After already issuing their first product advisory regarding the recently released T4i/650, clarifying a small issue concerning EXIF data, Canon is back with yet another unfortunate public statement, revealing not only a presumably odd cosmetic snafu, but also a potentially harmful health risk as well.
Canon is advising that certain serial numbered T4i/650s contain an unnecessarily high amount of rubber accelerator held within the left and right front grips, resulting in a chemical reaction that may turn them white, or worse, trigger an allergic reaction. Here’s what the camera maker revealed:
The front rubber grips of some EOS REBEL T4i units produced in certain lots during the sixteen-day period between May 31st through June 15th, 2012 may turn white after a short period of time. We have determined after inquiry with the rubber manufacturer and analysis, that the substance zinc bis (N,N’-dimethyldithiocarbamate) is what causes the rubber surface to turn white.
Zinc bis is not used in the production of this product. However, the quantity of rubber accelerator used in the affected production lots was slightly higher than usual. As a result the rubber grips may turn white due to a chemical reaction with the rubber accelerator and other substances. High temperature and high humidity may contribute to this condition. Zinc bis (N,N’-dimethyldithiocarbamate), which becomes deposited on the rubber surface, is created as a result of this chemical reaction.
If your T4i’s serial number contains a “1″ as its sixth digit, there may be chance your model is affected by the aforementioned. To be safe, be sure to register your camera with Canon HERE, and hold tight until their free repair service comes online around “mid July 2012.”
More information on the service advisory can be found HERE.