To all my US customers!

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Sales taxes (were applicable) are collected by eBaY

• 1.5X Magnification with -4.5 to +4.5 diopter correction
  
• shorter still and adjusts over the wider range 0.5 - 3.0 mm
• the fixed seat iris works with individually pin-located tempered spring steel leaves
• aim point precisely maintained throughout the wider range of adjustment by introducing a new system of aperture control operated by varying the pressure of a steel tube against the central aim point - guaranteeing a perfect circle
• light reflection kept to a minimum by use of matt finishes internally and externally
• unique Gehmann patent not found in other irises
• Thread Parker Hale
  Parker Hale Thread is 7/32“x40Gg BS  (55 degree flankangle)
  Redfield use 7/32x40Gg Ansi ( 60 degree flankangle)
• If you want to use the iris and polariser alone WITHOUT the diopter you need item #577 which is an adaptor. The adaptor on the diopter is not removeable.
• Unit is 1 inch in diameter