Why does my Canon 18-55 EFS lense works ok from 24mm and upwards. From 24 down to 18 Err 99 occurs. any sugestions?

SOURCE: Quantaray lenses

I bet they are not AF lenses. There are adapters that add the AF contacts to "fool" the camera but increase the zoom. You can get used lenses from many "on line" camera stores with warranties for a few months.

SOURCE: I'm using Tokina 12-24mm f4 on my Canon EOS 20D.

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.

SOURCE: Canon Zoom Lens EF-S 17-85mm 1:4-5.6 USM: I

I hate to re-invent the wheel (and I don't want to cut 'n paste someone else's hard work to present as my own) so please click here for a likely practical solution which usually works and for Canon's own suggestions on the error 99 fault.

If this has assisted you then please rate my answer; if not then add a comment to provide feedback and I'll attempt to provide an alternative solution.

SOURCE: Problem shooting AEB with EFS 17-85 F/4-5.6 IS USM

Your flex cable to the Iris is broken. Have a look at my gallery at http://www.pbase.com/barry_2718/efs1785mm

per_hoffmann

• 2 Answers
• Posted on Sep 14, 2012

SOURCE: my 60d finding ERR 01

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.