Often people ask "how can you set the right distance by guessing? " , well maybe it is because I grew up with cameras that had no accurate measurement system. But I'm rarely off, my long by gone teacher tought me a simple trick: Learn the legth of your arm, memorize that and use that as your close-by scale, half it or double it; Learn the span-width of both your arms, the spread of your fingers , the length of a firm pass or step, and after a while you'll be very accurate with measuring any critical distance. After about 3 - 4 meter ( 10-13 feet ) it is not critical anyway anymore. Set hyperfocal ( make maximum use of depth of field ) and very very rarely you will have an unsharp image with the great little 35.
J.