510 RT  Basic Iris with removable thread

• 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
• Removable thread allow diopter 50300-0, 50300MC or 50309
  
• Thread is male M9.5/9.5mm
• unit is 1 inch in diameter
  

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