1. Home
  2. News
  3. 2009

Nikon Introduces New EDG Fieldscope Series

March 5, 2009

Nikon Vision Co., Ltd., a subsidiary of Nikon Corporation, is pleased to introduce the EDG Fieldscope series, a new Nikon Sport Optics brand.

EDG is pronounced "edge" because the series provides edge-to-edge brilliance and overall leading-edge performance. The optical and mechanical results of the current fieldscope series, which has won plaudits from users around the world, have been enhanced for the new EDG series. The outstanding performance of EDG Fieldscopes, including natural color reproduction and crisp clarity, has been achieved through the use of Extra-low Dispersion (ED) glass. The straight-type models also feature dielectric high-reflective multilayer prism coating.

Both the main bodies and eyepieces of the EDG Fieldscopes are waterproofed with O-ring seals and nitrogen gas, allowing EDG Fieldscopes to be used in adverse weather conditions. Seven kinds of eyepiece are available, providing unparalleled performance in differing environments. The newly developed zoom eyepiece in particular offers superb optical performance with minimized distortion and long eye relief (18.4-16.5mm).


EDG Fieldscope 85


EDG Fieldscope 85-A


EDG Fieldscope 65


EDG Fieldscope 65-A

Key Features

  • Nikon's ED (Extra-low Dispersion) glass for chromatic aberration compensation
  • Phase correction coated roof prism for high resolution
  • Dielectric high-reflective multilayer prism coating on roof prism for the brightest view (straight models only)
  • All lenses and prisms are multilayer-coated for the brightest images
  • Bayonet mount with lock for EDG eyepieces
  • Fog-free and waterproof up to 2 m for 10 min.—thanks to use of O-rings and nitrogen gas (water-resistant main body/eyepiece joint)
  • New and stylish design
  • Three tripod mount screw holes provided for flexible mounting position; optimum balance realized by CAE (Computer Aided Engineering)

EDG Fieldscope Specifications

  EDG Fieldscope 85 EDG Fieldscope 85-A EDG Fieldscope 65 EDG Fieldscope 65-A
Objective diameter (mm) 85 85 65 65
Close focusing distance (m) 5.0 5.0 3.3 3.3
Length
(mm)*		 379 398 313 332
Height x Width (mm)* 127 x 102 131 x 102 120 x 88 131 x 88
Weight (g)* 2030 2030 1560 1620
  • *Body only

Key Features—Eyepiece

  • Seven new kinds of eyepieces for optimum optical performance
  • Bayonet mount with lock for easy attachment and release
  • Fully multilayer coated
  • Fog-free and waterproof up to 2 m for 10 min.—thanks to use of O-rings and nitrogen gas (water-resistant main body/eyepiece joint)
  • Eyecup moves in and out at turn of eyepiece ring and stops at any of three click-stops to facilitate observation and digiscoping (not applicable to FEP-30W, FEP-25LER and FEP-20-60)
  • FEP-30W offers a choice of eyecup: soft rubber cup for observation and digiscoping eyecup for connecting with the Digital Camera Bracket FSB-series
  • FEP-25LER has ultra long 32.3 mm eye relief
  • FEP-20-60 features long eye relief (18.4-16.5 mm) and minimized distortion with aspherical lens
  • Numerous COOLPIX series compact digital cameras can be attached to EDG eyepieces (except FEP-20-60) with digital camera bracket FSB-series

EDG Eyepiece Specifications

  FEP-20W FEP-30W FEP-38W FEP-50W
EDG Fieldscope diameter 85 65 85 65 85 65 85 65
Magnification (x) 20 16 30 24 38 30 50 40
Real field of view
(degree)		 3.3 4.1 2.4 3.0 1.9 2.4 1.4 1.8
Apparent field of view (degree)*1 60 60 64.3 64.3 64.3 64.3 64.3 64.3
Field of view
at 1,000 m (m)		 58 72 42 52 33 42 24 31
Exit pupil (mm) 4.3 4.1 2.8 2.7 2.2 2.2 1.7 1.6
Relative brightness 18.5 16.8 7.8 7.3 4.8 4.8 2.9 2.6
Eye relief (mm) 20.1 20.1 25.4 25.4 17.9 17.9 17.8 17.8
Length (mm)*3 59 59 81*4 81*4 74 74 71 71
Outer diameter
(mm)*3		 63 63 63 63 63 63 63 63
Weight (g)*3 240 240 390*4 390*4 230 230 230 230
  • *1Calculated based on ISO14132-1: 2002
  • *2At the lowest magnification
  • *3Without caps
  • *4With detachable turn-and-slide eyecup
FEP-75W FEP-25LER FEP-20-60
EDG Fieldscope
diameter		 85 65 85 65 85 65
Magnification (x) 75 60 25 20 20-60 16-48
Real field of view
(degree)		 1.0 1.2 2.4 3.0 2.2*2 2.8*2
Apparent field of view (degree)*1 64.3 64.3 55.3 55.3 42*2 42*2
Field of view
at 1,000 m (m)		 17 21 42 52 38*2 47*2
Exit pupil (mm) 1.1 1.1 3.4 3.3 4.3*2 4.1*2
Relative brightness 1.2 1.2 11.6 10.9 18.5*2 16.8*2
Eye relief (mm) 17 17 32.3 32.3 18.4*2 18.4*2
Length (mm)*3 71 71 77 77 99 99
Outer diameter
(mm)*3		 63 63 63 63 63 63
Weight (g)*3 230 230 320 320 330 330
  • *1Calculated based on ISO14132-1: 2002
  • *2At the lowest magnification
  • *3Without caps
  • *4With detachable turn-and-slide eyecup
For more information
  • The information is current as of the date of publication. It is subject to change without notice.