Comparison of Nikon 105mm f/2.8 AIS Micro-Nikkor and Pentax SMC P-FA 100mm f/2.8 Macro [S]ave
| Attribute |  Pentax SMC P-FA 100mm f/2.8 Macro × |  Nikon 105mm f/2.8 AIS Micro-Nikkor × |
|---|---|---|
| Aperture (f) | 2.80 - 32.00 | 2.80 - 32.00 |
| Filter Size (mm) | 58 | 52 |
| Notes | Distance scale, Focus range limiter, Focus clamp screw | Classic Nikon F Mount; AIS / AI / NAI Metering Compatibility; Includes front and rear lens caps. |
| Closest Focus (m) | 0.3 | 0.41 |
| Magnification Ratio (x) | 1 | 0.5 |
| Type | Telephoto Prime Macro | Telephoto Macro Prime |
| Focus Details | Internal, manual override | Manual Focus Only; Close Range Correction |
| APS Equivalent | 150mm | 157.5mm |
| Diaphragm Blades | 8 | 9 |
| Image Circle | 35mm | 35mm (FX) |
| Focal Length (mm) | 100.00 | 105.00 |
| Brand | Pentax | Nikon |
| Name | Pentax SMC P-FA 100mm f/2.8 Macro | Nikon 105mm f/2.8 AIS Micro-Nikkor |
| Weight (g) | 601 | 515 |
| Diagonal Angle of View (degree) | 24.50 | 23.30 |
| Length (mm) | 102 | 83.8 |
| Diameter (mm) | 74 | 66 |
| Lens Construction | 9 elements in 8 groups | 10 elements in 9 groups |
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