Quote:
Originally Posted by astro744
Don't get too hung up over the numbers. A quality mirror maker will guarantee a first class mirror whereas mass produced makers can put whatever spin they want on the numbers. Don't get too hung up on Strehl either. I've seen a Rhonchigram of a mirror showing a clear defect yet reportedly had a very good Strehl! It's just another way to spin the numbers.
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Thanks Astro744 ,
Your reply post had some good information 'especially that last part !
Do you remember the cost of getting your 10" f6.4 refigured ?
I particularly like the way John Dobson reads a mirror in his video , starts at 1.19:55
https://www.youtube.com/watch?v=snz7JJlSZvw
Cheers
Bobby .