40D

The Canon EOS 40D is a digital single-lens reflex (DSLR) camera introduced by Canon in 2007. It sits in Canon's mid-range lineup, positioned above entry-level models and the 400D (Rebel XTi). The camera uses an APS-C size CMOS sensor and Canon's DIGIC III image processor, and it supports both JPEG and RAW image formats.

The 40D features a magnesium-alloy chassis with improved sealing and a larger grip for better handling. It includes a 2.5-inch LCD on the back and a control layout that favors fast shooting and manual adjustment for enthusiasts.

It offers around 6.5 frames per second continuous shooting and a sensitivity range of ISO 100 to 3200. It uses a 9-point autofocus system and an improved metering system over its predecessor. It records to CompactFlash media and relies on Canon's DIGIC III processor to handle image processing and menu operations.

The 40D accepts Canon EF and EF-S lenses and was part of the EOS line’s effort to bridge amateur and semi-professional use.

The 40D was generally well received for its improved handling, build quality, and performance relative to earlier entry-level models. It was succeeded by the Canon EOS 50D in 2008, continuing Canon's progression in mid-range DSLR performance. The 40D remains a notable example of Canon's mid-range DSLR design from its era.