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Murer et Duroni GL 20 |
 Version française |
Manufactured or assembled in Italy from (Before) 1909 to (After) 1909.
Index of rarity in France: Infrequent (among non-specialized garage sales)
Inventory number: 4466
See the complete technical specifications
Chronology of cameras Murer et Duroni
Ce Klapp est assez basique, son équipement est simple (obturateur circulaire), et il est fabriqué en Aulne, bois qui se travaille facilement, recouvert de faux cuir (le soufflet est cependant en peau).
La mise au point se fait par l'adjonction de lentilles.
Son nom, GL20, nous indique qu'il est au format 9 x 12, que c'est un modèle à plaque simplifié et que l'objectif est un Murer Aplanat ouvrant à 8. La présence du 2 ne s'explique pas.
At Murer and Duroni, Klapp cameras are divided into two major families: those with a focal plane shutter and those with a central shutter. They are then classified using a nomenclature consisting of 2 to 4 letters or numbers.
Focal plane shutter:
| First letter | Second letter | Third and fourth letter | |||||||
| D | Fixed front face | U | 4,5 x 6 | 2 | Anastigmat | Murer | f/7 | ||
| F | Platine avant à décentrement | N | 6,5 x 9 ( O from 1914) | M | Anastigmat | Murer | f/6,5 | ||
| L | 9 x 12 ( E from 1920) | T | Anastigmat | Murer | f/3,6 | ||||
| C | 9 x 14 | E | Anastigmat | Murer | f/5,5 | ||||
| K | 10 x 15 | R | Anastigmat | Murer | f/4,5 | ||||
| H | 13 x 18 | 0 | Aplanat | Murer | f/8 | ||||
| W | 45 x 107 mm (Stereo) | Si | Anastigmat | Koristka Sideran | f/4,5 | ||||
| S | 6 x 13 (Stereo) | Ke | Anastigmat | Koristka Equator | f/5,5 | ||||
| Ka | Anastigmat | Koristka Meridian | f/6,8 | ||||||
| K | Anastigmat | Koristka Doppio Gauss | f/5,5 | ||||||
| 3 | Anastigmat | Goerz Dagor | f/6,8 | ||||||
| 4 | Anastigmat | Sintor | f/6,8 | ||||||
| B | Anastigmat | Berthiot Olor | f/5,7 | ||||||
| S | Anastigmat | Suter | f/5 | ||||||
| L | Anastigmat | Roussel | f/4,5 | ||||||
| Z | Anastigmat | Zeiss Iena | f/4,5 | ||||||
| 1 | Anastigmat | Zeiss Koristka Tessar | f/6,3 | ||||||
| 5 | Anastigmat | Primus | f/7 | ||||||
Central shutter:
| First letter | Second letter | Third letter or number | |||||
| U | 4,5 x 6 | L | Plate (simple) | 0 | Aplanat | Murer | f/8 |
| N | 6,5 x 9 | F | Film-pack | 2 | Anastigmat | Murer | f/6,8 |
| G | 9 x 12 | G | Film | 3 | Double anastigmat | Goerz Dagor | f/6,8 |
| W | 4,5 x 10,7 (Stereo) | P | Plate and film-pack (premium) | M | Anastigmat | Murer | f/6,5 |
| S | 6 x 13 (Stereo) | T | Plate (economical) | S | Anastigmat | Suter | f/6,8 |
| I | 6 x 13 panoramique | M | Plate (metal) | ||||
| A | 4 x 5 | ||||||
| O | 4 x 6,5 | ||||||
Klapp cameras with a central shutter can come in three different finishes: economical, standard, or premium.
In the "economical" version, the body is made of alder wood and covered with imitation leather. The viewfinder is integrated into the front plate. The shutter offers only P (Time) and I (Instant) settings. The shutter is of the sector type. The metallic parts are oxidized. Its lens is achromatic. There is only one model of this type, which is a UT.
In the "standard" version, the body is made of aluminum and brass covered with morocco leather.
In the "premium" version, the body is made of aluminum and covered with morocco leather. A mechanism allows for moving the front plate forward to focus from 1.5 meters to infinity. The viewfinder is mounted on the sliding lens cover. The shutter speed can be adjusted to 1/25, 1/50, and 1/100.
(source Malavolti)
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