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I have a C925.
I would regard a dew shield as handy but a corrector plate heater as essential. You will find that for a lot of the year an SCT will dew up in a flash. A dew shield will extend your observing time by an amount, a heater almost indefinitely.
An eyepiece heater is handy too, nothing more irritating than on a cool night, inadvertently breathing on your eyepiece and fogging it up.
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