Fast Lens?

Discussion in 'Photography Beginners' Forum' started by ababysean, Jun 20, 2010.

  1. ababysean

    ababysean TPF Noob!

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    I am hearing this more and more?

    What does this mean?

    Like on the judge joe video (haha) he was asking where her fast lens was? and kind of making fun of her for only having the 18-55 lens....

    What is the fast lens?

    I have the 18-55 and the 50-200

    What is the next lens I should get?
     
  2. mwcfarms

    mwcfarms No longer a newbie, moving up!

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    A fast lens is one that is generally F1.4, F1.8, F2.8 since they work even in low light and the kit lens are F3.5 to F5.6 I think.
     
  3. KmH

    KmH Helping photographers learn to fish Supporting Member

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    A 'fast lens' can open to a wide aperture, which allows you to use a faster shutter speed.

    Lenses that have a minimum aperture of f/2.8 and larger (f/1.8, f/1.4, f/1.2) are considered 'fast'.

    Lenses that have a maximum aperture of f/3.5 or less (f/4, f.5.6, f/8) are considered slow lenses
     
  4. Josh66

    Josh66 Been spending a lot of time on here!

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    ^^^Yes. A "Fast" lens is a lens with a large maximum aperture. (That would be a smaller f/#.)

    They call it a fast lens because this larger aperture lets more light in, allowing you to use a faster shutter speed.

    Generally, primes will always be faster than zooms.



    edit
    lol, posted at the same time as you, Keith
     
  5. Dao

    Dao No longer a newbie, moving up!

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    A fast lens is a lens that has a large max. aperture. Larger aperture allows more light entering the camera so that the photographer can take a photo with a faster shutter speed.


    Example.
    Canon EF 50mm f/1.2L lens is faster than Canon EF 50mm f/1.4 USM lens which is faster than Canon EF 50mm f/1.8 mkII which is faster than Canon EF 50mm f/2.5 Macro lens.

    EDIT: Man! I need to type faster.
     
  6. ababysean

    ababysean TPF Noob!

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    so for a newbie, with a NikonD3000 what is the most affordable fast lens?
     
  7. Josh66

    Josh66 Been spending a lot of time on here!

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  8. taraj_00

    taraj_00 TPF Noob!

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    I would say the 35mm 1.8 AF-S for the D3000! It worked wonderfully with my D40, and it's stuck in the D300 now- still loving it.

    It's fairly cheap too- right at 200$

    ETA: The lens the pp linked too isn't AF-S and will not autofocus on the D3000.
     
  9. ababysean

    ababysean TPF Noob!

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    the 35mm is a choice, I really want the 50mm but the AF-s version is over 500 dollars.
     
  10. taraj_00

    taraj_00 TPF Noob!

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    For me, when I'm in the house, 50mm (having tried the focal length out on my 18-55 kit lens) was just a little too long to give me much manuvering room. For me, the 35 usually works about right so that I'm not backing up into walls!
     
  11. dak1b

    dak1b TPF Noob!

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    50mm 1.4 ftw
     
  12. Derrel

    Derrel Mr. Rain Cloud

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    A fast lens is one that will let you shoot it on the very first day...
    A fast lens is one that has had a lot of owners...
    A fast lens is one that will let you shoot and then download the photos--immediately...
    A fast lens is one people often talk about behind its back,and not in a good way...
     

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