Focusing to infinity?

Discussion in 'Photography Beginners' Forum' started by crimbfighter, Jul 6, 2010.

  1. crimbfighter

    crimbfighter No longer a newbie, moving up!

    Joined:
    Jun 4, 2010
    Messages:
    1,162
    Likes Received:
    433
    Location:
    Wisconsin, United States
    Can others edit my Photos:
    Photos OK to edit
    I've been reading that one way to get night landscapes, fireworks or what have you, that are more than roughly 100 feet away, you can simply focus your lens too infinity and it should be in focus. I've tried this, and have failed miserably...

    Two problems I see. One, with my cheaper lenses, I don't have that nifty little window telling me where my focus is. So, is there a rule of thumb for knowing when I'm at infinity? Such as, "if you're standing behind the camera, always turn the focusing ring...."

    Two, am I way off on my reading comprehension and should I use some other trick for focusing at night?
     
  2. Josh66

    Josh66 Been spending a lot of time on here!

    Joined:
    Oct 31, 2007
    Messages:
    14,604
    Likes Received:
    1,236
    Location:
    Cedar Hill, Texas
    Can others edit my Photos:
    Photos NOT OK to edit
    If you don't have a distance window on the lens you can pretty much only guess.

    This will get you pretty close:
    Turn the focus ring all the way until it stops (can't think of which direction right now, but that should be pretty obvious once the lens is on the camera), then back it off a little bit.

    Most lenses will go a little past infinity, so just short of the end should be good.
     
  3. Polyphony

    Polyphony TPF Noob!

    Joined:
    Jun 25, 2010
    Messages:
    336
    Likes Received:
    0
    Location:
    New York
    Can others edit my Photos:
    Photos OK to edit
    Can you explain what you mean by this?
     
  4. Juice

    Juice TPF Noob!

    Joined:
    Jul 1, 2010
    Messages:
    419
    Likes Received:
    51
    Location:
    Varies
    Can others edit my Photos:
    Photos OK to edit
    Too infinity, and beyond!
     
  5. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

    Joined:
    Sep 9, 2006
    Messages:
    11,437
    Likes Received:
    2,095
    Location:
    Wichita, Kansas, USA
    Can others edit my Photos:
    Photos OK to edit
    "Space, the final frontier. These are the voyages of the starship Enterprise. Its five-year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before." :lmao: :lmao: :lmao:


    (TV show from the 60's) "Star Trek" (1966) (Yes Garbz, it was several movies, but it started out as a TV show here in America in the 60) :mrgreen: :mrgreen: :lmao: :lmao:





    Sorry Garbz, I just had too. :D
     
  6. Josh66

    Josh66 Been spending a lot of time on here!

    Joined:
    Oct 31, 2007
    Messages:
    14,604
    Likes Received:
    1,236
    Location:
    Cedar Hill, Texas
    Can others edit my Photos:
    Photos NOT OK to edit
    It means exactly what it sounds like it means.

    On lenses with distance scales, there is a mark for infinity. On Canon lenses it looks like an "L". I'm pretty sure it's an actual infinity symbol on Nikon lenses (∞).

    If you turn the focus ring to that mark, you are focused at infinity. You can usually go a little bit past that mark though.
     
  7. MGriff240

    MGriff240 TPF Noob!

    Joined:
    Feb 10, 2010
    Messages:
    185
    Likes Received:
    0
    Location:
    Horsham, PA
    Can others edit my Photos:
    Photos OK to edit
    Yeah, usually the end on the spin on the focus ring is a tiny bit past infinity. Turn it all the way, then back a hair.
     
  8. DerekSalem

    DerekSalem TPF Noob!

    Joined:
    Aug 8, 2009
    Messages:
    660
    Likes Received:
    10
    Location:
    Cleveland, OH
    Can others edit my Photos:
    Photos OK to edit
    I think he means how can you focus past infinity. I've always wondered this too, actually lol

    Infinity should have no limit...so what does it mean when you focus *past* infinity? How can you even do that?
     
  9. MGriff240

    MGriff240 TPF Noob!

    Joined:
    Feb 10, 2010
    Messages:
    185
    Likes Received:
    0
    Location:
    Horsham, PA
    Can others edit my Photos:
    Photos OK to edit
    It basically is completely OOF. If infinity was the end of the turn on the ring, there would be no play at the end and it could mess with the actual focus.
     
  10. Polyphony

    Polyphony TPF Noob!

    Joined:
    Jun 25, 2010
    Messages:
    336
    Likes Received:
    0
    Location:
    New York
    Can others edit my Photos:
    Photos OK to edit
    I think this is wrong. It is fundamentally impossible to go PAST infinity in anything. There might be some play in the ring but you can not focus PAST infinity.
     
  11. MGriff240

    MGriff240 TPF Noob!

    Joined:
    Feb 10, 2010
    Messages:
    185
    Likes Received:
    0
    Location:
    Horsham, PA
    Can others edit my Photos:
    Photos OK to edit
    Well I know that in both my 18-55 and 50 prime, going past infinity on the focus throws the image completely OOF. I think my Sigma 2.8 does it too. *shrugs* Just what I know from experience.
     
  12. Polyphony

    Polyphony TPF Noob!

    Joined:
    Jun 25, 2010
    Messages:
    336
    Likes Received:
    0
    Location:
    New York
    Can others edit my Photos:
    Photos OK to edit
    I am not doubting that occurrence. (It could be due to a number of things) I am simply questioning the ability to do anything past infinity.

    Also, the camera may be marked "infinity" but there actually is a distance that the lens is focusing on.
     
    Last edited: Jul 6, 2010

Share This Page

Search tags for this page
always focus at infinity
,
canon 18- 200mm lens infinity focus
,
focus to infinity nikon 18-55
,
how to focus to infinity nikon 18-55
,
how to focus to infinity with nikkor 35mm 1.8 night
,
nikon 35mm 1.8 focus to infinity
,

nikon 35mm 1.8 infinity focus

,

nikon d5000 infinity focus

,
what does the infinity mean on nikkor lense
,
what's infinity on nikon lens