specifications:
Focal length: 50mm
Aperture ratio: 1:3.5
Construction: 4 groups, 6 elements
Coating: S.S.C. (super spectra coating)
Angle of view: Diagonal: 46° Vertical: 27° Horizontal: 40°
Diatance scale: (m) 0.23 (magnification 0.5X) to 3.OO (ft) 0.31 to 10.OO
Focusing mechanism: Helicoid
Magnification: 0.5X for lens used alone, 0.5-1.0X with Extension Tube FD25-U (0.21m)
Minimum aperture: f/32.A
Diaphragm: Automatic
Filter size: 52mm
Hood: BW-52A
Cap: C-52 (CG2-0070)
Function: Auto Aperture, Full aperture metering (AE operation when used with ALL Canon automatic SLR cameras.
Length x max. diameter: 57mm x 63mm
Weight: 235g With this lens alone, focusing from 0.23m (one-half life-size) to infinity for general photography is possible. High resolution and high contrast characteristics make this an extremely useful lens. With the same angle of view as the standard 50mm lens, this lens offers the added advantage of close-up photography.