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Thread: Mirror Lock Up feature

  1. #1

    Default Mirror Lock Up feature

    I am learning more and more stuffs about my cam day by day. Just now, I came across the topic of mirror lockup feature, but I wonder for those of you who uses slow high tele lenses got bother to use the MLU feature of your cam or not? Does it really makes a difference? Say if I use a slow lens and shoot at the standard shuttle range (1/60~1/250), will confirm get blur pixs one?

  2. #2

    Default Re: Mirror Lock Up feature

    MLU good for taking firework

  3. #3
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    Default Re: Mirror Lock Up feature

    MLU is good for static objects. once MLU is engaged, you cannot focus anymore so if subject moves it will be OOF. MLU wil reduce vibration caused by the slapping of the mirror. This is greatly magnified with longer telephoto lenses.

  4. #4

    Default Re: Mirror Lock Up feature

    when mirror flips up it bangs at the end of the movement against the camera body. This stopping of the mirror is more or less damped depending of the camera body, in any way it introduces vibrations into the body which will cause motion blur. This is particularly visible on long telephoto lenses and for macro photograpy. mirror lock up allows you to flip the mirror, calm down the camera and then to release the shutter...

  5. #5

    Default Re: Mirror Lock Up feature

    Quote Originally Posted by ihub88 View Post
    MLU good for taking firework
    hmmm...but with MLU the activation of the shuttle will be slowed down also and when taking firework isn't speed a criteria? sorry i am a newbie maybe I am wrong.
    Last edited by noobie; 15th May 2007 at 05:55 PM.

  6. #6

    Default Re: Mirror Lock Up feature

    Quote Originally Posted by noobie View Post
    hmmm...but with MLU the activation of the shuttle will be slowed down also and when taking firework isn't speed a criteria? sorry i am a newbie maybe I am wrong.
    Why should it be slower?

  7. #7
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    Default Re: Mirror Lock Up feature

    The main function of mirror lock up is to reduce vibration of the mirror slamming while making exposure
    For extreme close up, super long tele, any vibration will affect image quality, hence using mirror lock up is recommended.
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  8. #8
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    Default Re: Mirror Lock Up feature

    Quote Originally Posted by jmmtn4aj View Post
    Why should it be slower?
    I think what he meant was that the reaction to shoot the firework will be delayed. 1st press to MLU, wait for a while for cam to calm dowm den 2nd press to release the shutter. For MLU to work, you have to wait 1 to 2 seconds between the 1st and 2nd shutter release.

  9. #9
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    Default Re: Mirror Lock Up feature

    Quote Originally Posted by DeSwitch View Post
    I think what he meant was that the reaction to shoot the firework will be delayed. 1st press to MLU, wait for a while for cam to calm dowm den 2nd press to release the shutter. For MLU to work, you have to wait 1 to 2 seconds between the 1st and 2nd shutter release.
    is there a way to keep that mirror up all the time?

  10. #10

    Default Re: Mirror Lock Up feature

    Quote Originally Posted by ExplorerZ View Post
    is there a way to keep that mirror up all the time?
    All the time? Yes, of course, revert back to PnS cam Sorry just kidding

  11. #11

    Default Re: Mirror Lock Up feature

    Quote Originally Posted by jmmtn4aj View Post
    Why should it be slower?
    Precisely as DeSwitch had explained. If you use MLU, the shuttle will be on hold for a while to let the vibration fully diminished.

  12. #12
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    Default Re: Mirror Lock Up feature

    How so?

    e.g. Bulb mode. One press mirror locks up. Wait for the right moment. One press the shutter opens. One press the shutter closes.

    As mentioned, the application of MLU is limited to shooting subjects that don't require you to move your camera to track it. Nor should there be any "rush".

    If you need to track it, e.g. shooting fast action sports, you would already be using a fast shutter speed, thus, the effects of mirror slap would be far less pronounced. At any rate, you need to be able to see through your VF all the time, so you can't possibly be locking up the mirror to take your shot.

