Latest update on my SDM...
Peter received the 16" gso mirror not too long ago and conducted some tests, the results were shocking
It was a total dud and in Peter's words, "
I'd be kind in saying it had a Strehl ratio of about 0.5... in the star test instead of a point and a couple of aireys rings light was spewing out all over the F.O.V". Thankfully because Peter is such a nice guy (
) he has not charged me anything at all for the mirror (not even delivery charges in an attempt to receive a refund) and suggested I go for the Suchting mirror
I've been in contact with Mark and have placed an order on a 14.5" Quartz mirror
I think it'll suit my "portability" needs more so than the 16" without compromising too much on the visual aspect. Mark isn't sure whether the Quartz has a visual advantage than the Pyrex ,but it'll make for an interesting test. Anyone here compared the two?
Lesson learnt though, above 12" mirrors for me in future no gso!