Comparison of Canon EF 135mm f/2.8 Soft Focus and Pentax SMC P-FA 135mm f/2.8 IF [S]ave
| Attribute |  Canon EF 135mm f/2.8 Soft Focus × |  Pentax SMC P-FA 135mm f/2.8 IF × |
|---|---|---|
| Brand | Canon | Pentax |
| Name | Canon EF 135mm f/2.8 Soft Focus | Pentax SMC P-FA 135mm f/2.8 IF |
| Focal Length (mm) | 135.00 | 135.00 |
| Image Circle | 35mm | 35mm |
| Diaphragm Blades | 6 | - |
| APS Equivalent | 216mm | 202.5mm |
| Focus Details | Inner focusing | Internal |
| Length (mm) | 98 | 79 |
| Magnification Ratio (x) | 0.12 | - |
| Closest Focus (m) | 1.3 | 0.7 |
| Filter Size (mm) | 52 | 52 |
| Aperture (f) | 2.80 - 32.00 | 2.80 - 22.00 |
| Diagonal Angle of View (degree) | 18.00 | 18.00 |
| Weight (g) | 390 | 374 |
| Lens Construction | 7 elements in 6 groups, including 1 aspherical element; Super Spectra coatings | 8 elements in 7 groups |
| Type | Telephoto Prime Soft Focus | Telephoto Prime |
| Diameter (mm) | 69 | 64 |
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