ef17-40mm f/4L USM Canon

Discussion in 'Photography Equipment & Products' started by Dryfly, Jul 13, 2008.

  1. Dryfly

    Dryfly TPF Noob!

    Joined:
    Jun 22, 2008
    Messages:
    33
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit
    Hi i have just bought a canon 40D body only and am about to invest in a lens.

    I am looking at a lens for landscape photography and was recommended the ef17-40mm f/4L USM, can someone please explain what all that means?? I am new and I am sorry but it does not mean anythhing to me.

    ef ? 17-40mm ? f/4 ? L ? (why is it red?) USM ?

    is it a "fast" lens? and what is the zoom?

    any help would be gratefully appreciated and I would like to understand it before I buy it and will it be fine for landscape as recommended?

    thank you.
     
  2. reg

    reg TPF Noob!

    Joined:
    May 28, 2008
    Messages:
    1,487
    Likes Received:
    1
    Location:
    Stuck inside of Mobile with the GTFO Blues Again
    Can others edit my Photos:
    Photos OK to edit
    EF is the lens mount.

    17-40 is the zoom.

    f/4 is the maximum aperture.

    L originally stood for "aspherical" *well, really, early in the EOS timeline it was AL, then just aspherical, then the aspherical ones became called L. Now it's generally understood to mean "luxury".

    USM = UltraSonic Motor

    It's not terribly fast, but it's not horribly slow either, for a wide angle lens.

    You should really read up on the BASICS of photography before you buy that lens, though. You don't need L glass if you don't know what f/4 means.
     
  3. Dryfly

    Dryfly TPF Noob!

    Joined:
    Jun 22, 2008
    Messages:
    33
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit
    and I supose you probably think I should have bought a $99 camera as well, not a 40D body.
     
  4. reg

    reg TPF Noob!

    Joined:
    May 28, 2008
    Messages:
    1,487
    Likes Received:
    1
    Location:
    Stuck inside of Mobile with the GTFO Blues Again
    Can others edit my Photos:
    Photos OK to edit
    No, I just think that if you're a total noob to photography you should really just read before making more lens purchases.

    If you have enough disposable income to get a $800 lens without even knowing the basics of photography, then more power to you. I guess I'm just more "old school" in my style of spending.

    I mean come on you didn't even know that your mount is called "EF". Now that's just sad.
     
  5. Dryfly

    Dryfly TPF Noob!

    Joined:
    Jun 22, 2008
    Messages:
    33
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit
    I was not afraid to ask. Now I wish I had not.
     
  6. reg

    reg TPF Noob!

    Joined:
    May 28, 2008
    Messages:
    1,487
    Likes Received:
    1
    Location:
    Stuck inside of Mobile with the GTFO Blues Again
    Can others edit my Photos:
    Photos OK to edit
    Either way, you got your answers.
     
  7. Dryfly

    Dryfly TPF Noob!

    Joined:
    Jun 22, 2008
    Messages:
    33
    Likes Received:
    0
    Can others edit my Photos:
    Photos OK to edit
    Cranky old bugger arnt ya!
     
  8. Hobbes

    Hobbes TPF Noob!

    Joined:
    Feb 15, 2008
    Messages:
    954
    Likes Received:
    4
    Can others edit my Photos:
    Photos OK to edit
    hehe I think he just wanted to help so no need jumping on him like that. I am quite of a noob to photography myself but I am learning and thanks to these guys I have decided to get a eos 40D as my very first DSLR
     
  9. reg

    reg TPF Noob!

    Joined:
    May 28, 2008
    Messages:
    1,487
    Likes Received:
    1
    Location:
    Stuck inside of Mobile with the GTFO Blues Again
    Can others edit my Photos:
    Photos OK to edit
    If only you knew.

    :er:
     
  10. Alex_B

    Alex_B No longer a newbie, moving up!

    Joined:
    Aug 30, 2006
    Messages:
    14,491
    Likes Received:
    206
    Location:
    Europe 67.51°N
    Can others edit my Photos:
    Photos NOT OK to edit

    I agree and disagree here at the same time.

    I know some people who know nothing about the technical terms, or how camera and lens work together. still they take stunning pictures which i would consider art. give some of them better lenses, and their images get better!

    Strange world, isn't it ;) Not everyone has to be an optical engineer to take photographs.

    However, you are right, learning about all these things helps to easier achieve the kind of image you want to create. it eliminates some trial and error and also it helps when discussing technique with other photographers and when trying to improve.

    By the way, that lens is a very good one, good value for money. however the shortest length at 17mm would not be short enough for me, and the 40 would not be long enough on a 40D. So I would love that lense in combination with your camera, but in addition I would want an ultra wide angle and a longer lens as well.
     
  11. Alex_B

    Alex_B No longer a newbie, moving up!

    Joined:
    Aug 30, 2006
    Messages:
    14,491
    Likes Received:
    206
    Location:
    Europe 67.51°N
    Can others edit my Photos:
    Photos NOT OK to edit
    I was told it stood for low dispersion .. as in having enough fluorite glass to lo reduce dispersion problems. But I might be mistaken here.
     
  12. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

    Joined:
    Jul 8, 2005
    Messages:
    37,318
    Likes Received:
    10,639
    Location:
    Victoria, BC
    Can others edit my Photos:
    Photos OK to edit

    :lol::lol::lol::lol::lol::lol:
     

Share This Page