A large Dobson often sits idle in the shed or garage for a long time, and then the optics collect dust and dirt. This Astrozap dust cover for a 20-inch Dobson shields the optics while you are not using the telescope.
Dobsons of 20 inches vary merk in construction. Therefore, before ordering, measure the outer dimensions of the part of your telescope that you want to cover. This way, you won't have to clean your mirrors as often; you can find the necessary items here. cleaning and maintenance.
After a wet night, let the telescope dry thoroughly before placing the cover over it, so that no moisture remains trapped inside. Check the collimation briefly after a long period without use before observing; in our explanation about collimating Read how to do it.
If your Dobson is slightly smaller, then it will fit. the cover for 18 inch better.
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