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Minolta C.E. Rokkor-X Enlarging Lenses |
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Author/Copyright:
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John Jovic
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Minolta 'C.E. Rokkor-X'
enlarger or enlarging lenses were sold in the mid 1970's[1]. The range consisted of
just three lenses, 2.8/30, 2.8/50 and 5.6/80 lenses.
Other variations of Minolta enlarging lenses are labelled 'C.E. Rokkor'
and 'C.E. Lens' where in both cases the lettering is entirely printed in
white with none of the lettering printed in orange.
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This advertisement was
published in Camera and Cine '77, published in 1977. |
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The above
Specification or Data Sheet was supplied with a Minolta C.E. Rokkor-X
enlarging lens. |
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Specifications
The information in the above data sheet[2] has been transcribed into the
table below.
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C.E. Rokkor-X
F2.8 30mm |
C.E. Rokkor-X
F2.8 50mm |
C.E. Rokkor-X
F5.6 80mm |
| Focal Length (mm): |
30 |
50 |
80 |
| Maximum aperture (F): |
F2.8 |
F2.8 |
F5.6 |
| Lens construction (elements - groups): |
5/6 |
5/6 |
6-4 |
| Type |
Variant Gauss |
Variant Gauss |
Orthometar |
| Angle of coverage: |
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| Recommended negative size (mm): |
13x17 |
24x36 |
60x70 |
| Minimum aperture (F): |
F16 |
F22 |
F45 |
| Illuminated Aperture Scale |
Yes |
Yes |
Yes |
| Designed magnification: |
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| Useful magnification range: |
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| Achromatized wavelength range (nm): |
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| Distortion at basic magnification (%): |
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| Focal length design value (mm): |
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| Barrel outer diameter (mm): |
55 |
55 |
55 |
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Flange mount thread size: |
Leica |
Leica |
Leica |
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Filter size (mm) |
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| flange focal length (mm): |
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| Back focal length (mm): |
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| Total length (mm): |
50.4 |
42 |
37.8 |
| Weight (g): |
130 |
160 |
155 |
| Coating: |
Amber |
Amber |
Amber and Magenta |
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References |
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[1] |
Photoimport (Aust) Pty Ltd, "Cool. Silent. Sharp", Camera and
Cine '77 (1977): 224 |
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[2] |
Minolta Camera Co., Ltd., C.E. Rokkor-X Lenses
For Enlargers (Japan, nd) |