FD Resources - Zoom lenses
FD 28-50mm f/3.5 S.S.C. Zoom Lens
A wide-angle zoom which covers the very frequently used range of 28mm, 35mm, and 50mm. With this convenient lens, you can change freely from an angle of view of 75° to 46°. The two-group design minimizes spherical aberration, coma and astigmatism to give image quality as high as that of a fixed focal length lens.
This lens combines a zoom ratio of 1.79 with compactness, portability and ease of use, making it a favorite with users. A close focusing feature incorporated in its design enables focusing down to 0.25 meter (magnification 0.23 X) without the aid of an extension accessory.
NOTE:- Info on the NEWER autofocus version
Wide-Angle to Standard Zoom Lens
Comprised of 28mm, 35mm and 50mm focal lengths, the 28-50mm f/3.5 zoom spans the range between a moderate wide-angle and a standard lens. Its zoom ratio of 1.79 may, like that of the 24-35mm zoom lens, seem small but it has even broader zooming capabilities with endless practical and creative applications. As with the wide-angle zoom lens, combining focal length with camera-to-subject distance permits variations of perspective rendition. In addition to controlling perspective with focal length, you can exaggerate its effects with high or low camera angles.
Close Focusing Canon's fixed focal length lenses are designed so that the closest focusing distance is approximately ten times the lens' focal length. For example, the closest focusing distance for the 28mm fixed focal length is 30cm (about 12 in.) and for the 50mm it is 45cm (about 18 in.). Due to aberration corrections this principle applies, in the case of a zoom lens, to its longest focal length. Thus with the 28-50mm zoom lens, the closest focusing distance is based on the 50mm focal setting. However, this results in a difference between the closest shooting distance of a fixed focal length 28mm lens and that of the 28mm range of the 28-50mm zoom lens. To overcome this discrepancy, a special macro focusing mechanism incorporated in this zoom lens enables close-up shooting.
Credit: image courtesy of "Achim Kuhl" <firstname.lastname@example.org>
The macro setting of the 28-50mm zoom makes it a versatile lens, one capable of handling a wide range of subject matter. If you plan to travel light on your next vacation, it is definitely a lens to consider. Using its wide zoom range and close shooting capability, you'll be sure to bring home an exciting presentation of your travels. When Canon introduced its T-series cameras beginning with the T50 in 1983 and the T70 in 1985, they also came in kit forms with their respective standard FD zoom lenses. The T70's version was the New FD 28-55mm f/3.5-4.5, which was a compact and lightweight zoom that also replaced the FD 28-50mm f/3.5 lens featured here.
Focal length: 28-50mm
Aperture ratio: 1:3.5
Construction: 10 elements in 9 groups
Coating: S.S.C. (super spectra coating)
Angle of view: Diagonal: 75° - 46'; Vertical: 46° - 27°; Horizontal: 65° - 40°
Distance scale: (m) l (28mm at 1m, 0.03 magnification) (50mm at 1m, 0.05 magnification) 10. OO (ft) 3.5 - 30.OO
Macro mechanism: 0.25m (magnification 0.23) - 0.6m
Focusing mechanism: Rotation of front lens groupZooming: Rotation of zooming ring
Minimum aperture: f/22. A
Filter size: 58mm
Length x max. diameter: 99.5m x 69mm
Canon FD mount Camera Bodies:
A Series: AE-1 | AT-1 | A-1 | AV-1 | AE-1 Program | AL-1
T- Series: T50 | T60 | T70 | T80 | T90
F-1 | New F-1
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