Focal Lengths:

  4mm - SPL040
  5mm - SPL050
  6mm - SPL060
  8mm - SPL080
  10mm - SPL100
  12mm - SPL120

 Specifications:

• Field size - 3.9mm
• Apparent field - 42 degrees
• Eye relief - varies from 125% (4mm) to 140% (8-12mm) of the focal length
• Number of elements - 3
• Operating range - from F4 upward
• Broadband multi-coated on all surfaces
• Barrel - 1.25" polished stainless steel
• Top - conical non-metallic surface to resist fogging and prevent freezing to skin