SingAstro

If you have a plan to observer the Sun using Herschel Wedge prism, please don't forget to know that any refractor using Petzval design or some kind like that which built-in field flattener/reducer can not use couple with a HerschelWedge prism.

POP

Hello, I'm in Bangkok, Thailand. I'm using a TEC-140 for visual and imaging with dedicated FF for TEC-140. It is very good optical quality. The contrast is the best. color correction is just behind Takahashi TOA-130 but optical quality as I look through. I believe, it is better than TOA-130 at high ...

Not here but very close from you.

FYI,

Arief, you just saw the Saturn through the TEC-140 by using WO Quartz 2" diagonal at Bangkok, Thailand.