>>4102079It's one of the few actually reliable Soviet cameras because it's so simple mechanically that even gulag slaves couldn't fuck it up. Focus is only by scale so you will have to guess the distance, but there was a separate rangefinder made for these cameras that goes in the cold shoe, just search for BLIK rangefinder on Ebay and you'll have a ton of them for practically nothing.
Pic related, one of my favorites taken with this thing.