Lens Doesn't Open to 3.5 - Nikkor 18-140mm

Discussion in 'Nikon Lenses' started by KeizerSoze313, May 1, 2016.

  1. KeizerSoze313

    KeizerSoze313 TPF Noob!

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    i have a Nikon D5100 and a 18-140mm 3.5-5.6g

    in manual mode, aperture priority, doesn't matter, I can't open to f3.5.

    the camera shows (view finder/lcd display) 5.6 as the lowest

    what am i doing wrong?! can someone help, plz?

    thanks!!


     
  2. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

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    Zoom out to 18mm and it will. That's why it's listed as an 3.5-5.6.... the maximum aperture available depends on the focal length it's set at.
     
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  3. Watchful

    Watchful No longer a newbie, moving up!

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    At 140mm the lowest aperture setting is 5.6, at 18mm it is 3.5
     
  4. KmH

    KmH In memoriam Supporting Member

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    And the maximum aperture you can use varies in between the 2 extremes.
    Which is why any zoom lens having a range of maximum apertures is called 'variable aperture' zoom lens.
    If you set f/3.5 @ 18 mm and then zoom the lens the maximum aperture will automatically stop down (get physically smaller) until it reaches f/5.6 shortly before the zoom reaches 140 mm.

    FWIW - f/3.5 is a bigger number (because it's a fraction), and a more open (wider) lens aperture than f/5.6 is.
     
  5. KeizerSoze313

    KeizerSoze313 TPF Noob!

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    thank you, 480Spanky, Watchful, & KmH!!! I appreciate it :)

    check me out on IG if ya like:

    instagram.com/FortyEight209
     

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