Soon after Canon’s new 5D Mark III was released, complaints began to emerge over an issue regarding the camera’s performance in extreme low-light conditions. Photographers found that the Mark III’s top LCD display would leak light into the camera’s body, reach the AE sensor, and affect auto-exposure settings. Watch the video below to see a demonstration of the issue.
Canon admitted to the hardware problem, and said the company is investigating a countermeasure. Once a solution is found, more information will be posted on its Web site, Canon said. The company described the phenomenon thusly:
In extremely dark environments, if the LCD panel illuminates, the displayed exposure value may change as a result of the AE sensor’s detection of light from the LCD panel.
In addition, more reports have surfaced that suggest the issue extends to well-lit conditions, too, such as outside. A separate video on YouTube demonstrates sunlight seemingly leaking through the same top LCD panel, thus affecting auto-exposure settings.
Announced early last month, the $3,500 Mark III is a 22.3-megapixel machine equipped with a full-frame CMOS sensor, a max ISO of 102,400 and the ability to record up to 29 minutes and 59 seconds consecutively. Signs point to this being a pretty significant hardware oversight. If that’s the case, Canon sure has a PR nightmare on its hands.