| Electrical | Light Source | |||
|---|---|---|---|---|
| 240 Volt operation | 22 Watt circular fluorescent lamp | |||
| 50Hz | Output 1000 Lumens | |||
| 71 inch ( 1800mm) cable length | ||||
| Integral ballast mounted on back arm | ||||
| Lens selection | ||||
| Image size relative to actual size of object viewed | 1.75X (175%) |
2.75 ( 275%) |
3.75X (375%) |
4.75 ( 475%) |
| 3 | 7 | 11 | 15 | |
| Focal length | 13" | 5.5" | 3.5" | 2.625" |
| (Object to lens) | 330mm | 140mm | 90mm | 66mm |
| Lens combination: Primary | 3d | 3d | 3d | 3d |
| Secondary | 4d | 8d | 15d | |
