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  1. #1
    Senior Member

    DX & FX lenses

    I know newbie question. What is the differance between the two and how can you tell them apart?


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  2. #2
    Senior Member
    480sparky's Avatar

    Re: DX & FX lenses

    DX lenses are marked right on them as such.

    The physical difference is the size of the image circle projected onto the sensor. DX lenses need only to project a circle large enough for a DX sensor. FX lenses project larger circles for covering the larger FX sensors.
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  3. #3
    Senior Member
    Dangerspouse's Avatar

    Re: DX & FX lenses

    Hi arshuter -

    Basically, DX and FX cameras have different sensor sizes so they need lenses which will spread light across the correct area of each. You can mount FX lenses on a DX body and vice-versa, but there will be considerations that must be taken into account (most FX cameras automatically sense if you mounted a DX on it and adjust, but DX cameras don't do that if you stick an FX on, I believe). Your D7100 has a DX sensor (the smaller of the two sensors).

    You can tell which lens is which by looking at the lens itself. Either "DX" or "FX" will be printed on the model nomenclature.

    Check out these from the Nikon site itself. They're quick, and should answer any questions you have:

    https://www.nikonusa.com/en/learn-an...x-formats.html

    https://www.nikonusa.com/en/learn-an...or-lenses.html

    Hope this helps!

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  4. #4
    Senior Member
    Bikerbrent's Avatar

    Re: DX & FX lenses

    And now we can add Z lenses into the fray!
    Brent: Poway, CA
    D7200, D200, F100
    Tokina 12-24mm
    Nikon 18-200mm
    Tokina 28-70mm f2.6-2.8
    Nikon 80-200mm f2.8
    Sigma 150-600mm
    Nikon 50 AF f1.8
    Tokina 100mm f2.8 Macro
    Nikon SB800

  5. #5
    Senior Member

    Re: DX & FX lenses

    Awesome answers folks, thank you
    Thanks/Like Dangerspouse Thanks/liked this post
     

  6. #6
    Senior Member
    carguy's Avatar

    Re: DX & FX lenses

    Quote Originally Posted by arshuter View Post
    I know newbie question. What is the differance between the two and how can you tell them apart?
    This should help

    https://www.nikonusa.com/en/learn-an...x-formats.html
    Joe

    D750 | 50mm f1.8G | Tamron 70-200 2.8 VC
    Fujifilm X100T | Nikon F3/T, N2000, N8008, N90s | Minolta XG1 & X-570
    Detroit Imagery / My weekly contributions /
    About.me
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  7. #7
    Senior Member
    JoeIskor's Avatar

    Re: DX & FX lenses

    I observed that there is a difference in quality

  8. #8
    Senior Member
    carguy's Avatar

    Re: DX & FX lenses

    Quote Originally Posted by JoeIskor View Post
    I observed that there is a difference in quality
    Please elaborate.
    Joe

    D750 | 50mm f1.8G | Tamron 70-200 2.8 VC
    Fujifilm X100T | Nikon F3/T, N2000, N8008, N90s | Minolta XG1 & X-570
    Detroit Imagery / My weekly contributions /
    About.me
    Notary Public & Loan Signing Agent






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