Patent ID: 6337955
Filing Date: 2002-01-08
Classification: G03B,H04N

Abstract:
An SLR camera system comprising:a camera body comprising a focal plane shutter; an interchangeable lens detachably attached to said camera body, said interchangeable lens comprising a lens shutter; a film back and a digital back which are selectively attached to said camera body, said film back accommodating a light-sensitive film which is to be positioned, upon the attachment thereof to said camera body, at a focal plane located in said camera body, said digital back comprising an image pick-up device, said image pick-up device having a sensitive surface which is positioned at said focal plane upon the attachment of said digital back to said camera body; a drive mechanism, provided in said digital back, which drives said image pick-up device in a direction of an optical axis of said interchangeable lens; and a controller which controls said focal plane shutter, said lens shutter, and said drive mechanism when said digital back and said interchangeable lens are attached to said camera body; wherein when said digital back and said interchangeable lens are attached to said camera body, upon receiving a shutter release signal, said controller controls said focal plane shutter to fully open and subsequently controls said drive mechanism to advance said image pick-up device so as to move said sensitive surface thereof to said focal plane before controlling said lens shutter to operate, and wherein said controller controls said drive mechanism to retreat said image pick-up device and subsequently controls said focal plane shutter to shut after controlling said lens shutter to operate.