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  1. #1
    Junior Member

    Tamron full frame lense on Nikon AP-C ?

    Found a good deal on a Tamron SP 70-200mm f/2.8 DI VC USD however I noticed that it's meant for full frame cameras. My Nikon D5600 is APS-C. Would I be better off getting a lens specifically for APS-C ? I know there's a crop factor involved if I use a full frame lense.


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  2. #2
    Senior Member
    FredKingston's Avatar

    Re: Tamron full frame lense on Nikon AP-C ?

    A full-frame lens on a crop camera is not a problem... A crop lens on a full-frame camera is.

    The 70-200 will be the equivalent to a 105-300 on your D5600
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  3. #3
    Senior Member

    Re: Tamron full frame lense on Nikon AP-C ?

    Its not just the focal length you must multiply by the crop factor (1.5x for Nikon), its also the aperture. If you are getting it for low light, this means your 70-200 is equal to 105-300 f4.2 Keep in mind that all DX lenses must also be multiplied by this too so there are only a handful of zooms and primes that would be as good as the 70-200 f2.8 for low light. The only APS-C zoom that is comparable is the sigma 50-100 f1.8, but its over a grand and one can rarely find a deal on that lens Its equal to 75-150 f2.7 on a full frame but isn't meant to be used on a full frame,(it can but with a lot of vignette). Bottom line, get the Tammy if its a good deal unless your shooting in low light and need the extra stop.
    Last edited by TwistedThrottle; 10-02-2019 at 04:32 PM.

  4. #4
    Staff
    Super Mod
    hark's Avatar

    Re: Tamron full frame lense on Nikon AP-C ?

    Quote Originally Posted by TwistedThrottle View Post
    Its not just the focal length you must multiply by the crop factor (1.5x for Nikon), its also the aperture. If you are getting it for low light, this means your 70-200 is equal to 105-300 f4.2 Keep in mind that all DX lenses must also be multiplied by this too so there are only a handful of zooms and primes that would be as good as the 70-200 f2.8 for low light. The only APS-C zoom that is comparable is the sigma 50-100 f1.8, but its over a grand and one can rarely find a deal on that lens Its equal to 75-150 f2.7 on a full frame but isn't meant to be used on a full frame,(it can but with a lot of vignette). Bottom line, get the Tammy if its a good deal unless your shooting in low light and need the extra stop.
    Twisted Throttle, I'm wondering if you are mixing this lens up with a teleconverter. A teleconverter will affect the aperture, but putting an FX lens on a DX body won't affect the aperture. This lens will offer the field of view of 105-300mm as Fred mentioned and will still offer f/2.8 as the largest aperture.
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    Cindy
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  5. #5
    Junior Member

    Re: Tamron full frame lense on Nikon AP-C ?

    Yes I'm looking for low light fast action (football, soccer games). I know those are tough situations to shoot in.Looking for a high aperture to try and get more light. With the shutter speeds I need (around 1/1000) I am limited with my current lens and i have to bump up the ISO which then of course introduces noise. The only thing I could think of that would help (high school stadium guys, get better lighting!!) would be a lens that allows a higher aperture.

  6. #6
    Junior Member

    Re: Tamron full frame lense on Nikon AP-C ?

    Oh and the lens I found on craigslist is Excellent condition Tamron (A009) 70-200mm f2.8 lens.
    They are asking $325 OBO

  7. #7
    Junior Member

    Re: Tamron full frame lense on Nikon AP-C ?

    Yeah if the aperture is higher than f/2.8 it defeats the purpose I need it for. So is it confirmed that aperture would remain the same or no?

    Thanks

  8. #8
    Senior Member
    mikew's Avatar

    Re: Tamron full frame lense on Nikon AP-C ?

    You would need to check compatabilty some early lenses are not compatible with later Nikons.
    Mike

    https://www.flickr.com/photos/7239177@N07/

    Olympus EM1MK11,Panasonic G80, 12-60mm, 60mm macro, Leica 100-400mm

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  9. #9
    Senior Member
    Danno's Avatar

    Re: Tamron full frame lense on Nikon AP-C ?

    Tamron full frame lense on Nikon AP-C ?
    Quote Originally Posted by TwistedThrottle View Post
    Its not just the focal length you must multiply by the crop factor (1.5x for Nikon), its also the aperture. If you are getting it for low light, this means your 70-200 is equal to 105-300 f4.2 Keep in mind that all DX lenses must also be multiplied by this too so there are only a handful of zooms and primes that would be as good as the 70-200 f2.8 for low light. The only APS-C zoom that is comparable is the sigma 50-100 f1.8, but its over a grand and one can rarely find a deal on that lens Its equal to 75-150 f2.7 on a full frame but isn't meant to be used on a full frame,(it can but with a lot of vignette). Bottom line, get the Tammy if its a good deal unless your shooting in low light and need the extra stop.
    I have seen this explained in a video by Tony Northrop, but it is not accurate. His results are anecdotal at best. Aperture is a physical characteristic of the lens. When I saw this video I became very puzzled because it made no sense to me. So I simply sought out the math.

    Crop factor affects the field of view of a lens because the sensor is smaller, but it does not affect the aperture because it does not impact the field of view or depend on the size of the sensor. It is like the pupil of an eye it opens or closes to simply control light. The f-stop is a mechanical characteristic of the lens. The f-stop is the actual the focal length divided by the f-stop value. It gives you the Diameter of the opening. To get the area of the opening you just do the simple divide the diameter by 2 for the radius and plug the value in the formula for area, .

    Dan~~Kentucky

    "The natural man must know in order to believe; The spiritual man must believe in order to know. " ~ Aiden Wilson Tozer ~ "The Dwelling Place of God"

    Nikon Z 6 Nikon D7200 w/Grip, Nikon D700 w/Grip, AF-S Nikkor 200-500mm f/5.6E ED VR, Nikon 14-24 f/2.8, Nikkor 50mm/1.8G, Tamron 28-75, Tamron 70-200 F/2.8
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  10. #10
    Senior Member
    Bikerbrent's Avatar

    Re: Tamron full frame lense on Nikon AP-C ?

    Using an FX lens on a DX body does NOT change the F stop. See this link:

    https://www.dpreview.com/forums/thread/3282085

    It does change the depth of field, but not a real issue for sports photography (in fact it might actually be beneficial). The only concern is if the lens has a builtin focus motor since a D5600 does NOT have a builtin focus motor.
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    Brent: Poway, CA
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