  13. #13
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    Default Re: Mirror Lock Up feature

    Quote Originally Posted by Yatlapball View Post
    How so?

    e.g. Bulb mode. One press mirror locks up. Wait for the right moment. One press the shutter opens. One press the shutter closes.

    As mentioned, the application of MLU is limited to shooting subjects that don't require you to move your camera to track it. Nor should there be any "rush".

    If you need to track it, e.g. shooting fast action sports, you would already be using a fast shutter speed, thus, the effects of mirror slap would be far less pronounced. At any rate, you need to be able to see through your VF all the time, so you can't possibly be locking up the mirror to take your shot.

    Yup.. true. My bad, I totally missed this sequence.

  14. #14
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    Default Re: Mirror Lock Up feature

    Quote Originally Posted by ExplorerZ View Post
    is there a way to keep that mirror up all the time?
    tot is always "up" if u dun go menu "deactivate MLU"

  15. #15
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    Default Re: Mirror Lock Up feature

    Quote Originally Posted by noobie View Post
    Precisely as DeSwitch had explained. If you use MLU, the shuttle will be on hold for a while to let the vibration fully diminished.
    Errr..., first, if you don't mind a little correction. Shutter (speed) and not shuttle.

    If you use MLU for taking shoot (there is MLU for cleaning the sensor), shutter speed no need to change. What you need is delayed time between MLU and shutter release (thus activated shutter curtain for shutter speed time). For camera with no delayed shutter release, you can cover your lens with hat first for 1 or 2 seconds to allow vibration settle down before sensor exposed to scene. Yes, this method (with hat or something to cover front of lens) need you to give extra time for exposure (increase shutter speed by 1 or 2 seconds depend on how long you will delayed the exposure).

    Regards,
    Arto.

  16. #16

    Default Re: Mirror Lock Up feature

    where can i find it in 400D for mirror lock up feature?
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  17. #17
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    Default Re: Mirror Lock Up feature

    Quote Originally Posted by totoro17 View Post
    where can i find it in 400D for mirror lock up feature?
    Read the manual.

    http://www.juzaphoto.com/eng/article...our_photos.htm

  18. #18

    Default Re: Mirror Lock Up feature

    Quote Originally Posted by Artosoft View Post
    Errr..., first, if you don't mind a little correction. Shutter (speed) and not shuttle.

    If you use MLU for taking shoot (there is MLU for cleaning the sensor), shutter speed no need to change. What you need is delayed time between MLU and shutter release (thus activated shutter curtain for shutter speed time). For camera with no delayed shutter release, you can cover your lens with hat first for 1 or 2 seconds to allow vibration settle down before sensor exposed to scene. Yes, this method (with hat or something to cover front of lens) need you to give extra time for exposure (increase shutter speed by 1 or 2 seconds depend on how long you will delayed the exposure).

    Regards,
    Arto.
    sorry, i have been thinking of space shuttle. Does using a hat really works? I mean there is ambient light, won't it affect your photo as some light might "leak" into the sensor? I dunno lah, just wondering

  19. #19

    Default Re: Mirror Lock Up feature

    Quote Originally Posted by totoro17 View Post
    where can i find it in 400D for mirror lock up feature?
    it is in the setup no.2 tab under "Custom functions". There you go!

  20. #20
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    Default Re: Mirror Lock Up feature

    Quote Originally Posted by noobie View Post
    sorry, i have been thinking of space shuttle. Does using a hat really works? I mean there is ambient light, won't it affect your photo as some light might "leak" into the sensor? I dunno lah, just wondering
    Yah..., mostly hat trick is only work for firework shoot. For macro shoot, or sometimes landscape shoot, it is better to find camera with MLU and delayed shutter release.

    If your camera only have 2s delayed shutter release, it can help to prevent/reduce shake because pressing shutter release, but not help shaking from mirror flap.

    I agree to improving good technique holding camera and press shutter release. Usually I use flash to freeze the motion, and it help.

    Regards,
    Arto.

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