Comparison of Nikon 40mm ƒ/2.8G AF-S DX Micro Nikkor and Pentax SMC P-D FA 50mm f/2.8 Macro [S]ave
| Attribute |  Pentax SMC P-D FA 50mm f/2.8 Macro × |  Nikon 40mm ƒ/2.8G AF-S DX Micro Nikkor × |
|---|---|---|
| Closest Focus (m) | 0.2 | 0.16 |
| Magnification Ratio (x) | 1 | 1 |
| Length (mm) | 60 | 64.5 |
| Focus Details | - | AF-S (Silent Wave Motor) with M/A - M Mode Switch; Close Range Correction (CRC) |
| Diagonal Angle of View (degree) | 47.00 | 38.80 |
| Diaphragm Blades | 8 | 7 |
| Image Circle | 35mm | APS-C |
| Aperture (f) | 2.80 - 32.00 | 2.80 - 22.00 |
| Name | Pentax SMC P-D FA 50mm f/2.8 Macro | Nikon 40mm ƒ/2.8G AF-S DX Micro Nikkor |
| Brand | Pentax | Nikon |
| Weight (g) | 265 | 235 |
| Type | Standard Prime Macro | Telephoto Prime Macro |
| Lens Construction | 8 elements in 7 groups | 9 elements in 7 groups |
| Filter Size (mm) | 49 | 52 |
| Focal Length (mm) | 50.00 | 40.00 |
| Notes | - | Included Accessories: Bayonet Hood HB-61, Flexible Lens Pouch CL-0915 |
| APS Equivalent | 75mm | 60mm |
| Diaphragm Blades Type | - | rounded |
| Diameter (mm) | 67.5 | 68.5 |
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