SPECIFICATIONS
| Model | RT-A-2828MT |
| Focal Length | 28 mm |
| Image Circle | 43.0 mm |
| Optical Format | 35mm Full Frame |
| Working Distance Rance | 300 mm – infinity |
| F-number Range | f/2.8 ~ f/22 |
| Back Focal Distance | 35.7 mm |
| Maximum Distortion | 3.0 % |
MECHANICAL
| Camera mount | M42 x 1 (T-Mount) |
| Filter Thread | M52 x 0.75 |
| Focus Control | Manual with locking screw |
| Aperture Control | Manual with locking screw |
| Lens Diameter | 60.0 mm |
| Lens Length | 34.2 mm |
| Lens Mass | 170 g |
