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Komuranon-E Enlarging Lenses

Author/Copyright:

John Jovic

Komuranon enlarger or enlarging lenses were made by Komura Lens MFG. LTD. The Komuranon-E line of lenses included 3.5/50, 5.6/75, 5.6/90, 5.6/105, 5.6/135 and 5.6/150mm lenses and preceded the Komuranon-S line of enlarging lenses.

This advertisement was published in Australian Photography Photo Directory 1975[1]

According to the advertising clipping above 'All Komuranon lenses are multicoated.'

This is a crop from the above advertisement showing Komuranon-E enlarging lenses.

The brochure below shows the front and rear pages of the Besler Photo Marketing Co. brochure for the Komuranon-E lenses. The exact date of the brochure is not know but probably around the early to mid 1970's. Note that only the 50, 75 and 105mm lenses are shown. The brochure was kindly supplied by Chuckp from the Analog Photography Users Group forum (APUG).

Two page pamphlet or sales brochure published by Beseler Photo Marketing CO., INC (date unknown) to advertise the Komuranon-E enlarging lenses[2]

Specifications

The specifications from the above Beseler Photo Marketing brochure have been transcribed to the table below. Where specifications are provided from other sources they are referenced accordingly.

  3.5/50mm "E"[2] 5.6/75mm "E"[2] 5.6/90mm
"E"[pc]
5.6/105mm
"E"[2]
5.6/135mm
"E"[3]
5.6/150mm
"E"[3]
Focal Length (mm): 50 75 90 105 135 150
Maximum aperture (F): 3.5 5.6 5.6 5.6 5.6 5.6
Lens construction (elements - groups): 6-4 6-4   6-4    
Angle of coverage:         56 56
Recommended negative size (mm): 24 x 36 2.25"x2.25"   2.25"x3.25"    
Minimum aperture (F): 22 22 22 22 22 22
Designed magnification:            
Useful magnification range:            
Achromatized wavelength range (nm):            
Distortion at basic magnification (%):            
Focal length design value (mm):            
Barrel outer diameter A (front) (mm):            
Flange mount thread size: Leica Leica Leica Leica Leica Leica
Filter size (mm) None[pc]   M40.5x0.5[pc] None[pc]    
Barrel outer diameter B (rear) (mm):             
flange focal length (mm):             
Back focal length (mm):             
Distance from flange surface to the
second principal point (mm): 
           
Principal point spacing (mm):            
Total length (mm):            
Weight (g): 112 93   132    
Coating: Quadra-Coated Quadra-Coated   Quadra-Coated    

Example of a Komuranon-E enlarging lens

All the Komuranon-E lenses are of the same basic construction, they all look alike. The images below are of a typical Komuranon-E lens, in this case a Komuranon-E 90mm F5.6.

Komuranon-E 5.6/90 enlarging lens (photographed with a Yashica 3.5/40 enlarging lens on a Canon 5D2)

 

Komuranon-E 5.6/90 enlarging lens shown with aperture wide open (photographed with a Yashica 3.5/40 enlarging lens on a Canon 5D2)

 

Komuranon-E 5.6/90 enlarging lens shown with aperture stopped down two stops to F11 (photographed with a Yashica 3.5/40 enlarging lens on a Canon 5D2)

 

Komuranon-E 5.6/90 enlarging lens (photographed with a Yashica 3.5/40 enlarging lens on a Canon 5D2)

 

Komuranon-E 5.6/90 enlarging lens (photographed with a Yashica 3.5/40 enlarging lens on a Canon 5D2)

 
References
[1] Photape Pty.Ltd/Haldex Pty.Ltd, Lenses?Lenses? (Sydney, The Globe Publishing Co. Pty.Ltd., 1975)
Photape Pty.Ltd/Haldex Pty.Ltd, "Lenses?Lenses?", Australian Photography Photo Directory 1975, (1975): 20-21
[2] Beseler Photo Marketing CO., INC, Introducing Komuranon E (U.S.A., Beseler Photo Marketing CO., INC, nd)
[3] "Photographic Lenses", Australian Photography Photo Directory 1975, (1975): 186
[pc] Photo Cornucopia. Measured or personally observed by the Author.
   

 

     
 
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