Diopter-Magnification
   
     
 Diopter  Magnification  Working Distance
Primary Lens
 Auxiliary Lens
 3  1.75X  13"  3.0D  -
 3.5  1.88X  12"  3.5D  -
 5  2.25X  8"  5.0D  -
 7  2.75X  5.5"  3.0D 4D
 7.5  2.85X  5"  3.5D 4D
 9 3.25X 4.5" 3.0D 6D
 9  3.25X  4.5"  5.0D 4D
 9.5 3.38X 4.2" 3.5D 6D
 10  3.50X  4"  10.0D  -
 11 3.75X 3.8" 5.0D 6D
 11  3.75X  3.8"  3.0D 8D
 11.5  3.85X  3.5"  3.5D 8D
 13  4.25X  3"  5.0D 8D
 13.5  4.35X  2.9"  3.5D  10D
 14  4.50X  2.8"  10.0D 4D
 15  4.75X  2.6"  5.0D  10D
 18  5.50X  2.3"  10.0D 8D
 20  6.00X  2"  10.0D  10D

Represents STAYS Lens
 
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