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Hello all, I always have my 22UC stored iindoors. Beware of the heated light bulb method, the original owner of this scope did the same thing in his observatory in Kentucky but the mice loved the heat

Mirror is in unheated attached garage with a terrarium heater (~$15) underneath to control any excessive moisture. Mirror (U.C.) is covered to protect from dust. Never had any issues with an 18, 20 or

Even if your coating is flaking, it’s probably only a very small percentage of the area. Mine is in that category and it still works great. Eventually I will have it recoated, but there’s no rush.

I am with Frederic. I would clean and use first. One of the best pieces of advice I got early in my astronomy life was "If you do not like what you see when you look look at the mirror with a

I bring my scope in the house. I keep it under cover there keep some of the dust off. Chris

To follow up on the thread of evaluating when a mirror should be recited, I would like to hear how others store their telescopes during storage to protect the mirror and its coatings. ?I keep my

Hi Jesse, When you say I know it is not dust, does it mean that you already cleaned properly the mirror? If not my first move would be to clean the mirror properly, as described in a lot of videos

From the BACK of the mirror .

Point of clarification. So do you shine a light from the front and look at the back or shine a light from the back and look at the front ?

Recoat! Dog gone talk-to-text app!Sent from my Galaxy

If you look at from the back and do not see light coming through the coating that is a good sign that the coatings are in good condition. Dave Kreige has a YouTube video on cleaning mirrors. I would

The Swayze mirror in mine was from 2002. The original coating was done by Spectrum Coatings. Ive had it recoated once since then, in 2016. Looking at the pics of your mirror I would recommend you do

Well that is a plus. My son lives near the Pacific Ocean with all that saline humidity. He has to recote his mirror quite often.?Good luck with your endeavorsSent from my Galaxy

It was made in 2005 and has never been recoated. Very light wash no it did not come off.

How old is the coating on the mirror? It looks pretty much like mine except mine is worse. That being said my 15" is number 118, built in 1994. If it doesn't wash off I'd guess the coating is breaking

Right but what am I looking for ? You will see some light right ? Try it on yours. If it’s light and uniform is that ok or it should have absolutely no light at all come though the back ? Also how

Well, you can always shine a light from the backside of the mirror and see where the light passes through…any areas without a coating will be obvious. Do it in a darken room of course.

Right but how and when can you tell whether it’s coatings or something else ?

No. Michigan and the guy I got it from said he always stored it inside when not in use.

Was it stored near the coast? Humid salty air.?Just guessing.?Regards,?Frank Nowatzke?Sent from my Galaxy