Specifications for the EF 180 f /3.5L Macro USM Marketed April 1996 Lens Construction (group) 12 Lens Construction (element) 14 No. of Diaphragm Blades 8 Minimum Aperture 32 Closest Focusing Distance (m) 0.48 Maximum Magnifcation (x) 1.0 Filter Diameter (mm) 72 Maximum Diameter x Length (mm) 82.5 x 186.6 Weight (g) 1,090
The Variable Aperture AE control will not operate, but you can manually adjust the aperture ring of the lens. A basic exposure guide to follow for bright sunlight (with distinct shadows) is to make a fraction representing the shutter speed needed at f /16 by putting a "one" over the film's ASA rating. With a film of ASA 100, use 1/100 sec.