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  1. #1
    Senior Member
    SteveH's Avatar

    Light reduction when using ZTF adaptor

    Hi All,
    I'm not sure it is an important question, but more out of interest really - But if the Z mount lets in around 1/3rd more light to the sensor than the F-Mount, then is there a trade-off when using F-mount lens with the adaptor, that you are reducing the amount of light hitting the sensor?
    Every single review I have read or seen say that the F-Mount lens work 100% with the Z-Mount, but none make any mention of this - I even asked in a camera shop and they couldn't decide for sure between them either!



    › See More: Light reduction when using ZTF adaptor
    Steve

    Nikon Z6
    Nikon 24-70 f4 S | Nikon 85mm f1.8s | Sigma 150-600mm f/5-6.3 DG OS HSM C | Sigma 105mm f2.8 EX DG OS HSM

    Giottos tripod | Manfrotto Monopod
    Yougnuo 568 EX Speedlights ​| Yougnuo 622 wireless Transmitter & Transceivers

    Adobe Lightroom CC | Photoshop CC | Google NIK Tools



  2. #2
    Senior Member

    Re: Light reduction when using ZTF adaptor

    The Z mount doesn't let in any more light than the F mount....
    FX: Z6, 24-70/4 Z, FTZ, 14/2.8D, 20/2.8D, 24/2.8D, 50/1.8 AF-S, 50/1.8D, 18-35AF-S, 24-85VR, 70-300VR, 300/4AFS-D, 500/8 mirror (Sears)
    DX: D7100, D5500, 3xD90, 35/1.8DX, 10-20DX, 12-24DX, 18-55VRII, 55-200VRII
    Film: FE, N80, FX lenses above plus 35mm Series E, 50mm1.4AI, 100mm Series E, 135mm2.8AI

  3. #3
    Senior Member
    SteveH's Avatar

    Re: Light reduction when using ZTF adaptor

    Well it is right on Nikon's site that more light is captured - I guess it is more down to the lens than the adapter.

    "By creating a mount with a large inner diameter and short flange focal distance, compact lenses can be designed that allow more light in, to hit the sensor." - https://www.nikonusa.com/en/learn-an...nt-system.html
    Thanks/Like Patrick Molloy Thanks/liked this post
     
    Steve

    Nikon Z6
    Nikon 24-70 f4 S | Nikon 85mm f1.8s | Sigma 150-600mm f/5-6.3 DG OS HSM C | Sigma 105mm f2.8 EX DG OS HSM

    Giottos tripod | Manfrotto Monopod
    Yougnuo 568 EX Speedlights ​| Yougnuo 622 wireless Transmitter & Transceivers

    Adobe Lightroom CC | Photoshop CC | Google NIK Tools

  4. #4
    Senior Member
    Patrick Molloy's Avatar

    Light reduction when using ZTF adaptor

    Quote Originally Posted by SteveH View Post
    Well it is right on Nikon's site that more light is captured - I guess it is more down to the lens than the adapter.

    "By creating a mount with a large inner diameter and short flange focal distance, compact lenses can be designed that allow more light in, to hit the sensor." - https://www.nikonusa.com/en/learn-an...nt-system.html
    The key wording is “...lenses can be designed ...” and it’s because there’s that short flange distance which is the z design.



    Sent from my iPad using Tapatalk
    Thanks/Like Roscoe Primrose Thanks/liked this post
     
    ---
    ​Patrick
    Nikon Z 6
    Nikkor z 24-70mm F4




  5. #5
    Senior Member
    Needa's Avatar

    Re: Light reduction when using ZTF adaptor

    Think of it this way the adapter is a spacer to project the image on the sensor at the correct size. The F-mount lens will then have the same characteristics on an F-mount or Z-mount. Any advantage will come from lens made for the Z-mount which is both closer (light loss over distance) and larger diameter (less correction required within the lens). There was an video of a Nikon engineer discussing the why the new mount, cant seem to find it.

  6. #6
    Senior Member
    Patrick Molloy's Avatar

    Re: Light reduction when using ZTF adaptor

    Quote Originally Posted by Needa View Post
    Think of it this way the adapter is a spacer to project the image on the sensor at the correct size. The F-mount lens will then have the same characteristics on an F-mount or Z-mount. Any advantage will come from lens made for the Z-mount which is both closer (light loss over distance) and larger diameter (less correction required within the lens). There was an video of a Nikon engineer discussing the why the new mount, cant seem to find it.
    Like this maybe...


    https://www.diyphotography.net/nikon...ikon-engineer/


    Sent from my iPad using Tapatalk
    Thanks/Like Needa, SteveH Thanks/liked this post
     
    ---
    ​Patrick
    Nikon Z 6
    Nikkor z 24-70mm F4




  7. #7
    Senior Member
    Needa's Avatar

    Re: Light reduction when using ZTF adaptor

    Quote Originally Posted by Patrick Molloy View Post
    Like this maybe...


    https://www.diyphotography.net/nikon...ikon-engineer/


    Sent from my iPad using Tapatalk
    That it.
    Thanks/Like Patrick Molloy, SteveH Thanks/liked this post
     





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