Comparison of Nikon 300mm ƒ/4E PF ED VR AF-S Nikkor and Pentax SMC P-FA 135mm f/2.8 IF [S]ave
| Attribute |  Nikon 300mm ƒ/4E PF ED VR AF-S Nikkor × |  Pentax SMC P-FA 135mm f/2.8 IF × |
|---|---|---|
| Closest Focus (m) | 1.4 | 0.7 |
| Magnification Ratio (x) | 0.24 | - |
| Length (mm) | 147.5 | 79 |
| Focus Details | Internal focusing with Silent Wave motor; A/M-M/A-M switch | Internal |
| Diagonal Angle of View (degree) | 8.20 | 18.00 |
| Diaphragm Blades | 9 | - |
| Image Circle | 35mm | 35mm |
| Aperture (f) | 4.00 - 32.00 | 2.80 - 22.00 |
| Name | Nikon 300mm ƒ/4E PF ED VR AF-S Nikkor | Pentax SMC P-FA 135mm f/2.8 IF |
| Brand | Nikon | Pentax |
| Weight (g) | 755 | 374 |
| Type | Telephoto Prime | Telephoto Prime |
| Lens Construction | 16 elements in 10 groups; including 1 Aspherical, 1 PF (Phase Fresnel), and 1 ED element; Nano Crystal Coat | 8 elements in 7 groups |
| Filter Size (mm) | 77 | 52 |
| Focal Length (mm) | 300.00 | 135.00 |
| Notes | Image Stabilized (4.5 stops); Included Accessories: CL-M3 case, HB-73 hood, front and rear lens caps | - |
| APS Equivalent | 450mm | 202.5mm |
| Diaphragm Blades Type | rounded | - |
| Diameter (mm) | 89 | 64 |
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