C al l011 English Edition B*IIJ\& Canon lens FD400mm f/4.5 S.S.C.
Canon Lens FD400mm f/ 4.5 S.S.C. 2 This lens is a super telephoto lens with a rear group focusing system that Canon has just developed . As far as optics are concerned, this 400mm lens has the fastest f/4 .5 lens speed of its kind in the world and provides superb image delineation . Moreover, it boasts of such features as light weight, compactness, smooth focusing, and ease of operation. These established characterises have resulted in a 400mm lens which is suitable for hand held shooting in ordinary use.
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Main Characteristics • 4 New Focus Adjusting Device: Rear Group Focusing System The focusing adjustment is, in general, performed by drawing out the whole lens construction . However, this lens has adopted the focusing system which relies on the rear group of the lens, in which one part of the rear lens group moves while the front lens group and another part of the rear lens group remain fixed.
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Specifications Picture Size : 24 x 36mm Lens Construction : 6 elements in 5 groups Coating : Super Spectra Coating Angle of View : Horizontal 5· 10' 0 Vertical 3 30' 0 Diagonal 6 10' Focusing System : 2 elements in 1 group in the rear lens group move by means of a cam Distance Scales : ft 13 to 200 00 m 4 to 50 L.ens Mount : FD mount (with mount lock), 5 k inds of mount signals. Aperture : FL type automatic aperture, manual lock available. Aperture Scales : 4.
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Mounting on the Cameras This lens can be mounted or dismounted like the other FD lenses. First remove a dust cover from the bayonet ring, then mount the lens on the camera body. The bayonet ring cannot be rotated when the lens is dismounted from the camera body and left without a dust cover . When the lens is mounted on the camera or the dust cover has been attached, the bayonet ring can be rotated. To mount the lens on the camera body, please rotate this bayonet ring all the way until it stops.
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Tripod Mount The tripod mount is designed both for fixing the camera on the tripod for photography and for better balance in hand-held shooting. When the clamp adjustment screw is loosened counterlkwi~, the tripod mount can be rotated around the lens barrel so that the camera can be fixed horizontally and vertically . Please use the camera position indices marked on the mount and on the lens barrel when setting the position. (The horizontal position can be set according to the distance index.
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Focusing Rotate the focusing ring. Even in distance scales greater than 15 meters, the focusing scale was set to increase gradually to make the use of this scale easier. There is some allowance when set at infinity considering the focusing changes due to low temperature, so please make sure to focus while looking through the viewfinder at infinity. Depth of the Field The scales for the depth of the field are read diff.
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Various Couping Mechanisms The coupling mechanisms of this lens are similar to the other FD lenses. When the dust cover is removed from the lens, the lens cannot be stopped down just by moving the automatic aperture lever, nor can the bayonet ring be rotated. These coupling mechanisms work only when the lens is mounted on the camera body. The following description fills you in on these coupling mechanisms: 1. Aperture Signal Lever This lever transmits the automatic preset f/stop to the exposure meter.
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