Attribute | Sony SAL-28F28 28mm f/2.8 × | Pentax SMC P-DA 21mm f/3.2 AL Limited × |
---|---|---|
Notes | Built-in Hood | Dual filter attachment design: 43mm filters on the hood, and 49mm filters on the lens (without use of the hood). |
Magnification Ratio (x) | 0.13 | 0.17 |
Filter Size (mm) | 49 | 43 |
Focus Details | - | "Quick Shift" AF/MF mechanism |
Closest Focus (m) | 0.3 | 0.2 |
Lens Construction | 5 elements in 5 groups | 8 elements in 5 groups, including 1 hybrid aspherical element |
Length (mm) | 43 | 25 |
Focal Length (mm) | 28.00 | 21.00 |
APS Equivalent | 42mm | 31.5mm |
Brand | Sony | Pentax |
Image Circle | 35mm | APS-C |
Name | Sony SAL-28F28 28mm f/2.8 | Pentax SMC P-DA 21mm f/3.2 AL Limited |
Weight (g) | 184 | 140 |
Type | Wide Prime | Wide Prime |
Aperture (f) | 2.80 - 22.00 | 3.20 - 22.00 |
Diaphragm Blades | 7 | 7 |
Diagonal Angle of View (degree) | 75.00 | 68.00 |
Diameter (mm) | 71 | 63 |