Lightnings taking a ride

by ceinmart

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It is really rather simple. The diopter value will tell you how close you must be to the subject of your photograph, the farthest distance you can get a sharp image with the close-up lens on. you divide one metre by the diopter value to get the distance, which is the focal distance of the close-up lens. Hence a +1 lens will give a far distance of 1 m and ...



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