Canon makro lens fd 50mm f3.5 instructions user manual. Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Canon makro lens fd 50mm f3.5 instructions user manual(3611011 CANON MACRO LENS FD5omm f/3.5The Canon FD 5omm f/3.5 Macro is a very special lens designed for both normal and close-up shooting. While it can be used as a normal standard lens for shooting at distances up to infinity, its unusually long helicoid permits focusing down to 23.2cm for a maximum magnification of ’/zX. When Extension Tube FD 25~U is attached, the magnification can be varied continuously between ‘/zX and 1X with a minimum focusing distance of 20.5om. Whether used with or without the extension tube, all this is possible with normal full-aperture, through- the-lens metering (on a full-aperture-metering SLR) and normal AE photography (on an AE SLR). This lens is specially corrected for those aberrations which usually occur at abnormally close shooting distances. Whether it is used for normal or close-up shooting, it will give high resolution and contrast and excellent definition.