Hi everyone,
Learning to use my 2nd hand Quark Chromosphere and noticed a few 'crack' or optical imperfection in the back... Blocking filter or the polarizer perhaps? What could be the reason for this?
Noticed some DIY replaced this filter at Solarchat! Forum (I've tried to join, no luck to get email back
). I know, the mod can easily can ruin the Etalon ... and it's usable as is with limited FOV. The ASI432 chip I'm using has bigger FOV and perhaps a ASI174 would be a better match (120mmf8 achro) ?
Any suggestion to replace or not to?
Mik