Page 1 of 2 12 LastLast
Results 1 to 20 of 40

Thread: Infinity

  1. #1

    Default Infinity

    What is inifinity focus?

  2. #2

    Default Re: Infinity

    subjects from a certain distance to infinity is focused
    Photo Album - Photo Album

  3. #3
    Member
    Join Date
    Jul 2005
    Location
    Bt Batok
    Posts
    768

    Default Re: Infinity

    focused at very far away subjects.

    if u remember anything from secondary sch physics, tts when light rays enter parallel to eachother and becomes focused by the lens at 1f

    in reality, theres some tolerance. i'd say anything >20m will be sharp at infinity focus

  4. #4
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Infinity

    Infinity focus is to focus on subjects that can be from a certain distance to unlimited distance. Usually infinity focal distances are lens dependant and different lens give u infinity focus after a certain distance. In infinity focus, usually everything in the frame is sharp.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  5. #5
    Member
    Join Date
    Jul 2005
    Location
    Bt Batok
    Posts
    768

    Default Re: Infinity

    Quote Originally Posted by Snoweagle
    In infinity focus, usually everything in the frame is sharp.
    everything beyond a certain pt.

    everything(or mostly) sharp is at hyper-focal

  6. #6
    Member
    Join Date
    Nov 2005
    Location
    Adam Rd, Singapore
    Posts
    506

    Default Re: Infinity

    Quote Originally Posted by megascriler
    What is inifinity focus?
    Megascriller, sorry to ride on your thread...
    I used A520 before, so I'm quite familiar with the 'infinity' focus... but now using FZ 20 a bit confuse leh?? Anybody can enlighten me?

  7. #7
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Infinity

    Quote Originally Posted by roti_prata
    everything beyond a certain pt.

    everything(or mostly) sharp is at hyper-focal
    Everything in the frame will be sharp for infinity. If not, it's still not in infinity focus.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  8. #8
    Member
    Join Date
    Nov 2005
    Location
    Adam Rd, Singapore
    Posts
    506

    Default Re: Infinity

    Quote Originally Posted by Snoweagle
    Everything in the frame will be sharp for infinity. If not, it's still not in infinity focus.
    Everything? Is it the same thing if the furthest object seen sharp means everything within that range also sharp? Thanks

  9. #9
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Infinity

    Quote Originally Posted by daden
    Everything? Is it the same thing if the furthest object seen sharp means everything within that range also sharp? Thanks
    Yes...For example if you go esplanade there and take the city skyline, shift to manual mode and switch the mode on the lens to M too, then turn the focusing ring to infinity (all the way to the end). Everything will be sharp. UNLESS you have something very near u but u focus at infinity on the distant object, then obviously the object near u will be blurred.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  10. #10
    Member
    Join Date
    Nov 2005
    Location
    Adam Rd, Singapore
    Posts
    506

    Default Re: Infinity

    Quote Originally Posted by Snoweagle
    Yes...For example if you go esplanade there and take the city skyline, shift to manual mode and switch the mode on the lens to M too, then turn the focusing ring to infinity (all the way to the end). Everything will be sharp. UNLESS you have something very near u but u focus at infinity on the distant object, then obviously the object near u will be blurred.
    Hahahaha, but the problem now is my FZ20 doesn't have any end the for the focus ring... I guess it works 'by wire'... or non-mechanical focusing ring... so the best thing I can do right now is try to find focus of furthest object? Thanks for the answers bro!

  11. #11
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Infinity

    Quote Originally Posted by daden
    Hahahaha, but the problem now is my FZ20 doesn't have any end the for the focus ring... I guess it works 'by wire'... or non-mechanical focusing ring... so the best thing I can do right now is try to find focus of furthest object? Thanks for the answers bro!
    I'm not using the FZ-20 so i'm not really sure how it works. If not maybe there're some landscape mode which you may have and it will automatically set to infinity.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  12. #12

    Default Re: Infinity

    i tink u are talking about hyperfocal distance.... its the closest distance at which one should focus so that infinity is also in focus(ie everything sharp)

    its calculated by H = (F x F) / (f x D)

    where H = hyperfocal distance
    F = focal length
    f = aperture
    d = diameter of circle of least confusion.

