Leitz Wetzlar Xenon 50mm F/1.5
Standard prime lens • Film era • Discontinued
- Announced:
- · 1936
- Production status:
- ● Discontinued
- Country of design:
- · German Reich
- Original name:
- · Leitz Xenon f=5cm 1:1,5 D.R.P.a. Taylor-Hobson U.S.Pat.2019985
- · Leitz Xenon f=5cm 1:1,5 D.R.P.
- Order No.:
- · XEMOO
- Class:
- · Fast full-frame standard prime lens
- System:
- · Leica SM (1930)
Model history (11)
Specification
Optical design: | |
35mm full frame | |
50mm | |
F/1.5 | |
7 elements in 5 groups (Double Gauss derivative) | |
Leica screw mount | |
46.8° (35mm full frame) | |
Diaphragm mechanism: | |
Diaphragm type: | Manual |
Aperture control: | Aperture ring |
6 (six) | |
Focusing: | |
Coupled to the rangefinder: | Yes |
1m | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing lever |
Physical characteristics: | |
300g | |
<No data> | |
Accessories: | |
Slip-on 51mm | |
XIOOM |
Source of data
- Own research.
From the editor
A lens based on the optical design patented by H.W. Lee of Taylor, Taylor and Hobson Ltd. in Britain (1932) and in the US (1935). It is a double Gauss design with splitted rear positive element.
Leitz claimed that it was a Leitz design, and in 1934 the company was even granted a German patent for this lens.
T.T.H. granted Schneider a licence to make and sell lenses according to their patented design. Schneider in turn would have been allowed to sublicence to other German companies.
It appears that Schneider and Leitz had been working separately on improvements to T.T.H. design, and then later agreed to work together. Leitz needed agreement from Schneider to use the T.T.H.'s principle of the split rear element and agreed to name their lens Xenon, a Schneider name, in return for Schneider not opposing the Leitz 1934 patent. Since T.T.H. had no German patent, only the licensing agreement with Schneider, it was only necessary to engrave the British and US patent numbers on the Xenon lenses intended for export.
The lens is uncoated, except for some lenses made during the war that were factory coated.
Collapsible lens hood XIOOM serves as a lens cap when folded.
Notes
- All LEICA lenses having a focusing lever are automatically locked at the infinity position. This feature enables the camera to be used for infinity scenes and subjects without danger of the lens becoming accidentally out of focus due to unintentional movement. To release the lever for focusing on nearer planes press the knob at the end of the lever.
Other standard prime lenses in the Leica SM system
■Leica screw mount (11) | |||||||||
Leitz Elmar 50mm F/3.5 [I] [ELMAR, ELMARKUP, ELMARCHROM] • Collapsible | M | 4 - 3 | 1.00m | A36 | 1930 ● | ||||
Leitz Elmar 50mm F/3.5 [II] [ELMAR] • Collapsible | M | 4 - 3 | 1.00m | A36 | 1951 ● | ||||
Leitz Wetzlar Elmar 50mm F/3.5 [III] [ELMAR / 11010] • Collapsible | M | 4 - 3 | 1.00m | E39 | 1954 ● | ||||
Leitz Wetzlar Elmar 50mm F/2.8 [I] [ELMOO / 11512, ELMOO / 11012] • Collapsible | M | 4 - 3 | 1.00m | E39 | 1957 ● | ||||
Leitz Hektor 50mm F/2.5 [HEKTO, HEKTORKUP, HEKTOCHROM] • Collapsible | M | 6 - 3 | 1.00m | A36 | 1931 ● | ||||
Leitz / Leitz Wetzlar Summar 50mm F/2 [SUMAR, SUMARKUP, SUMARCHROM] | M | 6 - 4 | 1.00m | A36 | 1933 ● | ||||
Leitz / Leitz Wetzlar Summar 50mm F/2 [SUMUS, SUMUSKUP, SUMUSCHROM] • Collapsible | M | 6 - 4 | 1.00m | A36 | 1934 ● | ||||
Leitz / Leitz Wetzlar Summitar 50mm F/2 [SOORE / 11015] • Collapsible | M | 7 - 4 | 1.00m | E36.4 | 1939 ● | ||||
Leitz Wetzlar Summicron 50mm F/2 [I] [SOOIC / 11016] • Collapsible | M | 7 - 6 | 1.00m | E39 | 1953 ● | ||||
Leitz Wetzlar Compur-Summicron 50mm F/2 (150 units) | M | ? - ? | 1.00m | 1954 ● | |||||
Leitz Wetzlar / Leitz Canada Summarit 50mm F/1.5 [SOOIA / 11020] | M | 7 - 5 | 1.00m | E41 | 1949 ● |