Difference between revisions of "Leaf shutter"
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== Pros == | == Pros == | ||
| − | * Leaf shutters can [[flash sync|synchronise a flash]] at any available shutter speed. | + | * Leaf shutters can [[flash sync|synchronise a flash]] at any available shutter speed.<ref>This is particularly true when elecronic flashes connected to the X sync socket are concerned. Flash bulbs of different types, with different time to peak, various flash duration and connected to different sync sockets (e.g. X, M or F) have certain limitations in this aspect.</ref> |
* They are generally more compact and less noisy than [[focal plane shutter|focal plane shutters]]. | * They are generally more compact and less noisy than [[focal plane shutter|focal plane shutters]]. | ||
| + | * They do not distort moving objects. | ||
== Cons == | == Cons == | ||
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* Leaf shutters are typically not capable of shutter speeds as high as modern [[focal plane shutter|focal plane shutters]]; usually the highest speed possible with a leaf shutter is 1/500th of a second. | * Leaf shutters are typically not capable of shutter speeds as high as modern [[focal plane shutter|focal plane shutters]]; usually the highest speed possible with a leaf shutter is 1/500th of a second. | ||
* Cameras using leaf shutters must either have a shutter in each lens, like the [[Hasselblad]] 500, or have the shutter in the camera body, which limits the range of possible focal lengths and the maximum aperture, like the [[Paxette]]. | * Cameras using leaf shutters must either have a shutter in each lens, like the [[Hasselblad]] 500, or have the shutter in the camera body, which limits the range of possible focal lengths and the maximum aperture, like the [[Paxette]]. | ||
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| + | ==References== | ||
| + | <references /> | ||
{{br}} | {{br}} | ||
Revision as of 21:54, 10 May 2009
A leaf shutter is a shutter as found in certain cameras, using of a small number of identical overlapping metal blades, called the leaves, to open and close in order to expose a photograph. It is usually placed near the iris within the camera lens. The leaves are arranged in a circular pattern, suitably pivoted near the housing periphery, and made to move in a rapid oscillating fashion such that they together uncover the common central area for a predetermined period of time, enabling picture to be taken. The shutter mechanism is governed by a clockwork mechanism and powered by a strong spring tensioned by setting the shutter before each exposure. The delay between opening and closing the blades determines the exposure time which usually may be adjustable within a limited rang for the photographer to choose from. The shutter may be equipped with a delay action mechanism which, when set and released, triggers the shutter after a short period of time, in the region of 10 seconds. A threaded socked my also be present for attaching a wire release for the photographer’s convenience.
The leaf shutter allows synchronising flash at every available shutter speed, due to the fact that the whole picture area is exposed simultaneously, which is not always the case using the focal plane shutter.
The manufacture of leaf shutters is highly specialized, and usually not made by the camera makers them selves. Common types of shutters are the German Compur and Prontor, and the Japanese Copal.
Depending on the way the shutter is arranged with respect to the lens, it is referred to as "between-lens" or "behind the lens" shutter.
Contents
Pros
- Leaf shutters can synchronise a flash at any available shutter speed.[1]
- They are generally more compact and less noisy than focal plane shutters.
- They do not distort moving objects.
Cons
|
| old shutter of a Contaflex |
- Leaf shutters are typically not capable of shutter speeds as high as modern focal plane shutters; usually the highest speed possible with a leaf shutter is 1/500th of a second.
- Cameras using leaf shutters must either have a shutter in each lens, like the Hasselblad 500, or have the shutter in the camera body, which limits the range of possible focal lengths and the maximum aperture, like the Paxette.
References
- ↑ This is particularly true when elecronic flashes connected to the X sync socket are concerned. Flash bulbs of different types, with different time to peak, various flash duration and connected to different sync sockets (e.g. X, M or F) have certain limitations in this aspect.
