Comparison of Canon EF 135mm f/2L USM and Pentax SMC P-FA 100mm f/2.8 Macro [S]ave
| Attribute |  Canon EF 135mm f/2L USM × |  Pentax SMC P-FA 100mm f/2.8 Macro × |
|---|---|---|
| Diagonal Angle of View (degree) | 18.00 | 24.50 |
| Filter Size (mm) | 72 | 58 |
| Aperture (f) | 2.00 - 32.00 | 2.80 - 32.00 |
| Closest Focus (m) | 0.9 | 0.3 |
| Magnification Ratio (x) | 0.19 | 1 |
| Type | Telephoto Prime | Telephoto Prime Macro |
| Focus Details | Inner focusing; full-time manual focus and USM | Internal, manual override |
| APS Equivalent | 216mm | 150mm |
| Diaphragm Blades | 8 | 8 |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 135.00 | 100.00 |
| Brand | Canon | Pentax |
| Name | Canon EF 135mm f/2L USM | Pentax SMC P-FA 100mm f/2.8 Macro |
| Weight (g) | 750 | 601 |
| Diameter (mm) | 82 | 74 |
| Length (mm) | 112 | 102 |
| Notes | - | Distance scale, Focus range limiter, Focus clamp screw |
| Lens Construction | 10 elements in 8 groups, including 2 UD elements | 9 elements in 8 groups |
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