Does any one has experience with optical flat protective window that cover the corrector to protect it from dust and in hard field use like in the sea shore???
can it remains attached to the corrector during astronomical observation specially at high power??Is the resolution and contrast would be affected??
Any optical element that you add will have some impact on resolution/contrast. However, Questar will give you (er... charge you for) a quality flat. I recall one of the old Questar advertisements where a guy used his Q to observe an oil refinery through the plate glass window of his house. The advert included refinery pictures - good quality stuff for the time. (The genesis idea for Surveillance Models? LOL)
FWIW: I would also be concerned with the effect of salt air on all that nice polished aluminum!
Thanks Mapman ...about the salty air effect for my little knowldge that Magf2 coating is very resistant ...Questar survelince instruments with Magf2 are kept on sea shores all days and nights for 15 years without any deterioration of the coating.
Quote: Thanks Mapman ...about the salty air effect for my little knowldge that Magf2 coating is very resistant ...Questar survelince instruments with Magf2 are kept on sea shores all days and nights for 15 years without any deterioration of the coating.
My concern was with the corrosion on the aluminum mount base and forks.
Q uses a nice coat of wax to solve the base and forks corrosion problem (your finger's salt does the same thing). Then, after using it you take it indoors and buff it with a soft cloth. It should be sent to New Hope every so often for cleaning and Mother's touch.
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