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205:, in which the positive meniscus element of the front Gauss pair is aspherical. In total, the lens has 8 elements in six groups: a front element, two Gauss pairs, and three additional rear elements.
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In March 1975, Canon introduced a version of the lens, known as the FD 55mm ƒ/1.2 S.S.C. Aspherical. Although, this version was the first to formally signify that it is
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to form in the glass, resulting in an amber discoloration. The discoloration can be repaired by exposure to a source of
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Like a number of other contemporary lenses, the Canon FD 55mm ƒ/1.2 AL incorporated
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305:"Canon inerchangeable lenses FD instructions – www.flynngraphics.ca"
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237:. The inclusion of this compound makes the glass radioactive.
328:"Radioactive Lens – Canon FD 55mm f/1.2 S.S.C. Aspherical"
285:"FD55mm f/1.2 S.S.C. Aspherical – Canon Camera Museum"
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201:The FD 55mm ƒ/1.2 AL uses a variation of the
177:in March 1971. It was the first lens for any
98:8 elements in 6 groups
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185:. The lens was manufactured until 1980.
265:"FD55mm f/1.2 AL – Canon Camera Museum"
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197:Canon FD 55mm ƒ1.2 AL element diagram
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229:, a kind of optical glass that is
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353:"Radiation-induced Discoloration"
170:, first introduced alongside the
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181:SLR system to incorporate an
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119:75.8 mm (2.98 in)
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175:single-lens reflex camera
166:is a camera lens made by
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127:605 g (21.3 oz)
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203:double-Gauss lens design
111:55 mm (2.2 in)
71:0.6 m (24 in)
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164:Canon FD 55mm ƒ/1.2 AL
246:ultraviolet radiation
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68:Close focus distance
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183:aspherical element
76:Max. magnification
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360:www.sealandair.fr
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63:ƒ/1.2 – ƒ/16
16:Photographic lens
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20:FD 55mm ƒ/1.2 AL
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235:thorium dioxide
227:thoriated glass
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153:Discontinuation
132:Filter diameter
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362:. BIRNS, Inc.
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336:. Retrieved
334:. 2011-01-10
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288:. Retrieved
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268:. Retrieved
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145:Introduction
95:Construction
49:Focal length
215:multicoated
108:Max. length
338:2019-01-17
313:2023-06-15
290:2019-01-17
270:2019-01-17
252:References
148:March 1971
135:58 mm
52:55 mm
242:F-centers
172:Canon F-1
85:Diaphragm
60:(max/min)
373:Category
209:Variants
116:Diameter
103:Physical
58:Aperture
332:YouTube
140:History
189:Design
124:Weight
87:blades
356:(PDF)
308:(PDF)
233:with
231:doped
168:Canon
38:Canon
34:Maker
179:35mm
162:The
156:1980
79:0.11
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273:.
90:8
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