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Hello, I am wondering how you guys go round taking flats that works for you. Since I have switched to Newtonian telescope (TS-8 ONTC f/5), flats aren't calibrating out the dust, and has a minimal effect on flattening out the image. I aim with SGP to reach 30K or 35k ADU with my Moravian G2-8300, using ledpanel covered with white cloth and placed on the telescope front. Telescope in zenith position. Histogram then reaches a little over half, which worked before with a refractor. Is it essential to reach on third of the Histogram? Could that be the issue? Any ideas? I really don't want to through away 40 hours of material  QUOTEQUOTE SELECTEDEDIT |
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Everyone gets problems with flats, so don't let that worry you. I always do mine at 30K ADU and never more, ignore the histogram Make sure you camera/optical train has not moved a single pixel from when you took your images. I take my flats before the evening starts and then if I have moved the optical train I redo them again. I use a G2-8300 MkII with a Moravian MkII x7 2" FW. I had a problem where I used unmounted filters and because I didn't want to pinch them I only slightly locked them and they were moving in the holder, I nipped them up a little more and all is good now. Hope that helps? |
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Hi Firas, Flats are always difficult, it's a bit of Black Magic! ;) Make sure the exposure time is not too short, go for 10 seconds. The panel has to be dimmed quite a bit to reach that. Regards, Albert |
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| If you use SGP, there` s a guide there for setting up how to take flats with different filters. |
