Dust Issues
- brenski
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Dust Issues
This is DSS stack of C2022 E3 ZTF. I've cropped the image down to show the dust elements. I've left a tiny section of the comet in (which was centre frame) to help illustrate how imposing these "specs" are. Don't know if anyone has a solution to this, but my darks, flats and bias frames appear to have had no effect. Equipment: Zwo ASI183MC Pro (cooled), Evostar 72 ED DS Pro, S/Adv 2i.
- Gordon
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Re: Dust Issues
Flats should take that out. How are you taking your flat frames?
On a side note, based on the size I would say it's on the lens of the telescope. I usually us a small hand held bulb blower on my scope lens before I go out to image. It also could be water spots if you have had any issues with dew.
On a side note, based on the size I would say it's on the lens of the telescope. I usually us a small hand held bulb blower on my scope lens before I go out to image. It also could be water spots if you have had any issues with dew.
Gordon
Scopes: Explore Scientific ED80CF, Skywatcher 200 Quattro Imaging Newt, SeeStar S50 for EAA.
Mounts: Orion Atlas EQ-g mount & Skywatcher EQ5 Pro.
ZWO mini guider.
Image cameras: ZWO ASI1600 MM Cool, ZWO ASI533mc-Pro, ZWO ASI174mm-C (for use with my Quark chromosphere), ZWO ASI120MC
Filters: LRGB, Ha 7nm, O-III 7nm, S-II 7nm
Eyepieces: a few.
Primary software: Cartes du Ciel, N.I.N.A, StarTools V1.4.
Scopes: Explore Scientific ED80CF, Skywatcher 200 Quattro Imaging Newt, SeeStar S50 for EAA.
Mounts: Orion Atlas EQ-g mount & Skywatcher EQ5 Pro.
ZWO mini guider.
Image cameras: ZWO ASI1600 MM Cool, ZWO ASI533mc-Pro, ZWO ASI174mm-C (for use with my Quark chromosphere), ZWO ASI120MC
Filters: LRGB, Ha 7nm, O-III 7nm, S-II 7nm
Eyepieces: a few.
Primary software: Cartes du Ciel, N.I.N.A, StarTools V1.4.
- JayTee
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Re: Dust Issues
I had a problem with dust actually on my sensor (ASI120MC). Very annoying and somewhat scary to clean. I did it and all is well, but it was still annoying!
∞ Primary Scopes: #1: Celestron CPC1100 #2: 8" f/7.5 Dob #3: CR150HD f/8 6" frac
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
- brenski
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Re: Dust Issues
i've tried various "flats"Gordon wrote: ↑Fri Feb 03, 2023 9:12 pm Flats should take that out. How are you taking your flat frames?
On a side note, based on the size I would say it's on the lens of the telescope. I usually us a small hand held bulb blower on my scope lens before I go out to image. It also could be water spots if you have had any issues with dew.
some using the usual white t-shirt method using ADU calcs
i've even (desperately) also taken flats at the same exp/gain settings as the Lights too
nothing seems to work
- brenski
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Re: Dust Issues
dont have that problem with the 183MC Pro [Cooled]. Fortunately, there's protective glass over the sensor.
- dcrowson
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Re: Dust Issues
These are are filters or a flattener - something not very close to the chip.
Flats should definitely remove these. You might post a light, dark and a flat and dark for it. Flats should just work and these wouldn't be worth opening the imaging train up to clean assuming they work.
Dan
Flats should definitely remove these. You might post a light, dark and a flat and dark for it. Flats should just work and these wouldn't be worth opening the imaging train up to clean assuming they work.
Dan
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