tokina at-x pro 28-80mm af issue

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My dad bought me a tokina at-x pro 28-80mm for my birthday a couple of months ago well just over a month nearly 2 now (from ebay and its 2nd hand)

and its been working fine etc but all of a sudden its stopped auto focusing on my d7000. Now I did hand it over to one of my friends when it stopped af'ing now I was watching them from a distance they didn't drop it thats for sure but they did change some of the settings now I reset my d7000 and it still wouldn't focus. I tried my 35mm (which I have had issues in the past) but the 35mm works fine so Im assuming maybe the auto config on the lens has a certain setting i cant remember what its called but i seem to remember that the d7000 can have up to 9 different settings for it....

does it sound like the lens or the camera ?
 
Does the lens have a built on AF motor? If it does, try cleaning the contacts.
 
Apologies if stating the bleeding obvious, but the focusing ring hasn't been pulled back into the manual focus position has it?
 
gad-westy said:
Does the lens have a built on AF motor? If it does, try cleaning the contacts.
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Sorry to sound silly here What would I use to clean the contacts 100% vol Alcohol ?

f1charlie said:
Apologies if stating the bleeding obvious, but the focusing ring hasn't been pulled back into the manual focus position has it?
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No sadly not If I move the focus ring up (from manual) it appears for a sheer millisecond then af goes off if I turn the cam on with AF engaged then ...nothing ?
 
I had one of the many generations of this lens. It definitely doesn't have an inbuilt focus motor. It relies on receiving a screw drive from the camera body.

It sounds to me that your body is ok if it will drive the 35mm. You didn't say which version of 35mm lens you've got. If its the older f2 then that is also a screw drive lens so you've proved that your camera motor is ok.

If your 35mm is the newer f1.8 then it is an afs lens which doesn't use the camera body motor. In this case you need to test your camera using a different screw drive lens (if possible).

Another good test would be to test the lens on a different camera body (again, if possible).

I'm not familiar with the d7000 so I can't offer any advice with settings.

Good luck!
 
White Rose said:
I had one of the many generations of this lens. It definitely doesn't have an inbuilt focus motor. It relies on receiving a screw drive from the camera body.

It sounds to me that your body is ok if it will drive the 35mm. You didn't say which version of 35mm lens you've got. If its the older f2 then that is also a screw drive lens so you've proved that your camera motor is ok.

If your 35mm is the newer f1.8 then it is an afs lens which doesn't use the camera body motor. In this case you need to test your camera using a different screw drive lens (if possible).

Another good test would be to test the lens on a different camera body (again, if possible).

I'm not familiar with the d7000 so I can't offer any advice with settings.

Good luck!
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You are correct in that my 35mm is a afs lens which I totally forgot that it has an inbuilt motor *sigh*silly me anyways I have 2 way OLD lenses nearly as old as me. From my F801 and I can fairly say they are none afs lenses and they work on my D7000 where as the tokina does not :( I also tested the tokina on my F801 again it dosent focus not that I would know if It did previously as I dunno if they are backwards compatable :S? but regardless all things seem to point to a fail in the tokina department

any ideas on how much would it cost to repair this or should I just get a new lens as it was £280 ? Im thinking the repair bill would come somewhere near :S?

and cheers for the suggestion
 
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I've never had a lens repaired so I wouldn't have any idea about the sort of cost involved. It's quite an old lens which is no longer a current model so that might make sourcing spares harder or more costly.

From the info you've given it does sound like a lens problem. Some more ideas to try:

Take the lens off the camera and set the clutch to the manual focus position. Rotate the focus ring and check that it moves freely. Check the screw drive fitting on the lens base and ensure that it rotates as you adjust focus.

When you have the lens mounted on the camera, can you hear the camera body af motor trying to drive the lens?

After mounting the lens does the top lcd on the camera show a valid f stop? If it does, and if you can change it then that indicates a good connection between camera and lens.

Check that the aperture ring on the lens is set to its smallest aperture (prob f22).

The lens prob has a mf/af switch on the left hand side in addition to the push pull clutch. Check this too.

That's about all of the ideas I can think of. Apologies if some of these are a little obvious. I'm just trying to be thorough.

Cheers
 
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White Rose said:
I've never had a lens repaired so I wouldn't have any idea about the sort of cost involved. It's quite an old lens which is on longer a current model so that might make sourcing spares harder or more costly.

From the info you've given it does sound like a lens problem. Some more ideas to try:

Take the lens off the camera and set the clutch to the manual focus position. Rotate the focus ring and check that it moves freely. Check the screw drive fitting on the lens base and ensure that it rotates as you adjust focus.

When you have the lens mounted on the camera, can you hear the camera body af motor trying to drive the lens?

After mounting the lens does the top lcd on the camera show a valid f stop? If it does, and he you can change it then that indicates a good connection between camera and lens.

Check that the aperture ring on the lens is set to its smallest aperture (prob f22).

The lens prob has a mf/af switch on the left hand side in addition to the push pull clutch. Check this too.

That's about all of the ideas I can think of. Apologies if some of these are a little obvious. I'm just trying to be thorough.

Cheers
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Ive tried all of that and sadly no luck it dosent even seem to try to focus when on the AF points it just shows one centre I took it into a photog shop today a little specialist in durham they've repaired my dads lenses previously and sadly they had no luck in getting it to work either they tried it on a D300 and called one of their third parties and they don't touch tokina so it looks like I have a £200+ lump of glass and metal

I can MF so its not all bad just a bit of a pain I will try and contact Tokina some how tomorrow to see if its possible Ive seen korna mentioned elsewhere on the web and apparently they are the repair people for tokina

thanks very much for your help though !!
ecniv said:
Possibly there is a switch on the camera to select AF/Manual, this might have changed too... D300 its on the lower left hand side...Disengages the motor screw
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again thanks for the help but Ive tried it on a different camera and had someone else have a go and sadly no luck cheers again :)
 
Shame to hear that.

If its any consolation I was desperately disappointed in my copy. Mine was a f2.6-f2.8 version. I really wanted to love it because of the fantastic build quality and its nice proportions when fitted to my d2x. Unfortunately my copy backfocussed dreadfully. I persevered with it for over a year but got rid when I weighed up just how many missed shots it was costing me. I still haven't found a decent replacement.

Good luck if you go down the repair route. Perhaps it would be worth the cost of a good service if you end up with a useful lens.

Cheers
 
White Rose said:
Shame to hear that.

If its any consolation I was desperately disappointed in my copy. Mine was a f2.6-f2.8 version. I really wanted to love it because of the fantastic build quality and its nice proportions when fitted to my d2x. Unfortunately my copy backfocussed dreadfully. I persevered with it for over a year but got rid when I weighed up just how many missed shots it was costing me. I still haven't found a decent replacement.

Good luck if you go down the repair route. Perhaps it would be worth the cost of a good service if you end up with a useful lens.

Cheers
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good news Im getting a refund it was a shot in the dark but the guy gave the green light its been sent back woohooo now on the hunt for a new lens thanks again for the help
 
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