Sigma: “Oops! Sorry, But We’ll Fix that For Free”

Sigma APO 120-400mm F4.5-5.6 DG OS HSM Telephoto Lens

Sigma Corporation has issued an advisory to Canon 40D owners using the company’s APO 120-400mm F4.5-5.6 DG OS HSM or APO 150-500mm F5-6.3 DG OS HSM lenses.

There’s a firmware defect that decreases the number of continuous frames per second when the Canon 40D digital SLR is in AI Servo AF mode, and the APO 120-400mm F4.5-5.6 DG OS HSM for Canon or APO 150-500mm F5-6.3 DG OS HSM for Canon lenses are attached to the camera with the OS function switched ON.

Sigma says they will fix this for free. There’s a free-upgrade service to their customers available at their website.

The lenses requiring update for EOS 40D camera are:
APO 120-400mm F4.5-5.6 DG OS HSM for Canon Serial Number lower than 1011001
APO 150-500mm F5-6.3 DG OS HSM for Canon Serial Number lower than 1007001

Except for the above serial numbers, the other lenses are fine.

[Site: Sigma]

Chris Malinao

About Chris Malinao

Chris teaches Lightroom as workflow software to photography students at the FPPF, Federation of Philippine Photographers Foundation. He also teaches smartphone photography.

Carl Zeiss Jena 25cm f6.3 Tessar in wood lensboard rare early lens large format  picture
Carl Zeiss Jena 25cm f6.3 Tessar in wood lensboard rare early lens large format
Vintage Rolleiflex Franke Heidecke Compur TLR Camera Zeiss Tessar f7.5cm w/Case picture
Vintage Rolleiflex Franke Heidecke Compur TLR Camera Zeiss Tessar f7.5cm w/Case
Carl Zeiss Jena Tessar 50mm f2.8 T lens picture
Carl Zeiss Jena Tessar 50mm f2.8 T lens
Carl Zeiss Tessar f2.8 45mm lens w/ correct cap picture
Carl Zeiss Tessar f2.8 45mm lens w/ correct cap
Vintage Carl Zeiss Pro Tessar 1:4 f=115mm Lens picture
Vintage Carl Zeiss Pro Tessar 1:4 f=115mm Lens