Results 1 to 5 of 5

Thread: Relation of focal length and field of view

  1. #1

    Default Relation of focal length and field of view

    This might be a rather silly question, but does the focal length have any relation to the field of view at all?

    For example, the new carl zeiss 18mm lens has a fov of 99 degrees diagonally, while a normal canon 18-55mm has a fov of 74 degrees (i assume diagonally too). If so, does that mean that even at the same focal length, I can see more with the carl zeiss lens attached?

    So in that respect, the focal length is actually not the most accurate judge of how wide a lens can cover, right?

  2. #2

    Default Re: Relation of focal length and field of view

    You have to take into account the format the lens is used on. The Zeiss is designed for Full-Frame sensors while the 18-55 is designed for APC sensors, but if you mount the Zeiss on a APC sensor body, the FoV would be roughly the same as the 18-55 at 18mm, though thats just about where the similarities of the 2 lens ends..

  3. #3
    Moderator catchlights's Avatar
    Join Date
    Sep 2004
    Location
    Punggol, Singapore
    Posts
    21,901

    Default Re: Relation of focal length and field of view

    yes, J-Chan is correct, you have take account on the lens is design for what format first.
    Shoot to Live, Live to Shoot
    www.benjaminloo.com | iStock portfolio

  4. #4

    Default Re: Relation of focal length and field of view

    Oh ok... so with both of them mounted on the same body (or any lenses that are of the same focal length for that matter), the angle of view should be the same? (with exception for fisheyes)

    Thanks

  5. #5

    Default Re: Relation of focal length and field of view

    Quote Originally Posted by lypklypk View Post
    Oh ok... so with both of them mounted on the same body (or any lenses that are of the same focal length for that matter), the angle of view should be the same? (with exception for fisheyes)

    Thanks
    Yup yup.
    Alpha

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •