Re: Mirror recommendation and feedback please
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A few years ago we had someone come to our dark sky site looking for help with a 10 inch dob he had bought.? We helped him get set up and working.? He had found the dried remains of a small raccoon on the mirror and had cleaned it off.? You could see the outline of it.? I was very surprised to find that it? did not much affect the views.
Chris?
On Mon, Oct 25, 2021 at 12:12 PM Charlie Starks < cstarks@...> wrote: 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.? It was last coated in 2007.? Charlie? ? 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 flashlight don't do that."
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 (Dave Kriege's one) with appropriate water of course.
My own experience was the I had some strange spots after my mirror got dewed one night and dried after.
A good cleaning removed everything.
By the way, looking from the front of the mirror with a light on the back will show you tiny spots of light where the coating is not there but it doesn't mean you have to change it immediately, sometimes the surface of these tiny spots is less than a fraction of a percent.
Hope this helps,
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Christine Zeltner