How to make a periscope , Tutorial, DIY

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In today s video I m going to show you the idea of how to make a periscope. Periscope is one of the simplest optical appliances, which can be made at home. It is convenient for watching through the crowd at races and competitions. You may observe sea nature without coming up to surface. Periscope is also used by land forces. I suggest to make this interesting device at home. FB: INSTAGRAM: Main channel: