Coma Correctors

[pmrid (Peter)]

I have noticed the F4/5 aplanatic coma corrector selling on Ali Express for AU$180 or so. It does look identical to the one offered but SKyWatcher for 3x that.

https://www.aliexpress.com/item/1005...hoCrlMQAvD_BwE

I'm looking to replace an early model Baader MPCC and am wondering whether the AliExpress item is worth the money.

Anyone??

[ChrisV (Chris)]

I know this isn't any help but I remember looking at that CC. I couldn't figure it out, so chickened out and bought the skywatcher second hand on IIS for not too much more (well cheaper than a new one).