Diagnostics of the studio heavyweight Canon EOS-1Ds Mark II

In the world of photography, the "s" (Studio) in Canon cameras stands for uncompromising full-frame quality. The Canon EOS-1Ds Mark II, introduced in 2004, became the dream of any advertising, fashion or wedding photographer thanks to its colossal resolution of 16.7 megapixels for that time. The cost of this camera was comparable to a car, so it was bought exclusively for heavy commercial work, which makes checking its mileage on the aftermarket absolutely necessary.

Unlike reportage cameras without the letter “s,” this model was less likely to be “shot” in long series. However, studio shooting of lookbooks or catalogs involves daily monotonous work, where a thousand or two shots are taken per shift under powerful flashes. Therefore, even if the camera did not see rain and dirt, its mechanical shutter could be fairly worn out over years of commercial use.

Specifics of wear of full-frame mechanics

The mechanics of full-frame cameras are always subject to greater stress than crop systems. The heavy full-frame mirror and large shutter blades require heavy-duty springs and a robust damping system to dampen vibrations. The 1Ds Mark II shutter was designed for a guaranteed 200,000 actuations.

Studio operation is usually more gentle on mechanics than shooting in the cold, so these shutters often lasted significantly longer than their declared lifespan. However, time takes its toll. Metal fatigue in the guides and springs can result in uneven exposure at short shutter speeds. Buying a car with mileage up to 100 thousand is a great deal, but anything more than 200 thousand is a risk.

Analyzing old RAW files to get mileage

Canon has never hidden the mileage of its flagships. The DIGIC II processor integrates a hard, non-resettable counter that adds up each mirror lift and shutter operation. This information, invaluable for the buyer of used equipment, is recorded in the structure of each image file.

The data is stored in a proprietary metadata block (MakerNotes). Unfortunately, Photoshop or Lightroom often overwrites this block when saving a JPEG. Therefore, to reliably determine the mileage, you will need the original, untouched RAW file (.CR2) directly from the camera’s flash drive.