Skywatcher mirror Pv rating

[NotSoSuperNova]

I think the title is pretty indicative. I saw this on the Orion website and wondered where I stood with my 10"?

[Stu]

Most likely between 1/4 and 1/6 I should think.

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[NotSoSuperNova]

Most likely between 1/4 and 1/6 I should think.

Thanks Stu, I thought it would be to be honest. I was thinking that this is one of those questions that someone on here will know off the top of their head 

[John]

There will be some variation but Stu's figures seem right to me. Someone on the forum had their 8" F/5 Skywatcher mirror tested once (by Orion Optics as it happens) and it came out at 1/5th wave PV - they rated it as a pretty decent mirror.