Quote:
Originally Posted by Gem
Hi
There is a slight milky appearance to the corrector lens of my (new) C9.25 - it has been there since I bought it. It doesn't seem to be consistent across the lens.
Is this normal? Is it anything of concern? I have just emailed the shop but thought I would ask about for opinions...
Thanks  |
Well Grant, my new (end of last year purchase) C9.25" OTA exhibits the same thing. I never noticed it until collimating a few weeks ago when I shone a red light on the corrector plate to adjust the collimating screws. My first thoughts were "oh dear" what's this?, particlarly for a new scope. After a few moments, and looking at it more closely, I was convinced it is just very slack cleaning at the factory. I can see a very thin cloudy band around the secondary housing adjacent to the correcting plate and a larger area not far from it. It appears as if the cleaning cloth has been plonked on the plate and then a quick swirl around thus leaving the inner cloudiness and at the end of the swirl the cloth is lifted off leaving a further patch of cloudiness/smudging.
Having said that, the 9.25" performs brilliantly all the same and when I get around to it will clean the inner surface of the corrector plate properly, I've done them before and will do it again perhaps, just like the many chores around the house.