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  1. #1
    Junior Member

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500
    HI,

    Firstly I'll apologise for the long winded post. I am interested in buying the Tamron or Sigma 100-400mm as a lighter alternative to my Tamron 150-600mm on my D850, however I'm trying to find out if all of the AF points work all of the time on the D850 (or D500). The reason that I ask is that my Tamron 150-600mm VC doesn't play nice with the D850 and D500 in that beyond around 520mm only these focus points work, ie those for a lens with the equivalent of f4 with a 1.7TC (so I guess f6.9 ish)

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-screen-shot-2018-05-25-19.14.11.jpg


    Now my assumption is that it's due to the Tamron being an f6.3 lens at the long end. However, there are two confusing things. Firstly the Tamron stops down to f6.3 long before 520mm so if it was truly aperture limited then you'd expect the limited AF points from that time, and secondly the Tamron worked fine on my D750 at all focal lengths. I did briefly have the D500 and this exhibited the same problem as the D850 so I'm assuming the issue lies with the new 153 point AF system and maybe the AF sensors aren't as sensitive, or light is restricted more? Obviously while the lens stops down to f6.3 at around 450mm (IIRC) as the lens continues to 'zoom out' there will be a little more light loss, and I guess at around 520mm this is enough loss for the 153 point system to revert to the restricted AF points. I did ask around and apparently the Sigma 150-600mm also has the same issue with the D500 and D850.

    As the 100-400mm lenses are also f6.3 I am wondering if they will exhibit a similar issue, ie at 400mm on the restricted AF points will work on the D850 (and D500). Does anyone have either of these lenses and used them on the D850 (or D500) and can confirm whether all AF points work all of the time please?

    Cheers, Toby


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  2. #2
    Senior Member
    Bikerbrent's Avatar

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    I suspect that Nikon may have purposely designed these new cameras to have some issues with 3rd party lenses (wouldn't be the first time). I would suggest you contact Sigma and Tamron directly and ask if they are aware of these issues and if they have a software fix available or in the works.
    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

  3. #3
    Senior Member
    mikew's Avatar

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500
    Sorry cant confirm as i dont have it now but i used to just use it all points for small birds against a clear sky and thought it worked Sigma100-400 D500

    Full image

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-dsc_1630.jpg
    Mike

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

    Nikon D500, Sigma 100-400, Sigma 105 macro, Nikon 18-200

    Nikon 1 V2,FT-1,10-30mm 30-110mm Viltrox extension tubes










  4. #4
    Senior Member
    mikew's Avatar

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500
    Another example of why i never questioned it, i know its not what you want but you may be able to add this to other info and get the answer.

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-dsc_2154f.jpg


    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-36196872726_c87821c96f_o.jpg
    Attached Thumbnails Attached Thumbnails Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-dsc_1630.jpg  

    Mike

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

    Nikon D500, Sigma 100-400, Sigma 105 macro, Nikon 18-200

    Nikon 1 V2,FT-1,10-30mm 30-110mm Viltrox extension tubes










  5. #5
    Junior Member

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500
    Quote Originally Posted by Bikerbrent View Post
    I suspect that Nikon may have purposely designed these new cameras to have some issues with 3rd party lenses (wouldn't be the first time). I would suggest you contact Sigma and Tamron directly and ask if they are aware of these issues and if they have a software fix available or in the works.
    I've already contacted Tamron and their response didn't fill me with the greatest of confidence. They referred me to page 95 of the D850 manual saying that only limited AF points are available with f4 lenses and beyond. If you've seen the manual you will see that that's only some very specific F4 lenses, and for Tamron to think that the D850 (or any modern camera's) AF points only work with f4 lenses and wider worries me a little bit TBH.
    Quote Originally Posted by mikew View Post
    Sorry cant confirm as i dont have it now but i used to just use it all points for small birds against a clear sky and thought it worked Sigma100-400 D500

    Full image

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-dsc_1630.jpg
    Quote Originally Posted by mikew View Post
    Another example of why i never questioned it, i know its not what you want but you may be able to add this to other info and get the answer.

    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-dsc_2154f.jpg


    Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500-36196872726_c87821c96f_o.jpg
    That's great, thanks for that I appreciate it. What AF mode did you use, single point, group, dynamic etc? I don't suppose I could trouble you further please? Do you use Lightroom and if so have the AF point plugin that shows you what AF points were used and able to post a screen shot of those please? Sorry to be a nuisance.

