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Old 20-11-2019, 11:15 AM
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Merlin66 (Ken)
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Solar Activity 20th Nov 2019

Battling high cloud and Newton Rings!!!
One nice prom...and a couple of pretty faint dynamic proms.
The CaK shows the AR and a couple of faint filaments.
Onwards and Upwards!
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Old 20-11-2019, 11:25 AM
Martin_S
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Nice sharp pics Ken, well done.

Martin
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Old 20-11-2019, 02:11 PM
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Merlin66 (Ken)
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Thanks, Martin!
I was forced to use the ASI 174, the ASI 1600 is out of commission.....
Iím beginning to think the single lock screw on the Coronado blocking diagonal may be aggravating the situation with Newton Rings.
The CaK in moments of good seeing, far and few between, certainly seems to be capable of producing some very good images.
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Old 20-11-2019, 02:53 PM
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traveller (Bo)
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Sharp image in CaK Ken,
Did the tilter work?
Bo
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Old 20-11-2019, 03:50 PM
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Merlin66 (Ken)
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Thumbs down

Bo,
Of all the solar cameras Iíve used the ASI 174MM is the worse for generating Newton Rings. Unfortunately this is well known.
The NR are always worst at Ha, I donít have a major issue at CaK.
The tilter certainly works, but, itís never 100%.
Thatís why I went for an ASI 1600MM, it doesnít seem to suffer half as much.
Iíll be OK when I can get it back in action...hopefully soon.
Ken
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Old 20-11-2019, 06:55 PM
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Ken ,have you tried using a flat frame in firecapture? along with your tilt adaptor?.

Martin
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Old 21-11-2019, 06:48 AM
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Merlin66 (Ken)
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Martin,
When I tried flats previously they didn't seem to work for me on solar disk imaging.
Maybe I need to revisit.
ken
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Old 21-11-2019, 03:09 PM
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The larger prom with some colour.....
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