Comparison of Pentax 300mm f/4 ED IF SDM SMC DA* and Sigma APO 100-300mm ƒ/4 EX DG HSM [S]ave
| Attribute |  Sigma APO 100-300mm ƒ/4 EX DG HSM × |  Pentax 300mm f/4 ED IF SDM SMC DA* × |
|---|---|---|
| Filter Size (mm) | 82 | 77 |
| Notes | Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Pentax, Sony | Included Accessories: PH-RBK Hood, Detachable Tripod Mount, Case |
| Closest Focus (m) | 1.8 | 1.4 |
| Magnification Ratio (x) | 0.2 | 0.24 |
| Type | Telephoto Zoom | Telephoto Prime |
| Focus Details | Internal; HSM with full-time manual override | Internal, SDM (Supersonic Motor) with Quick-shift Focus System |
| APS Equivalent | 1.5x: 150 - 450mm; 1.6x: 160 - 480mm | 450mm |
| Diameter (mm) | 92.4 | 83 |
| Image Circle | 35mm | APS-C |
| Focal Length (mm) | 100.00 - 300.00 | 300.00 |
| Brand | Sigma | Pentax |
| Name | Sigma APO 100-300mm ƒ/4 EX DG HSM | Pentax 300mm f/4 ED IF SDM SMC DA* |
| Weight (g) | 1440 | 1070 |
| Aperture (f) | 4.00 - 32.00 | 4.00 - 32.00 |
| Diaphragm Blades | 9 | 9 |
| Diagonal Angle of View (degree) | 8.20 - 24.40 | 5.40 |
| Length (mm) | 226.5 | 184 |
| Zoom System | Rotary; Internal | - |
| Lens Construction | 16 elements in 14 groups, including 4 SLD elements | 8 elements in 6 groups |
Help · Contact us · Disclaimer · Contributors · Developers · Donate