The Tokina ATX-Pro 28-70mm Confusion

Thanks everyone for all your info.. So wee update. I got myself a good example of the Version 2 lens finally for a decent price, however once I got it on my camera body (D5100) I am getting a messge to set the aperture ring to the smallest setting which will be F/22.. One problem.. the aperture ring wont slide all the way to F/22. It sits between F/16 and F/22. When I take the lens off the A-ring slides all the way home to F22 and during the coupling process the ring is knocked back between the two apertures. Can anyone advice me as to whats happening here and how to mitigate this?

Update: I have managed to get the lens up and running. I traced it back to a little protruding plastic thing that was pushing the small metal aperture tab back once i clicked the lens home. Luckly the plastic thing pushes back into the body like a switch. I held it down and the lens clicked home with the aperture tab on the lens sitting ontop of it and the error messege has now gone and the lens is operational. Sorry for the lack of technical knowlege describing the bits and bobs on the lens and camera

Originally Posted by Bikerbrent

Are you referring to a black tab to the right of the F-stop rings? If so, this is a locking device for the F-stop. When the lab is pushed upward (towards front of lens), the F-stop ring will move freely. However, if you set the F-stop ring to F22 (green mark), then slide the tab downward (exposing a green mark) then the F-stop will be locked at F22 for autofocus. Returning this tab to the upward position unlocks the F-stop ring. This tab may have been forced downward when the F-stop ring was not at F22, causing the issue you noted. At least this is the way in works on my Gen 2 lens. Congratulations, this is one great lens.

If you can imagine on the camera body at 8 'clock https://i.pinimg.com/originals/b0/fc...0f0b998eb5.jpg <<< As seen on this pic The aperture tab on the lens comes in contact with this little button and it knocked the aperture back a notch (the locking switch seems to not fully engage. Must be broken unfortunatley) to just past F/16. So with a pencil (yes high-tech gadgetry!) I pressed the little button down as I clicked the lens in place and the result was the camera was good to go

First impressions of the lens are that its way heavier than anything I have had attached before. Not too heavy mind you but I cant help think how heavy it will feel attached to a D700! I took some shots of my Netgear Nas for selling earlier and I was very happy with the results. Next step is getting out in the field and giving it a good go.

As I mentioned I took a few shots with it and once I had loaded the first image into Camera Raw I realised Photoshop didnt have a lens correction profile for my Tokina. Do you have any advice about this issue? To be honest I had'nt given much thought to this prior to buying the lens

Originally Posted by Bikerbrent

I should have read your posting a little more carefully. The D5100 does NOT have a autofocus motor in the camera body. Therefore, this lens will NOT autofocus on this camera body. It will work in manual focus mode only. The little button you are referring to is where the AF drive is located on my D7200. I do not know what the function of this button is on the D5100. However, the lens will autofocus on a D700 since this camera does have an builtin autofocus motor. You might want to take a look at https://www.nikonians.org/reviews/ni...-compatibility

Manual mode is fine for me, I was aware of this anyway. I do plan to upgrade to fullframe really soon. The D700 is what I have my eye on actually. Just got to find the right one and sell my D5100. Just going to check out this link you have supplied