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Einheitsdoppelfernrohr EDF 7x40 oB

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Mint - out of arsenal stock and never issued to the troops



  • Without radioactive reticle illumination (Tritium-Element) - EDF 7x40 oB (without lighting)

  • Slip-on grey-filters in separate box

  • Including DV Description and Usage

All Over Condition
Unausgegeben - Ungebraucht - Neuwertig
Inner Condition
Linsen und Prismen klar und sauber
Oculars
Neuwertig
Objectives
Neuwertig
Mechanics
Einwandfrei
Collimation
Einwandfrei
EDF 7x40 oBEDF 7x40 oB
EDF 7x40 oBEDF 7x40 oB
EDF 7x40 oB
EDF 7x40 oB
EDF 7x40 oB
EDF 7x40 oB
Description

Attributes and Designation from Description and Usage

Quote by Description and Usage:
"The dust- and waterproof EDF 7x40 oB is destined for usage under hamepred climatic conditions of field deployment."

  • Roof Prism Design
  • Individually Focusing Oculars
  • Spectacle Wearers Oculars
  • Metal Housing
  • Strong Rubber Armouring
  • Down-foldable Rubber Eye Cups
  • Waterproof and Dustproof
  • Shock Proof
  • Reticle
  • Infrarotaufklärungshilfe

Specifications from Description and Usage

  • Magnification                                                           7-times
  • Entry Pupil Diameter                                                 40 mm
  • Exit Pupil Diameter                                                  5.7 mm
  • Eye Relief                                                             > 20 mm
  • Field of Vision on 1000 m                          7° 30´ o. 131 m
  • Gloaming Index                                                         32.65
  • Gloaming Rate                                                             16.7
  • Dioptrien Adjustment                                            +- 7 dpt
  • Pupillary Distance Setting                                < 60-75 mm
  • Weight                                                                     1000 g

The rotational tests at the periodical reconditioning are very interesting.
Test conditions in extracts from "A 050/1/501 Einheitsdoppelfernrohr 7x40 reconditioning" from 1982

  • Leak tightness
    Over pressure test: Pressure inside 50,7 kPa (this means low head 5 m)
    Specification: Pressure drop not allowed
  • Low head test
    Low head: 1 m
    Water temperature: 10 - 15 °C lower than unit temperature (this means underpressure inside the unit)
    Check-out time: 1 h
    Specification: No water nor fog inside
  • Drop test
    Drop height: 0,75 m
    Direction: 1 drop straight horizontal on broadside
  • Hit test
    Acceleration: 15 g
    Pulse duration: 5 - 10 ms
    Direction: 250 hits vertical on objective, 150 hits straight horizontal on broadside, 150 hits straight horizontal on narrow side
  • Hit test
    Acceleration: 120 g
    Pulse duration: 1 - 5 ms
    Direction: 2 hits vertical on objective, 4 hits straight horizontal on broadside, 4 hits straight horizontal on narrow side
  • Vibration stress
    Frequency range: 30 - 80 Hz
    Acceleration: 6 g
    Check-out time: 2 h vertical on objective side, 1 h straight horizontal on broadside, 1 h straight horizontal on narrow side
  • Cold resistance
    -50 °C, Check-out time 2 h, after unit equalization of requested temperature, rubber parts to -40 °C
  • Heat resistance
    +60 °C, Check-out time 2 h, after unit equalization of requested temperature
    Specification: No loss of grease
  • Cyclic temperature test
    Upper temperature: +60 °C
    Lower temperature: -50 °C
    Check-out time: 5 cycle every 2 h
    Specification: No loss of grease
  • Storage temperature
    +80 °C, Check-out time 1 h,  after unit equalization of requested temperature
    Specification: No loss of grease
  • Sea water resistance
    Temperature: +27 °C
    Check-out time: 168 h
    Compounding: sodium chloride 27 g/l, magnesium chloride 6 g/l, calcium chlorid (free of water) 1 g/l, potassium chlorid 1 g/l
    Specification: No corrosion

 

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