Comparison of Canon EF 600mm f/4L IS USM and Pentax SMC P-FA 600mm f/4 ED IF [S]ave
| Attribute |  Canon EF 600mm f/4L IS USM × |  Pentax SMC P-FA 600mm f/4 ED IF × |
|---|---|---|
| Notes | Image Stabilization | Included Accessories: Case |
| Magnification Ratio (x) | 0.12 | - |
| Filter Size (mm) | 52 | 43 |
| Focus Details | Inner focusing; full-time manual focus and USM | Internal |
| Closest Focus (m) | 5.5 | 5 |
| Lens Construction | 17 elements in 13 groups, including 1 flourite, 2 UD elements | 9 elements in 7 groups |
| Length (mm) | 456 | 457 |
| Focal Length (mm) | 600.00 | 600.00 |
| APS Equivalent | 960mm | 900mm |
| Brand | Canon | Pentax |
| Image Circle | 35mm | 35mm |
| Name | Canon EF 600mm f/4L IS USM | Pentax SMC P-FA 600mm f/4 ED IF |
| Weight (g) | 5360 | 6450 |
| Type | Telephoto Prime | Telephoto Prime |
| Aperture (f) | 4.00 - 32.00 | 4.00 - 32.00 |
| Diaphragm Blades | 8 | - |
| Diagonal Angle of View (degree) | 4.20 | 4.10 |
| Diameter (mm) | 168 | 175 |
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