-4,5 to + 4,5 dpt.
 
 - correction of -3.5 to +3.5 diopter
 - incorporates the patented 510 iris
 - filters are of the highest quality optically flat glass in colours: yellow, green, brown, light grey, dark grey and orange
 - can be used as iris only
 - easy to clean - instructions included
 
 
 
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