Canon EF50mm f/1.0L USM

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Canon's 1989 50mm f1.0 lens was only ever produced in small numbers, and at f/1.0 was the fastest Canon lens in production. The optical construction of this lens contains 11 lens elements in 9 groups, including two ground and polished aspherical lens elements. It has a floating front extension focusing system, using a ring-type USM motor.

Not at all easy to find - expect to pay a lot of money for a used example.

Launched	September 1989
Lens Construction (group)	9
Lens Construction (element)	11
No. of Diaphragm Blades	8
Minimum Aperture	16
Closest Focusing Distance (m)	0.6
Maximum Magnifcation (x)	0.11
Filter Diameter (mm)	72
Maximum Diameter x Length (mm)	91.5 x 81.5
Weight (g)	985

Lens construction

EF50mm f/1.0L USM reviews and articles

• Review and article - Bryan Soderlind
• Wikipedia
• Fred Miranda
• Bokeh samples
• Lens Review
• ePhotozine

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Sample images