Comparison of Pentax SMC P-FA 100mm f/2.8 Macro and Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017) [S]ave
| Attribute |  Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017) × |  Pentax SMC P-FA 100mm f/2.8 Macro × |
|---|---|---|
| Filter Size (mm) | 62 | 58 |
| Notes | Available mounts: Canon EF, Nikon F, Sony A; Optical Image Stabilization (3.5 stops); Weather resistant; Compatible with TAMRON TAP-in Console | Distance scale, Focus range limiter, Focus clamp screw |
| Closest Focus (m) | 0.3 | 0.3 |
| Magnification Ratio (x) | 1 | 1 |
| Type | Telephoto Prime Macro | Telephoto Prime Macro |
| Focus Details | Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism | Internal, manual override |
| APS Equivalent | 1.5x: 135mm; 1.6x: 144mm | 150mm |
| Diameter (mm) | 79 | 74 |
| Image Circle | 35mm | 35mm |
| Focal Length (mm) | 90.00 | 100.00 |
| Brand | Tamron | Pentax |
| Name | Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017) | Pentax SMC P-FA 100mm f/2.8 Macro |
| Weight (g) | 610 | 601 |
| Aperture (f) | 2.80 - 32.00 | 2.80 - 32.00 |
| Diaphragm Blades | 9 | 8 |
| Diagonal Angle of View (degree) | 27.00 | 24.50 |
| Length (mm) | 116.8 | 102 |
| Diaphragm Blades Type | rounded | - |
| Lens Construction | 14 elements in 11 groups, including 2 XLD (Extra Low Dispersion) and 1 LD (Low Dispersion) elements; eBAND and BBAR coatings | 9 elements in 8 groups |
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