Weston master v invercone exposure meter instructions. Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Weston master v invercone exposure meter instructionsWESTON Master V EXPOSURE METER AND INVERCONEHigh and Low Light Scales The illustrations on this page show the method of operating the baffle over the photo- electric cell. When the baffle is closed, the high light scale (10-16) moves into position. The battle should be kept closed when the light reads 10 or higher. If the light reading is less than 10, the baffle should be opened bringing the low light scale (0-10) into use.