Shutter Cycle Limit

Discussion in 'Beyond the Basics' started by Vuorilla, Dec 7, 2009.

  1. Vuorilla

    Vuorilla TPF Noob!

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    I don't know if this is "beyond basics" or if it's simply a basic question.

    I have heard of a property called "shutter cycle durability", or something like that... I am not really sure about the exact name of it, but it basically puts a limit on the number of time a camera can be used until it breaks down.. or at least a part of it...

    But what I don't understand is, if the shutter is inside the lens, why does it affect the camera? :confused:

    Can someone explain to me this limit?

    Thank you!
     
  2. nickisonfire

    nickisonfire TPF Noob!

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    The shutter is inside the body...
     
  3. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    Because the shutter is not inside the lens. I think you are getting the aperture blades (which are inside the lens) confused with the shutter.

    The aperture blades are what open and close when you take a photo and control the amount of light which gets through the lens as well as the depth of field of the end shot - as shown by the aperture of the shot.

    The shutter curtain/blades are inside the camera body and are what control the exposure of the sensor to light in the camera - essentailly they do have a limited number of uses before they will break, however the actual life expctancy for any camera is only based on test data - they might break way before or way after their expected lifespan. And as is typical the higher range camera bodies do have better overall performance.

    Further the shutter can be replaced in the camera - at cost though - and often with lower end models, as they get older it becomes more cost effective to upgrade or find a working 2nd hand model since the repair cost becomes more than the worth of the working unit
     
  4. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Last edited by a moderator: Sep 11, 2014
  5. GeneralBenson

    GeneralBenson TPF Noob!

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    That guys sounds like a robot.

    Also, with the shutter video, at the end, the shutter is different than at the beginning. I've always wondering how the shutters reset back to original position.
     
  6. Josh66

    Josh66 Been spending a lot of time on here!

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    I think it just alternates between going up and down, but I could be wrong...
     
  7. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Nikon shutters reset. They start in the up position. after an exposure both curtains move back up at the same time so the image sensor doesn't get exposed during reset.

    Here's a stop motion sequence you can watch 1 frame at a time: http://regex.info/blog/2008-09-04/925

    You can see the curtain reset as the mirror comes back down.
     
    Last edited: Dec 7, 2009
  8. Vuorilla

    Vuorilla TPF Noob!

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    Thank you! Yes, I got the aperture blades confused with the shutter. Unfortunately, Youtube is blocked here in China, so I cannot watch the video... :-( But I will try to find some documentation about the shutter and the inner workings of a camera.
     
  9. Garbz

    Garbz No longer a newbie, moving up!

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    [​IMG]

    Photography 101.6 – Shutter Also lesson 5 was talking about the aperture, may be worth diving in and reading over a bit of this website.

    Note that not all shutters follow this order. Some don't reset and just travel back the opposite direction from what I have heard. But the principle is essentially the same.
     
  10. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    To be fair, some cameras do have the shutter as part of the lens and not the camera body. My Mamiya RB67 is like that.
     

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