Opticron MM4 77 GA ED 18-54x77mm Travelscope (Straight Viewing)

BH #OPMM477SV3S • MFR #41358
Opticron MM4 77 GA ED 18-54x77mm Travelscope (Straight Viewing)
Key Features
  • Straight-Through Viewing
  • 18-54x SDLv3 Zoom Eyepiece
  • Large 77mm Objective Lens
  • Extra-Low Dispersion Glass
Designed and built in Japan, the straight-through viewing Opticron MM4 77 GA ED 18-54x77mm Travelscope is engineered with extra-low dispersion (ED) glass and fully multicoated optics to ensure accurate color rendition with improved clarity and contrast, while the large objective lens ensures views are bright and crisp from dawn to dusk or when viewing subjects at extreme distances on maximum magnification. For optimum eyepiece orientation, the tripod collar rotates up to 90° in both directions, and a 1/4"-20 mount makes it compatible with many tripods, quick release plates, and other popular support systems like window mounts. To help offset the weight of the objective lens glass, the chassis and body are made with a combination of magnesium, aluminum, and polycarbonate that maintains strength and stability.
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Opticron MM4 Overview

  • 1Description
  • 2Optical Performance
  • 3Use and Handling
  • 4Construction Details

Designed and built in Japan, the straight-through viewing Opticron MM4 77 GA ED 18-54x77mm Travelscope is engineered with extra-low dispersion (ED) glass and fully multicoated optics to ensure accurate color rendition with improved clarity and contrast, while the large objective lens ensures views are bright and crisp from dawn to dusk or when viewing subjects at extreme distances on maximum magnification. For optimum eyepiece orientation, the tripod collar rotates up to 90° in both directions, and a 1/4"-20 mount makes it compatible with many tripods, quick release plates, and other popular support systems like window mounts. To help offset the weight of the objective lens glass, the chassis and body are made with a combination of magnesium, aluminum, and polycarbonate that maintains strength and stability.

Optical Performance

  • Powerful 18-54x SDLv3 eyepiece has a 3:1 zoom mechanism that allows you to scan the terrain on low power and then bring your subject of interest in close for detailed observation and identification
  • Large 77mm objective lens ensures views remain bright and clear in all light conditions, or when observing subjects at long distances on high magnifications
  • Extra-low dispersion (ED) glass limits chromatic aberrations to produce clearer and sharper views with little or no color fringing
  • Anti-reflection fully multicoated optics improve light transmission, color rendition, clarity, and contrast

Use and Handling

  • Eyepiece is set in-line with the body to make finding subjects faster and tracking moving targets easier
  • Dual focus system with a 9:1 reduction allows for fast coarse and precision fine focusing
  • ±90° rotating tripod collar enables precise eyepiece placement for optimum comfort and accessibility
  • 1/4"-20 tripod mount easily fits on most quick release plates or photo/video/field tripods
  • Long eye relief at all magnifications presents a generous eye box to reduce eye strain and improve viewing comfort
  • 4.3mm exit pupil on 18x, 1.4mm on 54x

Construction Details

  • Designed and made in Japan
  • Combination of magnesium, aluminum, and polycarbonate chassis helps to offset the weight of the large objective without sacrificing strength or stability
  • O-ring sealed to be waterproof and nitrogen filled to be resistant to internal fogging when moving through extreme temperature and environmental changes
  • Rubber armor protects housing from impacts while providing a slip-resistant grip
  • Tethered objective lens cover
  • Compatible with SDL, HDF T, and HR eyepieces, so if you already have a compatible eyepiece you can use it to expand your spotter's magnification range options

Opticron MM4 Specs

Design
Viewing AngleStraight
Prism TypePorro
Performance
Magnification18 to 54x
Objective Lens Diameter77 mm
Minimum Focus Distance18.0' / 5.5 m
Exit Pupil Diameter18x: 4.3 mm
54x: 1.4 mm
Eye Relief20.0 to 18.0 mm
Features
FogproofYes, Nitrogen Filled
Water ResistanceWaterproof
General
Tripod Mounting Thread1/4"-20 Female
DimensionsL: 14.8 x H: 4.2 x W: 3.7" / L: 375.0 x H: 107.0 x W: 95.0 mm
Weight53.2 oz / 1508.0 g

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