Abstract: An image magnification control device for a camera. Control focal length required to maintain an image magnification constant is computed based upon defocus infomation detected by using a light having passed through a photographic lens.In case focal length of the photographic lens comes out of a range wherein the set image magnification can be obtained, various operations such as shutter-release lock operation are executed depending upon designs.

Abstract: A ski binding adapted to be displaced between a boot retaining and boot releasing position. The binding includes a jaw and two lateral arms pivotally connected at one end to the ski around a first transverse axis and pivotally connected at their other end to the jaw around a second transverse axis passing through a journal. Also provided is an elastic element for biasing the jaw against pivoting around the second transverse axis, and a retractable support. The support supports the jaw, the arms and the journal when the support is in its active position. The support is also retractable to an inactive position in which the jaw, the arms, and the journal are unsupported by the support. When the support is retracted into this inactive position the jaw, the arms, and the journal can be displaced around the first transverse axis to release the boot from the binding without substantial pivoting around the first transverse axis, and therefore without pivoting against the bias of the elastic element.

Abstract: A protective composition which comprises at least one aliphatic polyisocyanate, at least one aromatic polyisocyanate and a solvent.