sigma 105mm f/2.8 Macro Help

Discussion in 'Photography Equipment & Products' started by Sachphotography, Sep 20, 2010.

  1. Sachphotography

    Sachphotography TPF Noob!

    Joined:
    Jun 17, 2009
    Messages:
    1,229
    Likes Received:
    1
    Location:
    Tulsa, OK
    Can others edit my Photos:
    Photos NOT OK to edit
    ok so I had a chance to play with this lens.... I have one on the way now... I noticed something and need some help....Can this lens not focusing on anything past like 15 feet? It seems that Focusing to infinity is only like 15-20feet...... Anybody else notice this or is this like that because it is designed for macro work.

    My ignorance may be showing but oh well..
     
  2. Derrel

    Derrel Mr. Rain Cloud

    Joined:
    Jul 23, 2009
    Messages:
    35,456
    Likes Received:
    12,796
    Location:
    USA
    Can others edit my Photos:
    Photos OK to edit
    Well, this topic comes up periodically....as in this post from yesterday...

    http://www.thephotoforum.com/forum/...s-news-reviews/218086-yes-no-you-tell-me.html

    an excerpt of what I wrote: "Macro lenses are bad action lenses...they do not focus well beyond about 1.5 to 2 meters...the focus travel among all brands (except for the new Zeiss ZE and ZF models I've seen) is hair-trigger at normal "action" distances, which leads to lots of focusing misses and near-misses, which is the exact wrong thing for a lens used on sports, where "opportunities" are like fleeting, ephemeral chances, and the lens's focusing speed is the most-critical factor in being able to get a good shot, or ending up with an OOF,missed shot.

    So....well...uh-huh...yeah....bummer man...
    Yes, macro lenses OFTEN have very hair-trigger focusing throw beyond 1.5 to 2 meters...they often have micoscopic throws that go from 2 meters to 60 meters within three or four millimeters of focusing ring travel, and that means that at normal "field" or "portrait" distances, a macro lens can have difficulty focusing accurately and repeatably under what would be considered normal time constraints and normal percentages...and this holds true for the Tamron 90, Canon 100, Nikkor 60, Sigma 180, and a host of other excellent macro lenses...focusing with a macro lens at "normal" distances is a hit or miss affair...even with a good camera with a powerful AF module, getting a secure, accurate focusing lock-on with a macro lens can be a real PITA,many times, when something like a 50mm 1.8 lens will just go "Dzt!" and focus in 3/10 second, reliably, shot after shot...
     
  3. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

    Joined:
    May 1, 2008
    Messages:
    23,099
    Likes Received:
    3,765
    Location:
    UK - England
    Can others edit my Photos:
    Photos OK to edit
    I agree with Derral, macro lenses can be a bit tricky at longer ranges - that said the 100mm macros are often used as portrait lenses and I've seen some great work done with a 150mm macro and captive big cats. So yes they can and do work very well; they are just harder to focus.

    That said your lens should be able to focus all the way to infinity - check that you've not got a focus limiter switch enabled which would restrict the focus to a select band of ranges. If you've not got the limiter switch on and the lens still cannot focus all the way to infinity it sounds like there might bea problem with the lens itself
     
  4. JustAnEngineer

    JustAnEngineer TPF Noob!

    Joined:
    Apr 11, 2008
    Messages:
    609
    Likes Received:
    1
    Location:
    Heart of Dixie
    Can others edit my Photos:
    Photos OK to edit
    My EF 100mm f/2.8 Macro USM does a decent job at longer than macro distances, but with a Sigma lens on a Nikon body, you're likely to get a different experience.
     
  5. Sachphotography

    Sachphotography TPF Noob!

    Joined:
    Jun 17, 2009
    Messages:
    1,229
    Likes Received:
    1
    Location:
    Tulsa, OK
    Can others edit my Photos:
    Photos NOT OK to edit


    Could be true.. We will see when mine gets here..
     

Share This Page