30d

30D commonly denotes the Canon EOS 30D, a digital single-lens reflex camera released by Canon in 2006 as part of its EOS DSLR lineup. It is the successor to the EOS 20D and was succeeded by the EOS 40D in 2007, reinforcing Canon's mid-range offering for enthusiasts. The camera uses Canon's EF-S lens mount, allowing use of lenses designed for APS-C sensors. It records images to CompactFlash memory cards and supports both RAW and JPEG formats, with flexible exposure controls including manual, aperture-priority, shutter-priority, and program modes.

The EOS 30D features an approximately 8.2-megapixel APS-C CMOS sensor and improved autofocus and metering over its predecessor. It provides a continuous shooting rate perceived as adequate for action photography and includes an expanded ISO range to accommodate varying lighting conditions. The camera includes a bright optical viewfinder, a 2.5-inch LCD, and a robust control layout optimized for reliability and usability in fieldwork. It also offers USB connectivity for data transfer and camera-to-computer operation.

In the broader context, 30D is primarily known as Canon's 30D. The term may appear in collections of Canon cameras, photography forums, and historical overviews of Canon's DSLR progression in the mid-2000s.