Canon Ftb: some general questions.

Discussion in 'Beyond the Basics' started by Marco120588, Oct 6, 2003.

  1. Marco120588

    Marco120588 TPF Noob!

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    My dad gave me his canon ftb camera in which he bought around 1976. It is in excellent condition. I have some general questions. What are the advantages of having a mirror lock up and how do you use it? On the aperature ring, there is a little button. On my telephoto lens it says "0" and on my regular lens it says "A". What is that button for?

    Thanks,
    Marco
     
  2. voodoocat

    voodoocat ))<>(( Supporting Member

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    Mirror lock up is very useful for long exposures. When you snap a photo on an SLR, the mirror flaps up creating vibrations and slightly blurs a photo.
     
  3. Marco120588

    Marco120588 TPF Noob!

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    But if the mirror is locked up, then wont the film be exposed before I even take the picture because of the light passing through the lens?
     
  4. voodoocat

    voodoocat ))<>(( Supporting Member

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    The film isn't exposed until the curtain opens. If you open the back of your camera to load the film, you will see a fabric curtain. That is your shutter.
     
  5. Marco120588

    Marco120588 TPF Noob!

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    Thanks for the info. Another question: Should I also keep the mirror locked up when changing lenses, or would it not matter?
     
  6. voodoocat

    voodoocat ))<>(( Supporting Member

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    I would keep the mirror down when cleaning lenses. you don't want dust going behind the mirror.
     

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