20 Most Recent Tokina 12-24mm /f4.0 for Canon Questions & Answers

One of the internal circuits on the lens got more than a little wet. How long did you let it dry before putting it on the camera (which applies voltage to the possibly still wet circuit and probably shorted it out) ?. It sounds like a trip to Tokina is in order, unless you want to start a career as a repairman yourself

Try gently cleaning the contacts between the lens and the camera.

I have the exact same problem, it's the aperture flex cable which have a design flaw. At 12mm the flex is stretched at maximum and over the years loses its flexibility and breaks. Mine works fine from 24 to 15mm. Below 15 the camera always reports err01. All flex cables in the tokina are welded -IMHO you need to take it to a professional.

diaphragm problem, send to www.thkphoto.com/support/support-05.html cost around $90.00 to repair

It can be repaired.

It is advised you take it to a local camera shop that does repairs.
They can give you a quote at the time of service.


Due to the tight tolerances inside the lense mechanism - small bits of sand or lint may become trapped in the mechanics.

It is advised to take it to a camera repair shop and have it disassembled and cleaned/repaired.

There are many small parts and intricacies that will render it totally useless if not done properly.

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Most likely something bad has happened. It out of warranty, usually its 5 years. This is a pro job, getting to anything inside a lens is a very special job. There are a number of places to send it out. Check http://www.acecam.com/srindex.html and write to one or two of the places for estimates. It could be $150 or more plus shipping and taxes. A new one is about $400+, you could check around the many on-line camera stores for a used one. Could be a simple electronic part or the iris blades are bad.

What about it, and why do you want it ? It is simplicity itself - attach the lens to the camera, switch on the camera, frame the subject and shoot.

THIS IS NOT POSSIBLE WITHOUT SPECIAL TRAINING AND TOOLS. SEND TO AUTH SERVICE CENTER OR REPLACE.

What does the FEE or error message displayed on an SLR camera mean... The link is to a Nikon error page which explains what could cause this error. Is the lens set to the smallest aperture? If not this would cause this error.

This will depend on the lens you have now.

Some Tokina lenses have a universal fitting, with a separate adaptor mount for each camera body they fit. Its usually the last 5 - 10mm of the mount, and its identifiable by a second release button, which allows the specific fitting to be changed. If you have one of those, you just need the Nikon fitting.

If the P/K mount is an integral part of the lens, you have a couple of choices.
(1) You could get an engineering shop to alter the mount. This costs a lot and probably isn't worth the hassle. (It might be better to sell your lens and buy the nikon equivalent).
(2) You could use an adaptor. These are readily available on eBay.
For example:
http://cgi.ebay.co.uk/Pentax-PK-K-Lens-to-Nikon-AI-AF-F-camera-mount-Adapter_W0QQitemZ150400359906QQcmdZViewItemQQptZUK_Photography_CameraLenses_Lens_caps_hoods_adaptors_ET?hash=item23048f5de2

Note that just because it has the right (i.e. Nikon) fitting, it doesn't mean that it will necessarily have full functionality on the body you intend to use with it.

Some Nikon bodies are "extremely fussy" about which lenses they can use, and it might be worth evaluating whether your proposed solution would work with the camera body you have in mind before committing to any sort of expenditure.

Err99 is very difficult to diagnose without having the camera/lens looked at by a good reapirer who can actually extract more detailed error messages from within the camera itself that are more helpful than just the "Err99" message that shows on screen. Err99 could mean 100 different problems as it is a global Canon code error... Some of the causes could be:

Lens/camera electrical contact failure

Lens circuit (AF or IS) failure

Camera electronic circuit failure (see below)

Battery or Grip problems

Broken or stuck lens aperture diaphragm – Note: this most often happens only when the lens is completely stopped down. If you have questions about the lens, shoot it both wide open and stopped down. If ERR99 appears when stopped down, its an aperture issue.

Older third-party lens with incompatible electronics

Jammed or damaged camera shutter curtain

Mis-formatted or damaged card

Damaged or corroded cell within camera battery

Failure of the sequence motor—according to precision this is unusual, but does occur, especially in older cameras that have been through a shutter replacement.

Corroded battery or camera contacts

Incorrectly mounted battery grip, particularly if it’s too loose

Camera/hot shoe electrical contact failure

Moisture condensation within camera or lens (or corrosion occurring days or weeks after moisture exposure)

If none of the above seem to fix the problem, your next best shot is to seek repair (if it is worth doing so).