Fast lens

Discussion in 'Photography Beginners' Forum' started by misia, Nov 3, 2008.

  1. misia

    misia TPF Noob!

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    Hi.

    What is......fast lens?? Not sure about that.

    Thanks
    Monika
     
  2. Josh66

    Josh66 Been spending a lot of time on here!

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  3. benhasajeep

    benhasajeep TPF Noob!

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    Refers to lenses with large aperatures. Example lenses with max aperatures of f2.8, f1.4. They let in more light so they allow faster shutter speeds (or other exposure settings) for given light conditions than slower lenses like a f4.0 or f5.6.
     
  4. davebmck

    davebmck TPF Noob!

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    A fast lens is a lens with a wide maximum aperture (small number). It means you can get in more light in low light situations and therefore use a higher shutter speed for a given lighting situation.
     
  5. misia

    misia TPF Noob!

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    Thanks for the info - I get it now.
     
  6. Dao

    Dao No longer a newbie, moving up!

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    If you want more information related to "Fast lens", you should be able to find more on the net.

    For Example: here
     
  7. Village Idiot

    Village Idiot No longer a newbie, moving up!

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    A fast lens is the Canon 50mm f/.095
     
  8. Helen B

    Helen B TPF Noob!

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    That would be a typo for f/0.95. The fastest lens that is theoretically possible would be an f/0.5. In practice the fastest camera lens I'm aware of is an f/0.7 - famously used by Stanley Kubrick for Barry Lyndon.

    Best,
    Helen
     
  9. Village Idiot

    Village Idiot No longer a newbie, moving up!

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    It was. 50 mm f/.95
    Is is Leica that makes the 50mm f/.90?
     
  10. Helen B

    Helen B TPF Noob!

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    The new 50 mm Noctilux is an f/0.95 lens. The old one was an f/1. It's a bit of marketing hype to an extent. There have been quite a few lenses around f/1, especially for motion picture use. Angenieux made a couple of f/0.95 lenses, Zeiss have made a few around f/1.1 and Kern have made at least one at f/0.9. I've made a few films with those lenses, using them wide open mostly.

    Best,
    Helen
     
    Last edited: Nov 5, 2008

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