  6. #6
    Senior Member
    mikew's Avatar

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Quote Originally Posted by snerkler View Post
    I've already contacted Tamron and their response didn't fill me with the greatest of confidence. They referred me to page 95 of the D850 manual saying that only limited AF points are available with f4 lenses and beyond. If you've seen the manual you will see that that's only some very specific F4 lenses, and for Tamron to think that the D850 (or any modern camera's) AF points only work with f4 lenses and wider worries me a little bit TBH.



    That's great, thanks for that I appreciate it. What AF mode did you use, single point, group, dynamic etc? I don't suppose I could trouble you further please? Do you use Lightroom and if so have the AF point plugin that shows you what AF points were used and able to post a screen shot of those please? Sorry to be a nuisance.
    A sign of age i cant remember how or what i did apart from activate as many points as i could, sorry again i cant help with the focus point selection, i will put a call out for this guy he may know, he is pretty good on these things
    @BackdoorHippie
    Mike

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

    Nikon D500, Sigma 100-400, Sigma 105 macro, Nikon 18-200

    Nikon 1 V2,FT-1,10-30mm 30-110mm Viltrox extension tubes










  7. #7
    Senior Member

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Quote Originally Posted by mikew View Post
    A sign of age i cant remember how or what i did apart from activate as many points as i could, sorry again i cant help with the focus point selection, i will put a call out for this guy he may know, he is pretty good on these things
    @BackdoorHippie
    Not exactly sure what I'm being called on to answer here, but I know nothing about the D850 and the limiting focus points on certain lenses seems ridiculous, particularly on f4 lenses (unless they're talking about with a 2X TC where you're dealing with an effective f8 which may only focus in the center).

    As for mode and focus points, for birds in flight on m D500 I use AF-C with d153 more times than not since it fills the entire frame left to right.
    Jake

    The imitator is a poor kind of creature. If the man who paints only the tree, or flower, or other surface he sees before him were an artist, the king of artists would be the photographer. Ė James McNeill Whistler

  8. #8
    Senior Member
    mikew's Avatar

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Quote Originally Posted by BackdoorHippie View Post
    Not exactly sure what I'm being called on to answer here, but I know nothing about the D850 and the limiting focus points on certain lenses seems ridiculous, particularly on f4 lenses (unless they're talking about with a 2X TC where you're dealing with an effective f8 which may only focus in the center).

    As for mode and focus points, for birds in flight on m D500 I use AF-C with d153 more times than not since it fills the entire frame left to right.
    I think that may answer his question regards the D500
    Thanks/Like snerkler Thanks/liked this post
     
    Mike

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

    Nikon D500, Sigma 100-400, Sigma 105 macro, Nikon 18-200

    Nikon 1 V2,FT-1,10-30mm 30-110mm Viltrox extension tubes










  9. #9
    Junior Member

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    Quote Originally Posted by BackdoorHippie View Post
    Not exactly sure what I'm being called on to answer here, but I know nothing about the D850 and the limiting focus points on certain lenses seems ridiculous, particularly on f4 lenses (unless they're talking about with a 2X TC where you're dealing with an effective f8 which may only focus in the center).

    As for mode and focus points, for birds in flight on m D500 I use AF-C with d153 more times than not since it fills the entire frame left to right.
    Thanks for the reply. I think you may have misunderstood about the D850, it does not limit f4 lenses that was Tamron's somewhat baffling response to me. The D850 shares the same AF system as the D500 and AF points only start to limit at f4 with 1.7xTC (which is effectively around f6.9) in which 'only' 37 AF points are available/active. At f8 (f4 with 2xTC) you 'only' get 15 AF points available/active.

    The Tamron 150-600mm is f6.3 at the long end which may explain why at longer focal lengths you are limited to 45 AF points on the D850 and D500 I've owned, and the purpose of the thread was to find out whether the Tamron/Sigma 100-400mm (which are also f6.3) also exhibit the same behaviour at the longer focal lengths. The strange thing is I previously had the D750 and according to the manual the AF points start to limit at the same apertures as the D850 and D500 (ie f4 with 1.7xTC) yet with the Tamron 150-600mm all AF points work all of the time.

    It would appear the 150-600mm lenses only exhibit this behaviour with the new 153 point Nikon AF system hence why the question was raised whether it was a firmware issue and whether Tamron had released an update, but unfortunately this is when I lost a bit of faith in Tamron when they replied to me that the D850 points were limited at f4.

  10. #10
    Staff
    Super Mod
    hark's Avatar

    Re: Question regarding the Sigma and Tamron 100-400mm lenses on the D850 and D500

    @Woodyg3 do you own the Tamron 100-400mm?
    Cindy
    Flickr
    and My 2019 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci







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