Photo Cornucopia   Home    
 
Topic:

Fujinon EX Enlarging lenses

Author/Copyright:

John Jovic

Fujinon EX enlarger or enlarging lenses were released around 1986-87 and replaced the Fujinon EP line of enlarging lenses.

   
  Advertisement in the Sept/Oct 1987 issue of 'Darkroom and Creative Camera Techniques' magazine[1]

 

The above advertisement claims "Because our air-spaced element design increases the number of air-to-glass surfaces, thereby increasing corner sharpness and image quality over cemented element designs".

The data in table below was sourced from the Fujifilm Japan website (http://fujifilm.jp/personal/filmandcamera/film/monochrome/enlargement.html) and shows the specifications for various Fujinon EX enlarger/enlarging lenses. The original is in Japanese and has been translated into Engish and formatted into the table below.
 

  EBC Fujinon EX 50mm 1:2.8 II EBC Fujinon EX 75mm 1:4.5 EBC Fujinon EX 90mm 1:5.6 EBC Fujinon EX 105mm 1:5.6 EBC Fujinon EX 135mm 1:5.6
Focal Length (mm): 50 75 90 105  135
Maximum aperture (F): 2.8 4.5 5.6 5.6  5.6
Lens construction (group - elements):  4-6 4-6 6-6 6-6 6-6
Angle of coverage: 50 55 58 52  62
Recommended negative size (mm): 24 x 36 56 x 56 56 × 84  56 × 84  100 x 125
Minimum aperture (F): 16 22 32  32  45
Designed magnification: x 15 x 8 × 7  × 7  x 6
Useful magnification range: x2-20 x1.5-15 x1.5-15 x1.5-15 x1.5-10
Achromatized wavelength range (nm): 380-700  380-700 380-700 380-700 380-700
Distortion at basic magnification (%): 0.1 -0.1  -0.06 -0.05  -0.11
Focal length design value (mm): 51.8 77.2 91.9 106.2  136.8
Barrel outer diameter A (front) (mm): 54 54 54 54  64
Flange mount thread size: 39 P = 1/26 " 39 P = 1/26 " 39 P = 1/26 " 39 P = 1/26 " 53 P = 0.75
Filter size (mm) (data to be confirmed) 46 46 46 46 55
Barrel outer diameter B (rear) (mm):  40 40 40 42 54
flange focal length (mm):  38.5 68.6 82.1 95.2 121.2
Back focal length (mm):  30.1 62.1 74.8 86.1 111.2
Distance from flange surface to the second principal point (mm):  13.2 8.2 9.9 11.3 15.6
Principal point spacing (mm): -15.2 1.9 -2.3  -2.8  -3.5
Total length (mm): 40 40 40 42  54
Weight (g): 95 100 95 110 310


References

[1] Fujinon Lens Division/D.O. Industries, Inc., "Are you cutting corners with your Current lens?", Darkroom & Creative Camera Techniques Vol. 8, No. 5 (Sept/Oct 1987):
   
   
   

 
     
 
  Copyright 2015 Photo Cornucopia

Contact Terms