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Old 25-11-2017, 02:14 PM
PhilTas (Phil)
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PhilTas is offline
Join Date: Apr 2013
Location: Darwin
Posts: 130
I’ve also got a 12” dob (Bintel/GSO) with a very dirty mirror. The previous owner had kept it in a shipping container. The top end heat and humidity has not been kind to it.
I’ve washed it twice, and apart from clearing a layer of dust and dirt, it is still in a bit of a sorry state.
But, I have enjoyed some very nice views through this scope.
The purists here will say that we shouldn’t accept second rate views, but I think that we only lose a little bit of contrast when the mirror is less than perfect. For visual use, I am very happy with it.
Jimmy, if you know anyone with a similar size scope, try to arrange a comparison. You might be surprised at how similar the views will be.
Cheers Phil
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