Prontor

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Disambiguation:

  • 1. Prontor is the new name of the shutter maker Gauthier.
  • 2. Prontor is a leaf shutter with a great range of speeds, introduced in 1935 by Gauthier.

The Prontor is a long-lived series of leaf shutters made by the German company Gauthier based in Calmbach.

The Prontor II exists with the following speed ranges:

  • T, B, 175, 100, 50, 25, 10, 5, 2, 1, not synchronized
  • 200, 100, 50, 25, 10, 5, 2, 1, B, T, synchronized

The Prontor-S is synchronized.

The Prontor-SV has dual M/X synchronization and exists with 1, 2, 5, 10, 25, 50, 100, 250, B speed range.

The Prontor-SVS has a common mechanism for the M/X synchronization and the self-timer.

The Prontor 125 is a self-cocking shutter, named after its maximum speed 1/125 sec. .

The Prontor 300 is also named after its max. speed, but needs cocking.

The Prontor 300 LK, Prontor 500 LK and Prontor 1000 LK are meter-coupled Prontors

The Prontor-SLK are fast flash synchronized meter-coupled shutters.

The Prontor-Mat-S was a shutter for early cameras with automatic exposure setting control.

The Prontor-Press is a so-called "press shutter". That means that it is a self-cocking flash synchronized large format leaf shutter. It has five shutter leaves and an additional five-leaves aperture. Its speed range is 1 sec. to 1/125 sec. and includes T and B mode. Speeds can easily be set stepwise by means of the setting ring around its front. It has a screw mount in either the front and the back since it's a shutter for lens kits with separate barrels for front and rear elements. The shutter's release lever can alternately be operated with a common remote cable.

The Prontor Press Electronic is an electronically controlled shutter, the Prontor magnetic another electrically driven one.

The Prontor Professional is a large format shutter with speeds from 1 to 1/125 sec. plus B. It has an additional cable release thread for an aperture release. It has lever to switch from stepless to stepwise aperture setting and facilities to connect aperture levers to a mechanical aperture remote control on the camera back.

Bibliography

  • Kamera no mekanizumu sono I: "Hai! Chīzu" Shunkan o torae-tsuzukeru shattā-ten (カメラのメカニズム・そのⅠ・「ハイ!チーズ」瞬間をとらえ続けるシャッター展, Camera mechanism, part 1 "Cheese!" Exhibition of instant taking shutters). Tokyo: JCII Camera Museum, 2002. (Exhibition catalogue, no ISBN number)

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