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|Maximum format:||35mm full frame|
|Diagonal angle of view:||81.7° (35mm full frame)|
|Lens construction:||5 elements in 3 groups|
|Closest focusing distance:||100 cm|
|Number of diaphragm blades:||6|
|Maximum diameter x Length:||Ø48 x 15 mm|
|Materials:||Metallic barrel, metallic mount|
|Filter size:||40 mm|
Design and Features
A super wide angle lens with a diagonal angle of view 82°, developed based on Topogon (manufactured by Carl Zeiss, Germany. Angle of view: 100°. f/6.3). This lens has a unique optical system: a spherical lens element with a very high refraction index is used as the first lens element and a special optical glass lens element with the infinite radius of curvature is used as the rearmost lens element. This lens was the fastest lens in the world as a 25mm lens at the time.
Alternatives (MF, 22..28 mm)
|Canon 28mm F/3.5 II||1957||⊗|
|Canon Serenar 28mm F/3.5 I||1951||⊗|