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  1. #1
    Senior Member

    Help! New lens incompatible

    Hi,

    My new Rokinon 12mm f2.8 fisheye lens has arrived... visual inspection is ok, but after installing on D3500, set Aperture ring to f22 and turn on my camera to set aperture: all I see in the info panel shows "closed" aperture, no way to set or change f numbers, and there is the warning message: incompatible lens! I checked online everywhere, sellers, users,... no one mentioned this lens is incompatible to D3xxx or d5xxx or D7xxx... instead, it works with all Nikon DSLR F.F. or crop. More actions I took: try focusing on a relatively closed subject -- have to turn the focus ring to about infinity to get focused (confirm indicator in viewfinder); on a closed subject (computer screen) -- can't focus. And of course, shutter did not open any time in any mode... So I am very upset and confused hoping someone here would give some hint and help to clear up the puzzle before I return the lens. Thanks


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  2. #2
    Happy to be Canadian
    Super Mod
    Marcel's Avatar

    Re: Help! New lens incompatible

    Did you try it in Live View? Are you sure there are contacts at the lens' base to give lens information to the body? Have you tried it in manual mode using the lens' aperture ring to get proper exposure?
    The depth of field of this lens is huge, this is why you almost never have to focus it.
    But maybe you got a lemon and should return it.
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  3. #3
    Senior Member
    BeegRhob's Avatar

    Re: Help! New lens incompatible

    What camera and exact lens is it? It may make a difference, just saying.

    In your pic from your last topic on this lens/camera (D3500), there is a CA on the aperture ring. Did you try that? It could need the aperture lock button depressed, if it has one. Did you try, for shits and giggles, to open the aperture all the way open, or manually adjust the aperture ring? I looked on Rokinon, apparently they have no manual for it, did you get one?
    You say "closed subject", do you mean "close"? There may be a menu setting to lock the shutter if no lens is attached, it may actuate if you change this setting.

    Rob
    If you see this, this is my express permission to critique my signatures and photos!

    Primary D610 Secondary D5300 Other Nikon Bodies D5100 D5000 D3000 D90 D100 D70 D60 Parts Bodies D80 D100
    AF-S 18-55; AF-S 55-200; AF NIKKOR 70-300; AF-P 70-300 Sigma 50-500mm F4.5-6.3 APO DG OS HSM
    Non Nikon Cameras worth a crap and worth mention: Samsung Galaxy S9+ Front 8MP f1.7 Rear 12MP f1.5 & f2.4
    Paintshop Pro 2020 newb

  4. #4
    Senior Member
    Needa's Avatar

    Re: Help! New lens incompatible

    Rokinon / Samyang references indicate they are the same Rokion being the rebrand for North America. Not sure which version you have but instructions (link below) indicate lens works in A,S & P modes on F-mount.

    https://www.samyanglens.com/en/produ...ew.php?seq=190

  5. #5
    Staff
    Super Mod
    hark's Avatar

    Re: Help! New lens incompatible

    If you go back to your other thread on Q's about Rokinon 12mm thread, Sparky said the lens lacks a CPU and didn't know if it would work. And my reply to Sparky was a link to B&H which listed the compatible Nikon bodies. The D3x00 and D5x00 bodies weren't listed which made me wonder about its compatibility.
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  6. #6
    Senior Member

    Re: Help! New lens incompatible

    Double check it is set to f22. I know that with my 8mm, since there is no aperture lock on the lens, I usually have to dial it back into f22 after twisting it onto the lens mount because I inadvertently adjust the aperture ring at the same time. My 8mm Rokinon works with my D40x, (which is a pre pre pre pre pre pre d3500) as long as the aperture is dialed into f22 on the lens.
    Also, are you sure you got a lens that has the CPU contacts? DSLR's need to be able to communicate somehow with the lens either through electronic connection where both lens and camera have electrical connections or mechanical where the camera has to have an aperture feeler gage to detect where the aperture is set on the lens.
    Last edited by TwistedThrottle; 10-16-2020 at 05:20 PM.
    Thanks/Like blackstar Thanks/liked this post
     
    Camera- D800, D7500, D40x
    Zoom Lenses-
    DX- Tokina 11-16 f2.8, Sigma A 18-35 f1.8, Nikon 18-140 f3.5-5.6
    FX- Tamron 15-30 f2.8, Nikon 35-70 f2.8, Nikon 80-200 f2.8, Nikon 24-120 f4, Nikon AF-P 70-300 f4.5-5.6 Sigma C 150-600 f5-6.3
    Prime Lenses- Nikon 50 f1.8g, Tamron 85 f1.8, Tokina 100 f2.8, Rokinon HD 8 f3.5

  7. #7
    Senior Member

    Re: Help! New lens incompatible

    Help! New lens incompatible
    Thanks for so many responses.

    I tried M mode with Live View (set to f22 on lens aperture ring); can't adjust aperture on either D3500 body or lens aperture ring (info show closed aperture with no f number); but no err message of "incompatible lens"; focus and shoot -- it fires! for outside far scene, exposure ok (iso set to 800); for close up scene, it's all dark (apparently aperture closed).

    Back to P mode (with auto iso) -- Live View won't work and aperture can't be adjusted also; err: incompatible lens; focus and shoot -- no fire!

    The aperture ring has "NI" red label which indicates "Nikon" version instead of Cannon's "CA".

    B&H's Nikon camera list for this lens is specifying the lens designed for, not compatible with. (there are plenty users share their positive usage of this lens with their D3xxx)

    Finally, "Are you sure there are contacts at the lens' base to give lens information to the body?" and "are you sure you got a lens that has the CPU contacts?" Frankly, I tried (looking into the instruction Manual and the lens rear base) and still unsure. The thing I wonder is the properness of the way I install the lens to my D3500. See the pic:
    Help! New lens incompatible-2020-10-16-11.46.49.jpg






  8. #8
    Senior Member

    Re: Help! New lens incompatible

    Hi, Thanks for all your helps.

    I have talked to a tech support at Rokinon. Made some check up with the lens and my D3500 with him on the phone. And finally the tech guy assured me the lens normally should work with D3500 and suspected the lens I received could be a rare faulty. He suggested either return or exchange a new (not used as returned or re-stocked) one. I have requested AMZ for an exchange and a new (assumed) one will arrive on Sunday. Will see how it works then...

    Still your continuous comments are appreciated.
    Thanks/Like Needa Thanks/liked this post
     

  9. #9
    Senior Member
    BeegRhob's Avatar

    Re: Help! New lens incompatible

    What about your firmware? Try to find an older version, as my Sigma lens wouldn't work properly with my D610 after I updated the firmware.

    Rob
    If you see this, this is my express permission to critique my signatures and photos!

    Primary D610 Secondary D5300 Other Nikon Bodies D5100 D5000 D3000 D90 D100 D70 D60 Parts Bodies D80 D100
    AF-S 18-55; AF-S 55-200; AF NIKKOR 70-300; AF-P 70-300 Sigma 50-500mm F4.5-6.3 APO DG OS HSM
    Non Nikon Cameras worth a crap and worth mention: Samsung Galaxy S9+ Front 8MP f1.7 Rear 12MP f1.5 & f2.4
    Paintshop Pro 2020 newb

  10. #10
    Senior Member

    Re: Help! New lens incompatible

    Thanks, Rob.

    But I went to check and found there is no firmware update for my D3500 and I haven't updated since bought about a year ago.
    Thanks/Like BeegRhob Thanks/liked this post
     





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