Comparison of Olympus 45mm ƒ/1.8 M.Zuiko Digital ED and Pentax 50mm ƒ/1.8 SMC DA [S]ave
| Attribute |  Pentax 50mm ƒ/1.8 SMC DA × |  Olympus 45mm ƒ/1.8 M.Zuiko Digital ED × |
|---|---|---|
| Diagonal Angle of View (degree) | 31.50 | 27.00 |
| Aperture (f) | 1.80 - 22.00 | 1.80 - 22.00 |
| Diaphragm Blades Type | rounded | circular |
| Filter Size (mm) | 52 | 37 |
| Notes | - | Included Accessories: Lens Cap( LC-37B), Lens Rear Cap (LR-2), Decoration Ring (DR-40) |
| APS Equivalent | 76.5mm | - |
| Type | Tele Prime | Telephoto Prime |
| Diaphragm Blades | 7 | 7 |
| Lens Construction | 6 elements in 5 groups; Front surface has SP (Super Protect) coating | 9 Elements in 8 Groups; 2 E-HR lenses |
| Image Circle | APS-C | Image Circle |
| Focal Length (mm) | 50.00 | 45.00 |
| Brand | Pentax | Olympus |
| Name | Pentax 50mm ƒ/1.8 SMC DA | Olympus 45mm ƒ/1.8 M.Zuiko Digital ED |
| Weight (g) | 122 | 116 |
| Diameter (mm) | 63 | 56 |
| Length (mm) | 38.5 | 46 |
| 35mm Equivalent | - | 90mm |
| Magnification Ratio (x) | 0.15 | 0.11 |
| Focus Details | Quick-shift Focus System for instant switching from auto to manual focus | - |
| Closest Focus (m) | 0.45 | 0.5 |
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