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Orion-18R 100 mm f/ 8 Lens

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Orion-18R 100 mm f/ 8 lens

Orion-18R 100 mm f/ 8 lens

Orion-18R 100 mm f/ 8 lens

Orion-18R 100 mm f/ 8 lens

Optical design

Orion-18R 100 mm f/ 8 optical design

Format: Medium Format rangefinder

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: Other mount

Optical design: 6/4

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Average price: $350

Specifications:

Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)
100mmf/8.0f/2212 49190/6,751/2

Additional information:

Orion-18R 8/100 is aerial and reproduction lens.

Various variants of the lens were produced by KMZ, LOMO and Kazan Optical-Mechanical Plant (KOMZ).

Coated optics.
 
The first versions were called simply Orion-18, on the rim they had the inscription "ГОИ РЕПРОДУКЦИОННЫЙ" ( "GOI REPRODUCTION").
 
It was used in microfilming installations "AKM-22", "AKM-44", "RUST-3" and projection units "UU-3", operating on 35 mm and 70 mm film.
 
  • Focal length: 100 mm (100.5 mm)
  • Relative opening: 1: 8
  • Field of view: 60 °
  • Frame size: 32 × 45.5 mm; 64 × 91 mm
  • Number of lenses / groups: 6/4
  • Limits of the diaphragm scale: 1:8-1:22
  • Number of diaphragm blades: 9 or 12
  • Front vertex focal length: -69.3 mm
  • Rear vertex focal length: 76.5 mm
  • Distance from first to last surface: 45.13 mm
  • Light diameter of the first surface: ∅32.9 mm
  • Luminous diameter of the last surface: ∅33.7 mm
  • Working length: 117 mm; 94.2 mm
  • Increase: 0.3-0.07 and 3.3-13.75
  • Resolution by TU (Mikrat-200, center / edge): 60/45 lines / mm
  • Light transmission coefficient: 0,8
  • Type of coating: single-layer, chemical
 
Connections:
  • the lens - ∅48 mm
  • for screw-in attachments - Sp. M49 × 0.75
  • for hanging attachments - ∅51.5 mm
  • Dimensions:
  • length of the lens - 51 mm
  • the largest diameter of the frame is ∅69 mm
 

Posted by: SharkDD   Date of publication: 19.10.2017


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