specifications:
Focal length: 200mm
Aperture ratio: 1:4
Construction: 6 groups, 9 elements
Coating: S.S.C. (super spectra coating)
Angles of view: Diagonal: 12° Vertical: 7° Horizontal: 10°
Distance scale: (m) 0.58 (magnification 1.0X) to10.OO (ft) 1.9 to 30.OO Focusing mechanism: Helicoid ;
Magnification: Down to l.0X for lens used alone
Minimum aperture: f/32 A Diaphragm: Automatic
Filter size: 58mm
Hood: Built-in type
Cap: C-58 (29-9662)
Function: Auto Aperture, Full aperture metering (AE operation when used with ALL Canon automatic SLR cameras.
Length x max. diameter 182.4mm x 68.8mm
Weight: 880g The 200mm Macro can focus from a life-size image magnification ratio (1:1) to infinity without any additional attachments. The 50mm and 100mm Macros, however, are only capable of shooting up to a magnification of 1:2 when no extension tubes are used.Numbers indicating the magnification ratios are engraved in yellow on the lens barrel so it is easy to see where 1:2 and other magnifications are. Further, the adoption of a two group focusing system in the 200mm Macro lens has reduced barrel extension to a minimum although one would expect an optimum solution with optical solution such as Internal Focusing system be employed for non extension or rotation of the lens barrel. The maximum extension in this case is 38.6mm for recording images at life-size magnification. Things to note is generally, long focal length of macro 200mm lens as compared with the shorter ones, the depth of field is extremely shallow and hence requiring careful attention to focusing and precautions against camera movement. Thus, as a rough rule of thumb, the smaller the extension of the lens barrel and the less camera balance is upset, the better. Use of a cable release or in combination with a monopod or a tripod is recommended whenever shooting close up with this lens. Hand-held photography may be possible with practice but an unstable camera would results in unacceptably blurred images.