  13. #13
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Infinity

    Yupz...it's hyperfocal distance.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  14. #14
    Member
    Join Date
    Jul 2005
    Location
    Bt Batok
    Posts
    768

    Default Re: Infinity

    Quote Originally Posted by Snoweagle
    Everything in the frame will be sharp for infinity. If not, it's still not in infinity focus.
    Quote Originally Posted by Snoweagle
    obviously the object near u will be blurred.
    and i said

    Quote Originally Posted by roti_prata
    everything beyond a certain pt.
    Last edited by roti_prata; 22nd February 2006 at 01:47 PM.

  15. #15
    Senior Member
    Join Date
    Jan 2005
    Location
    Oulu, Finland, Finland
    Posts
    6,299

    Default Re: Infinity

    Quote Originally Posted by Witness
    i tink u are talking about hyperfocal distance.... its the closest distance at which one should focus so that infinity is also in focus(ie everything sharp)

    its calculated by H = (F x F) / (f x D)

    where H = hyperfocal distance
    F = focal length
    f = aperture
    d = diameter of circle of least confusion.
    how to find d lei? is it filter size..?

  16. #16

    Default Re: Infinity

    Quote Originally Posted by Snoweagle
    In infinity focus, usually everything in the frame is sharp.
    Heh?

    Infinity focus, or focus on infinity means only that the distant objects are in focus.

    Your statement is completely off!

    I know you mean well. But be careful less you give out wrong information.

  17. #17
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Infinity

    Quote Originally Posted by student
    Heh?

    Infinity focus, or focus on infinity means only that the distant objects are in focus.

    Your statement is completely off!

    I know you mean well. But be careful less you give out wrong information.
    I was referring to when u're taking landscapes. FYI i do not give out wrong info, pls check yrself b4 giving any statements in future.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  18. #18

    Default Re: Infinity

    Quote Originally Posted by Snoweagle
    I was referring to when u're taking landscapes. FYI i do not give out wrong info, pls check yrself b4 giving any statements in future.

    Again you are giving out wrong impressions, if not wrong information.

    And especially with regards to landscapes.

    The only situation in landscapes when focussing on infinity gives everything in focus is when ALL the objects in that landscape scene happen to be also far far away.

    However many landscapes images have foreground and distant objects. Without having a very small aperture, in non view-cameras, or using lens tilt + small aperture on a view camera, you are not going to have everything in focus.

    In any case, in that post #4 nowhere did you say you were referring to landscapes. Please check what you wrote before you make more silly statements again in future.

    You may not think you are giving false information. But you are, unfortunatelly.

    He who knows not he knows not..........................

  19. #19
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Infinity

    Quote Originally Posted by student
    Again you are giving out wrong impressions, if not wrong information.

    And especially with regards to landscapes.

    The only situation in landscapes when focussing on infinity gives everything in focus is when ALL the objects in that landscape scene happen to be also far far away.

    However many landscapes images have foreground and distant objects. Without having a very small aperture, in non view-cameras, or using lens tilt + small aperture on a view camera, you are not going to have everything in focus.

    In any case, in that post #4 nowhere did you say you were referring to landscapes. Please check what you wrote before you make more silly statements again in future.

    You may not think you are giving false information. But you are, unfortunatelly.

    He who knows not he knows not..........................
    Read my post no. 9. Think u're just trying to be smart that's all. I've been a landscape shooter for years so dun tell me what's right or not.
    Last edited by Snoweagle; 22nd February 2006 at 04:32 PM.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  20. #20
    Moderator catchlights's Avatar
    Join Date
    Sep 2004
    Location
    Punggol, Singapore
    Posts
    21,902

    Default Re: Infinity

    OMG!!!

    student vs student

Page 1 of 2 12 LastLast

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
  •