New Nikon Lens...Defective or Normal Operation??

Discussion in 'Photography Equipment & Products' started by RawHope, Dec 8, 2009.

  1. RawHope

    RawHope TPF Noob!

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    Just unboxed my new Nikon 105mm F2.8 Macro lens. My husband noticed in Aperature Priority, lens would not go down to 2.8 in all situations...in my D70 or on his D90. In different lighting, it would go down to 2.8. Sometimes in other lighting though, it would only go down to a maximum of f3.2. Wondering is this normal or is this something wrong with this lens I just purchased?? Hoping nothing is wrong.

    Thanks,
    Carolyn
     
  2. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    As part of how macro lenses (at least most modern ones it seems) achive close focus they effectivly stop down as you focus closer on a subject. So at macro distances your wide open aperture might very well effectivly be smaller than f2.8.
    Canon cameras don't report this change in effective aperture, but it appears Nikon cameras do report the effective aperture.
     
  3. kundalini

    kundalini Been spending a lot of time on here!

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    This is normal when you're getting down in the macro settings. Did you try fosucing on something at a "normal" shooting distance? I don't have mine handy, but look at the charts in the last few pages of your owners manual.
     
  4. itznfb

    itznfb TPF Noob!

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    It's normal.

    As kundalini said though your manual will go into more detail if you wish to know.
     
  5. DScience

    DScience No longer a newbie, moving up!

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    What? So you can't use your macro lens at 2.8??? What's the freaking point?
     
  6. itznfb

    itznfb TPF Noob!

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    I don't think you understand how ridiculously shallow the dof gets at min focus distance. f/2.8 is pretty useless in a lot of situations.
     
  7. kundalini

    kundalini Been spending a lot of time on here!

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    The ability to get a 1:1 ratio. You're normally going to be shooting from f/8 to f/18 anyway when doing macro.
     
  8. KmH

    KmH Helping photographers learn to fish Supporting Member

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    Ah, the old read the users manual trick. Pity more people don't do so.
     
  9. kundalini

    kundalini Been spending a lot of time on here!

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    :lol: :lol:

    Being they only have 3 posts so far, I didn't want to run them off with RTFM. :lmao:
     
  10. Wolverinepwnes

    Wolverinepwnes TPF Noob!

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    totally normal!
     
  11. DScience

    DScience No longer a newbie, moving up!

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    LOL no i meant what's the point of making an expensive f2.8 lens when you can make it an affordable f3.5 lens?
     
  12. RawHope

    RawHope TPF Noob!

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    Thank you for all the replies. I'm so relieved there's nothing wrong with my lens! Guess I better read the manual. I will but I can't seem to put my camera down right now! :biggrin:
     

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