Focal Length & Max. Aperture: |
17-40mm 1:4 |
Filter Diameter: |
77mm |
Magnification with Extension Tube EF12: |
0.83x - 0.32x |
Magnification with Extension Tube EF25: |
1.02x - 0.70x |
Diagonal Angle of View: |
104° - 57° (43.2mm) |
Horizontal Angle of View: |
93° - 49° (36mm) |
Lens construction: |
12 elements in 9 groups |
Minimum aperture: |
f/22 |
No. of aperture blades: |
7 (circular aperture) |
Closest focusing distance (m): |
0.28m |
Focus drive: |
Ultrasonic |
Dimensions: |
83.5mm dia. x 96.8mm |
Weight: |
475g |
All data based on Canon's Standard Test Method: |
Subject to change without notice: |
