The camera that democratised full-frame — Canon's first affordable FF DSLR with 12.8MP and the massive EF lens ecosystem.
The Canon EOS 5D (2005) was the first affordable full-frame DSLR, bringing 35mm-equivalent sensor size to enthusiast photographers at roughly half the price of the 1Ds Mark II. It fundamentally changed the market by proving full-frame did not have to mean professional-only pricing.
12.8MP by modern standards is low, but the full-frame sensor delivers pleasing depth of field, good dynamic range at base ISO, and clean files up to about ISO 1600. 9-point AF with 6 assist points. 3fps burst. No live view or video.
Canon EF mount. 3-inch fixed LCD. Single CF card slot. 810g body. Weather sealed to a moderate standard. No built-in flash. 100% viewfinder coverage — unusual at this price in 2005.
Very common and cheap used. Check shutter count — rated 100,000. The 5D Mark II is a much better buy with 21MP and video. The original 5D is now a collector's milestone — the camera that changed everything.