The SJM45 is a gemology configuration: a 0.67×–4.5× zoom body on a rotating base with three light sources — transmitted daylight for colour grading, a fibre-style spot for inclusions, and reflected halogen for surface features.
The base rotates 0–325° and the arm tilts 0–38°, so a stone can be examined from any angle without being re-clamped. A wire gem holder is included for loose stones.
| Viewing head | Trinocular, 45° inclined |
|---|---|
| Interpupillary | 52–76 mm, internal linkage |
| Eyepieces | WF10×/22 mm, diopter adjustable |
| Zoom range | 0.67×–4.5× continuous |
| Zoom ratio | 1:6.5 |
| Focus travel | 110 mm |
| Arm rotation | 0–38° |
| Base rotation | 0–325° |
| Aperture | 2–41 mm variable diaphragm |
| Illumination | 9 W daylight fluorescent, LED spot, 6 V 20 W halogen |
| Specimen holder | Wire gem holder, mountable on both sides of the stage |
Tell us the material and what you need to measure. We reply within one business day with a configuration and price.
