Patent ID: 7411750

Claim:
An optical sight comprising: an outer barrel having opposite ends; an ocular lens unit mounted to one of said ends of said outer barrel; an objective lens unit mounted to the other one of said ends of said outer barrel; a magnification unit disposed tiltably in said outer barrel, and extending between said ocular and objective lens units; two adjustment units mounted on said outer barrel, and operable independently and respectively to adjust position of said magnification unit inside said outer barrel in first and second directions that are perpendicular to each other; a biasing member interposed between said magnification unit and said outer barrel to provide an urging force on said magnification unit to abut against said adjustment units; and a force-adjusting unit disposed to connect said biasing member to said outer barrel, and operable to adjust the urging force exerted by said biasing member on said inner barrel; wherein said outer barrel includes a barrel wall, said force-adjusting unit including a base that is mounted radially to said barrel wall, and a bolt that includes a bolt shaft and a bolt head, said bolt shaft extending through and engaging threadedly said base, and having one end disposed in said outer barrel and coupled to said biasing member such that rotation of said bolt relative to said base results in adjustment of the urging force exerted by said biasing member on said magnification unit, said bolt shaft further having an opposite end connected to said bolt head and disposed out of said outer barrel.