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Single Stroke V.S. Double Stroke


clifford.jj

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You're correct. But let me elaborate a little.

 

The two strokes are not two "full" strokes, but more like halves. Like the full stroke was cut into two from about the middle.

 

So is there any benefit of that? Well, you cannot take multiple exposures by just stroking it once, unfortunately. Both of the strokes both cock the shutter and advance the film halfway. You can leave it cocked and advanced halfway, though, so you can cock and advance it faster later without having to worry about shutter firing unintentionally in a bag for example.

 

I bought a DS one because I just happened to run into one, thinking that I can take it's drawbacks because the deal was good. For my surprise, I happen to like it, maybe even prefer over the single stroke. The movement of the lever is so small that it needs very little repositioning of your hand, your head and the camera etc. In other words, it's easier to keep your eye on the finder as you cock, which is a noticeable privledge compared to "regular" non-motor-driven cameras. And the cocking is not THAT slow. As I said, you don't need to twist your hand with a bunch of muscles, just your thumb a little.

 

I don't know if it's true but someone in the internet suggested that the double stroking system really does lengthen the life of the shutter. So they might be in good condition also. But they don't have all the features the single stroke ones had.

 

According to the serial number lists found in the internet the double strokes vary approximately as follows: The top plate is different in the very early ones. For some time they also didn't have the frameline selector lever (which I havent found useful anyway - has someone??). The next change was the film pressure plate, which changed from glass to metal. At the same time the shutter speeds changed to the current standard. Until then, they had one speed less: B-1-2-5-10-25-50-100-250-500-1000 compared to B-1-2-4-8-15-30-60-125-250-500-1000. There's also some olive colored ones. If I have understood correctly (from CRR Luton), the DS ones have three different versions of the rangefinders. Some of them don't focus quite as close, but at least some can be modified.

 

But none of the (unmodified) DS ones have:

- black colour

- the second type strap lug

- the DOF indicator available in some (or all?) of the single stroke ones

So no real big issues.

 

My DS is quite an early one, with the SN 784***.

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Last week at a camera collectors show I tried a DS for the first time, and I immediately noticed the very same advantages that you mentioned here. The stokes are not full strokes as when compared to a SS, and that seems to help keep the motion smoother. And as you said, less muscles contortion is required.

 

The movement of the lever is so small that it needs very little repositioning of your hand, your head and the camera etc. In other words, it's easier to keep your eye on the finder as you cock, which is a noticeable privledge compared to "regular" non-motor-driven cameras. And the cocking is not THAT slow. As I said, you don't need to twist your hand with a bunch of muscles, just your thumb a little.
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