Canon EOS-1 series professional film SLR, the finest Canon film body with advanced AF and weather-sealed construction.
The Canon EOS 1X appears to be a listing for a Canon EOS-1 series professional body, likely the EOS-1N or EOS-1V — Canon's flagship 35mm autofocus SLR bodies built for professional sports, news, and event photography. The EOS-1 series represented Canon's absolute finest film SLR engineering.
EOS-1 series bodies feature the most advanced autofocus systems, fastest motor drives, and most robust weather-sealed construction in the Canon film SLR lineup. Professional features include cross-type AF sensors, high-speed motor drives up to 10fps, and magnesium alloy bodies sealed against dust and moisture.
Build quality is Canon's professional standard — the most robust and reliable 35mm SLR bodies Canon ever produced, designed for daily professional abuse in the most demanding conditions. The Canon EF mount provides access to the world's largest professional lens ecosystem.
Canon EOS-1 series bodies command strong prices on the used market as the finest Canon film SLR bodies for professional sports and photojournalism. The specific model determines exact capability, but all EOS-1 variants provide professional-grade performance.