Solar proms/ filament in Ha 31st Dec 2018

[Merlin66]

SM60/PST double stack/ ED80 plus ASI 174

The NR rings from the ASI 174 definitely need the tilter!!!
Enjoy!!

[GUS.K]

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.

[Merlin66]

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!!