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Fieldscope Eyepieces NEP Series for MONARCH Fieldscopes

Model name NEP-38W NEP-20-60 NEP-30-60W
With 82/82-A With 60/60-A With 82/82-A With 60/60-A With 82/82-A With 60/60-A
Magnification (x) 38 30 20-60 16-48 30-60 24-48
Real field of view (°) 2.0 2.5 2.1*3 2.6*3 2.0*3 2.5*3
Apparent field of view (°)*1 66.4 40.5*3 55.3*3
Field of view
at 1,000m (m)
(approx.)		 35 44 37*3 46*3 35*3 44*3
Exit pupil (mm) 2.2 2.0 4.1*3 3.8*3 2.7*3 2.5*3
Relative
brightness		 4.8 4.0 16.8*3 14.4*3 7.3*3 6.3*3
Eye relief (mm) 18.5 16.1*3 15.2*3
Length (mm)*2 76 88 90
Outer diameter (mm)*2 55 55 55
Weight (g)*2 250 310 320
Waterproof performance Eyepiece: Not waterproof
With Fieldscope attached: Waterproof (water equivalent to 5mm per minute for a duration of 30 minutes)*4
  • *1Calculated based on the ISO14132-1:2002 standard. For details, click here.[Open in a new window]
  • *2Without caps and eyecup.
  • *3At lowest magnification.
  • *4This product will suffer no damage to the optical system in falling water equivalent to 5mm rainfall per minute for a duration of 30 minutes (in normal use with an eyepiece attached to the main body correctly). NOT designed for underwater usage.
  • Note: Because values shown on these charts were designed values rounded up/down, calculation of figures may not match exactly.