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Old 01-01-2019, 07:36 PM
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Merlin66 (Ken)
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Solar proms/ filament in Ha 31st Dec 2018

SM60/PST double stack/ ED80 plus ASI 174

The NR rings from the ASI 174 definitely need the tilter!!!
Enjoy!!
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Old 01-01-2019, 08:11 PM
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GUS.K (Ivan)
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Nice captures ken, we've had quite a few good proms in the last week. that filament started as a nice prom a few days back with a lot of structure visible at high power through my LS100. What causes the newton rings, i've never encountered them with my asi174.
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Old 01-01-2019, 08:18 PM
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Merlin66 (Ken)
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Gus,
Any time I use the ASI 174 with a barlow/ powermate the Newton rings appear...(not the case with the ASI 1600)
The only workable solution is to use the ZWO T2 tilter - guaranteed to work every time.
I was trialling an ES x3 extender which needs a 1.25" adaptor on the tilter - forgot!!
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