| Lens Specifications | |
|---|---|
| Name | 21mm ƒ/2.8 Biogon T* 2,8/21 ZM |
| Image Circle | 35mm |
| Type | Wide Prime |
| Focal Length | 21mm |
| APS Equivalent | 32mm |
| Max Aperture | ƒ/2.8 |
| Min Aperture | ƒ/22 |
| Diaphragm Blades | 10 |
| Lens Construction | 9 elements in 7 groups |
| Diagonal Angle of View(Based on image circle) | 90 degrees |
| Focus Details | Manual focus |
| Front Element Rotation | No |
| Zoom System | n/a |
| Closest Focus | 0.5m / 19.6 in. |
| Magnification Ratio | 0.047x / 1:21 |
| Filter Size | 46mm |
| Dimensions(Length x Diameter) | 75mm x 53mm / 2.95 in. x 2.09 in. |
| Weight | 280g / 9.9 oz |
| Notes | Zeiss Ikon (ZM) mount |
| Typical Online Price | US$1,340 |
