Maison Lemaire Paris Field Glass

Maison Lemaire of Paris produced this field glass during the 1860-1870 period, a decade marked by significant developments in portable optical instruments across Europe. The French maker employed traditional materials and construction methods characteristic of mid-19th century optical craftsmanship, resulting in a compact binocular design suited to field observation.

The optical system delivers 3x to 4x magnification through objectives measuring approximately 25-35mm in diameter. Each eyepiece incorporates individual screw adjustment, allowing independent focus correction. The focus mechanism relies on either a sliding bridge or rack focus system, both common approaches in field glasses of this era.

Construction centers on a brass body treated with a blackened finish, accented by polished brass fittings that provide functional and visual contrast. The exterior is protected by either Morocco leather or sharkskin covering, materials selected for durability and grip in field conditions. The complete instrument weighs approximately 10 to 16 ounces, making it portable for extended carry.

The combination of modest magnification, compact dimensions, and protective covering reflects the design priorities of 1860s field optics. The sliding bridge or rack focus system provides mechanical simplicity, while the individual eyepiece adjustments accommodate differences in vision. These features position the Maison Lemaire field glass within the broader context of French optical manufacturing during the Second Empire period.