Comparison of Pentax SMC P-FA 135mm f/2.8 IF and Sony 18-135mm f/3.5-5.6 DT SAM SAL18135 [S]ave
| Attribute |  Sony 18-135mm f/3.5-5.6 DT SAM SAL18135 × |  Pentax SMC P-FA 135mm f/2.8 IF × |
|---|---|---|
| Diaphragm Blades | 7 | - |
| Diagonal Angle of View (degree) | - | 18.00 |
| Diameter (mm) | 73 | 64 |
| Filter Size (mm) | 62 | 52 |
| Aperture (f) | 3.50 - 40.00 | 2.80 - 22.00 |
| Diaphragm Blades Type | circular | - |
| Type | Standard Zoom | Telephoto Prime |
| APS Equivalent | 27 - 202.5mm | 202.5mm |
| Lens Construction | 15 elements in 13 groups, including 3 aspheric and 2 ED glass elements | 8 elements in 7 groups |
| Image Circle | APS-C | 35mm |
| Focal Length (mm) | 18.00 - 135.00 | 135.00 |
| Brand | Sony | Pentax |
| Name | Sony 18-135mm f/3.5-5.6 DT SAM SAL18135 | Pentax SMC P-FA 135mm f/2.8 IF |
| Weight (g) | 405 | 374 |
| Magnification Ratio (x) | 0.27 | - |
| Length (mm) | 85.5 | 79 |
| Notes | Sony A-Mount. Included Accessories: SH0008 petal lens hood, caps | - |
| Closest Focus (m) | 0.45 | 0.7 |
| Zoom System | Rotary | - |
| Focus Details | Internal focusing; Smooth Autofocus Motor (SAM) with Direct Manual Focus (DMF) | Internal |
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