked. My telescope is darker as the nightsky inside
I have this problem for 3 years know. Supprisingly on my 150 Quattro this problem seems not to be existing.
I have tried everything and I came to one conclution. When imaging an object low on the horizon right in the light pollution, the flats will never work in LRGB and O3. Ha is normaly not a problem.
When imaging outside of the city at B4 or better the flats will allways work, even with questionable flat taking methods.
It seems that the flats needs to be way more accurate when taking images in bad bortle class, because the vignetting is getting stronger there. Ive also tried several different exposure times/ gains/ gain mode and flat methos like skyflats, extremly expensive flatfield and now even a IDY flatfield.
I am very clueless anymore and I think I will just swap to a smaller sensor becaue I can almost never use my APS-C Sensor.
Anyways, here is the error.
This is the Masterflat
I can upload the filts and some light with darks and bias when someone want to have look at it.
On the left is a non stretched masterflat, on the right a streched single frame.
I hope anyone have an idea! Thanks for reading.
Marc
