Diopters are optical close up lenses that make macro photography easy.
•When added to a lens they greatly narrow the depth of field while reducing the minimum focusing distance of your lens.
•The effective focal length of the dioptere are:
• +1 = 1000mm
• +2 = 500mm
• +3 = 333mm
• +4 = 250mm
• +5 = 200mm
Reviewed by 1 customers
I have a small anamorphic rig and use this infront of a an achromatic diopters for closer focus. B&W is great because it's thin and you can stack them with less chance of vignetting.