S Lenses


CANON 25mm f/3.5

  • Specifications
  • Block diagram
Marketed December 1956
Original Price 32,500 yen (w/case)
Lens Construction (group) 3
Lens Construction (element) 5
No. of Diaphragm Blades 6
Minimum Aperture 22
Closest Focusing Distance (m) 1
Maximum Magnification (x)
Filter Diameter (mm) 40
Maximum Diameter x Length (mm) 48 x 15
Weight (g) 145

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.

Block diagram