A vintage Japanese Canon FX SLR camera with a Canon FD 35-70mm camera zoom lens. The Canon FX is a 35 mm SLR manufactured by Canon Inc. of Japan and introduced in April 1964. It introduced the Canon FL lens mount, the successor to the Canon R. The camera has a built-in lightmeter using a CdS photocell mounted on the photographers left-hand side. A lever switched between low sensitivity for bright subjects EV 9–18 and high sensitivity for dark subjects EV 1-10 at ISO 100. Film speeds supported are ISO 10 through 800. Vintage Cameras And Photo Equipment For Collectors.