Comparison of Pentax 55-300mm f/4-5.8 ED SMC DA and Tamron AF 70-300mm f/4-5.6 LD Macro 1:2 [S]ave
| Attribute |  Tamron AF 70-300mm f/4-5.6 LD Macro 1:2 × |  Pentax 55-300mm f/4-5.8 ED SMC DA × |
|---|---|---|
| Aperture (f) | 4.00 - 22.00 | 4.00 - 32.00 |
| Filter Size (mm) | 62 | 58 |
| Notes | Available AF Mounts: Canon, Minolta, Nikon, Pentax; Included Accessories: Lens Hood | Included Accessories: Lens Hood |
| Closest Focus (m) | 0.95 | 1.4 |
| Magnification Ratio (x) | 0.5 | 0.28 |
| Diameter (mm) | 76.6 | 71 |
| Type | Telephoto Zoom | Telephoto Zoom |
| APS Equivalent | 1.5x: 105 - 450mm; 1.6x: 112 - 480mm | 82.5 - 450mm |
| Diaphragm Blades | 9 | 6 |
| Image Circle | 35mm | APS-C |
| Focal Length (mm) | 70.00 - 300.00 | 55.00 - 300.00 |
| Brand | Tamron | Pentax |
| Name | Tamron AF 70-300mm f/4-5.6 LD Macro 1:2 | Pentax 55-300mm f/4-5.8 ED SMC DA |
| Weight (g) | 435 | 440 |
| Diagonal Angle of View (degree) | 8.00 - 34.00 | 5.40 - 29.00 |
| Lens Construction | 13 elements in 9 groups, including 1 LD element | 12 elements in 8 groups, including ED elements |
| Zoom System | Rotary | Rotary |
| Length (mm) | 116.5 | 111.5 |
| Front Element Rotation | - | - |
| Focus Details | - | Quick-shift Focus System |
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