Hello everyone, I need some advice about flats.
A few months ago, I switched to a monochrome camera with an IMX571 sensor (ToupTek ATR2600M), paired with a ToupTek filter wheel and Antlia LRGB filters. As my main telescope, I use an Askar 103 APO.
I capture everything with N.I.N.A., using the Flat Wizard, and I’ve tried making flats both with a white T-shirt over the telescope and with a light panel.
Lately, however, I’ve been experiencing a problem: the flats seem to overcorrect the lights, causing noticeable artifacts in the final master. I perform the entire stacking process using WBPP in PixInsight.
I was wondering whether the issue might be due to some incorrect setting in WBPP, or if the flats (or calibration frames in general) are not being captured properly.
For calibration, I use:
• Flats peaking at 33% of the histogram
• Flat darks with the same exposure as the flats
• Darks with the same exposure and temperature as the lights
Additionally, I was wondering if there is a way in PixInsight to correct or at least mitigate the artifacts caused by flat overcorrection.
Thanks in advance!
PS
I’m attaching screenshots of the master light, master flat, and master dark, all with STF applied, as well as a file after combining the RGB channels.
A few months ago, I switched to a monochrome camera with an IMX571 sensor (ToupTek ATR2600M), paired with a ToupTek filter wheel and Antlia LRGB filters. As my main telescope, I use an Askar 103 APO.
I capture everything with N.I.N.A., using the Flat Wizard, and I’ve tried making flats both with a white T-shirt over the telescope and with a light panel.
Lately, however, I’ve been experiencing a problem: the flats seem to overcorrect the lights, causing noticeable artifacts in the final master. I perform the entire stacking process using WBPP in PixInsight.
I was wondering whether the issue might be due to some incorrect setting in WBPP, or if the flats (or calibration frames in general) are not being captured properly.
For calibration, I use:
• Flats peaking at 33% of the histogram
• Flat darks with the same exposure as the flats
• Darks with the same exposure and temperature as the lights
Additionally, I was wondering if there is a way in PixInsight to correct or at least mitigate the artifacts caused by flat overcorrection.
Thanks in advance!
PS
I’m attaching screenshots of the master light, master flat, and master dark, all with STF applied, as well as a file after combining the RGB channels.
