Scopes in the rain?

A bit of a tangent, but what about binos/spotting scopes in the rain? At a certain point they become effectively useless. I would be curious to hear if anyone has tips or tricks beyond constant attention with a microfiber cloth. Simple enough to keep the lenses on your rifle scope dry with good caps, not so much so with the other optics.
 
A bit of a tangent, but what about binos/spotting scopes in the rain? At a certain point they become effectively useless. I would be curious to hear if anyone has tips or tricks beyond constant attention with a microfiber cloth. Simple enough to keep the lenses on your rifle scope dry with good caps, not so much so with the other optics.

You can take a plastic tub (e.g., yogurt, sour cream, etc.), cut the bottom out, and then slip it over your your scope like a big, extended sunshade. That does a good job reducing the amount of water on the objective lens. Kind of bulky to pack though... I only use that trick when glassing from my truck, not in the field.
 
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