Comparing lenses?

Discussion in 'Digital Discussion & Q&A' started by Fred Kim, May 14, 2008.

  1. Fred Kim

    Fred Kim TPF Noob!

    Joined:
    Apr 13, 2008
    Messages:
    14
    Likes Received:
    0
    Well I'm here to ask things about general knowledge of lense.

    But to be specific, I want to know how the NIKKOR 18-55mm f/3.5-5.6G ED II lens and the AF NIKKOR 50mm f/1.8D compare.

    Be as general as possible or specific, I dont care, I just want to know some differences about these lens.

    I want to know the difference of the outcome of each photo through each lens.

    Thanks
     
  2. Fred Kim

    Fred Kim TPF Noob!

    Joined:
    Apr 13, 2008
    Messages:
    14
    Likes Received:
    0
    Oh, and right now I have a 18-135mm nikkor lens, and I was wondering if the lens listed above have a greater depth of field.

    Can someone explain how focal length relates to depth of field when it comes to lenses?
     
  3. Rachelsne

    Rachelsne TPF Noob!

    Joined:
    Jan 24, 2008
    Messages:
    1,138
    Likes Received:
    0
    Location:
    Yorktown, VA, USA
    Can others edit my Photos:
    Photos OK to edit
    I cant realy help, but I do like watching the videos on you tube about how people use camera,s here are some about depth of field.
     
  4. Garbz

    Garbz No longer a newbie, moving up!

    Joined:
    Oct 26, 2003
    Messages:
    9,713
    Likes Received:
    203
    Location:
    Brisbane, Australia
    Can others edit my Photos:
    Photos NOT OK to edit
  5. Fred Kim

    Fred Kim TPF Noob!

    Joined:
    Apr 13, 2008
    Messages:
    14
    Likes Received:
    0
    My question was how focal length of lens relates with depth of field, not how aperture relates with depth of field.
     
  6. JimmyO

    JimmyO TPF Noob!

    Joined:
    Feb 3, 2008
    Messages:
    2,132
    Likes Received:
    0
    Location:
    NJ
    Can others edit my Photos:
    Photos NOT OK to edit
    Well the closer your subject is the narrower the depth of field. So your DOF at 3 feet will be much narrower than at 20 feet.
     
  7. Garbz

    Garbz No longer a newbie, moving up!

    Joined:
    Oct 26, 2003
    Messages:
    9,713
    Likes Received:
    203
    Location:
    Brisbane, Australia
    Can others edit my Photos:
    Photos NOT OK to edit
    I know what you asked, and what I posted. I suggest you re-read that thread, and take note that the example pictures I shot at the bottom were all with the aperture fixed at f/2.8. Only the focal length changed from 28mm-200mm.

    Don't just give up reading the thread title or you'll never get anywhere on this forum. :wink:
     
  8. Fred Kim

    Fred Kim TPF Noob!

    Joined:
    Apr 13, 2008
    Messages:
    14
    Likes Received:
    0
    Yea I've previously read that thread twice.
    Sorry for thinking that it wouldn't help.

    So basically, the smaller the focal length, the greater the depth of view?

    And would it be a good move to buy a nikkor 50mm f/1.8d if i have a nikkor 18-135mm?
    What will be the advantages between the two?
     
  9. henkelphoto

    henkelphoto TPF Noob!

    Joined:
    Mar 10, 2008
    Messages:
    105
    Likes Received:
    2
    Location:
    Las Vegas
    Can others edit my Photos:
    Photos NOT OK to edit
    I think the problem here is you are comparing apples to oranges. One lens is a zoom lens, the other is a prime focus. The only time they would be comparable is when the zoom lens is set on 50mm.

    Offhand, I'd say that the prime is probably better glass and will give you a sharper image at the same aperture than the zoom lens. The prime lens will also be usable in lower light conditions than the zoom. On the other hand, the zoom lens will give you much more versatility than the prime lens, assuming you are not trying to photograph in low light.
     
  10. Garbz

    Garbz No longer a newbie, moving up!

    Joined:
    Oct 26, 2003
    Messages:
    9,713
    Likes Received:
    203
    Location:
    Brisbane, Australia
    Can others edit my Photos:
    Photos NOT OK to edit
    Yes. Because the out of focus subjects are rendered larger / smaller for long and short focal lengths respectively the apparent depth of field changes too.
     

Share This Page