Today éclair cameras continue to be used on indie productions and are a practical option for cinematographers who prefer to own their gear. The ACL also has one of the most flexible lens mount systems available and intermediate adapters are made for nearly every professional lens mount including PL, Arri, Arri B, Canon, and Nikon.
If you own, or are considering purchasing a used éclair ACL, this site contains a wealth of information for evaluating, operating and maintaining these cameras. The ACL is supported by camera techs around the world and has an active user community on the cinematography.com forums. Links to both are found on the Resources & Links page.
éclair has an interesting company history and the design of the ACL camera evolved over time. A complete historical time-line can be found on the ACL History page.
More information can be found here: Eclair ACL 16mm Motion-Picture Camera