Sorry, I'm visually impaired and didn't catch the little tail on what i thought was an o. I know how anoying it can be when someone gets your name wrong. Its surprising how many different pronuunciations can be made out of my last name!
Thanks for explaining the ins and many outs of o-scope lenses and shutters. Your expanded explanation in a separate post on this forum goes a long way in providing information that I was completely unaware of.
I thank you.