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8X21 Pentax Jupiter III Binoculars (Clamshell Package)

Pentax Cameras
KEH Model# 363520

This product is currently out of stock. Please contact a KEH photography expert to discuss similar options.

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8X21 Pentax Jupiter III Binoculars (Clamshell Package) Description


Weighing in at just 6.2 ounces, the feather-light MCF III Jupiter Binocular is ideal for go-anywhere, casual use. Despite its diminutive size, it still offers premium Pentax features. Whether attending a sporting event, traveling or hiking, the MCF III Jupiter binoculars offer great optics at a great value. 

Weighing only 6.2 ounces, the feather-light PENTAX 8x20 MCF II Jupiter binocular is ideal for casual use and comes standard with premium PENTAX features. Whether attending a sporting event, traveling, or hiking, this binocular provides great optics at an affordable price.

KEH Specifications

  • Prism Type: BAK4
  • Magnification: 8x
  • Lens Diameter: 21mm
  • Angle of View: 7°
  • Field-of-View: 369' at 1000'
  • Min. Focus Distance: 15'
  • Exit Pupil Diameter: 2.63mm
  • Eye Relief: 10mm
  • Interpupillary Adjustment: (55mm-70mm)2.2-2.8”
  • Focus Method: Manual
  • Dimensions: 3.0” x 4.2” (775mm x 106mm)
  • Weight: 4.6 oz


General information

Brand Name Pentax
Manufacturer Part Number KB61393
Manufacture GTIN 0027075613935
Product information
Additional Information

Lens Construction:

  • Objective Lens: 2 Elements in 1 Group
  • Eyepiece Lens: 3 Elements in 2 Groups


  • Diopter Adjustment Range: +/- 3 m-1
  • Eye Width Adjustment Range: 2.2 to 2.8"
Product Series
MCF Jupiter II
Product Model
Maximum Field of View @ 1000 yd
324 ft
Maximum Eye Relief
10 mm
Relative Brightness
Prism Design
Maximum Angular Field of View (Real)
Maximum Angular Field of View (Apparent)
Prism Type
  • Multi-coated