A question of shutter spring.

[shaozhuohong]

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Hi,

My habit is push the film advance lever immediately after each shot, to prepare for the next shot. However, sometimes the “next shot” might be in a week later. Thus, I think during the week, the shutter spring is keeping tight, so will my habit make the shutter less accurate.

 

 

 

A, after each shot, pushes the film advance lever immediately to prepare for the next shot.

B, before each shot, pushes the film advance lever, then shot（without preparation）.

 

 

Thanks！

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[kenneth]

Hi,

My habit is push the film advance lever immediately after each shot, to prepare for the next shot. However, sometimes the “next shot” might be in a week later. Thus, I think during the week, the shutter spring is keeping tight, so will my habit make the shutter less accurate.

 

 

 

A, after each shot, pushes the film advance lever immediately to prepare for the next shot.

B, before each shot, pushes the film advance lever, then shot（without preparation）.

 

 

Thanks！

 

I do exactly the same on my M6's it is not a problem they are designed to cope with this and it wont make your shutter less accurate if you continue in that mode

[enboe]

I advance out of reflex after every shot. I've never had a problem with shutter accuracy because of it. The biggest issue for accuracy is to exercise the shutter occasionally across all of the speeds. That will help keep it within 10%, but even that is not really necessary.

 

Enjoy.

[adan]

Releasing the shutter only unwinds a small percentage of the spring tension - otherwise the shutter would "run down" as it crosses the frame, and produce uneven exposures.

 

So the strain on the spring changes very little from "cocked" to "uncocked" - in Leica-style focal-plane shutters. Leaf shutters in lenses may have a different dynamic.

 

In my film days I always recocked the shutter immediately.

[ho_co]

In the Leica M shutter, the difference between cocked and uncocked is less than 25% of the shutter spring's tension range.

 

Good that you give it a thought, shaozhuohong, but as others have said, winding on after making an exposure:

a) is natural;

is standard practice; and

c) makes no discernable difference to the shutter's lifespan.