In the theory of digital radio engineering, there is the concept of synchronous and asynchronous devices. In order to explain, I must deviate a little in my reasoning. This option has a reasonable complexity of design and a fairly wide range of exposures.Īnd here I want to ask one question: so what are the advantages of the Zeiss shutters shown above? Why do they, developed almost a century ago, continue to be used in old cameras? They seem to be complex and should be unreliable. Or, in other words, the Contax II shutter with a set of Zeiss Super Nettel delayers. Which of all shutters seems to me the best? I would choose the Zeiss Super Nettel version with the option of curtain coupling from Contax II. Here are three governors, each acting at different speeds. When we consider the steps in the evolution of this shutter, then everything becomes clear and logical, however. This is how through successive upgrades, a mechanical nightmare was reached, the order incomprehensible for a novice repairer. For reaching the Contax II shutter one more step was needed – the addition of more slow speeds delayers. The selecting of speeds works from the cocking head located on top. It works in two modes, light delaying for 1/25 and 1/50 speeds and strong delay for 1/10 and 1/5 speeds. A two-mode slow-speeds governor has appeared. But the mechanism has become a little more complicated. Even the same mechanism for locking the curtain in the upper position. The same shutter frame, the same curtains, the same curtain drums. And the next step is the complication of the shutter by adding a slow speeds governor. Obviously, Contax wanted to make a device of a higher class.
The shutter contains curtains drums, curtain latch and several gears. Yes, this is a Contax shutter without slow shutter speeds. In the beginning there was Contax I without slow shutter speeds. It was necessary to circumvent patent restrictions. We know for sure that Contax tried to make a camera completely different from Leica. Let’s follow the stages of consistent development. Many people have a question in their heads: “How can this even be invented?” KF article top A Contax rangefinder from the 1930s, shutter not pictured (Pic Justin Jakobson/Flickr)Īnyone who disassembled old Kiev or Contax has seen a complex structure of gears, all constituting an intricate mechanism.
0 kommentar(er)
