| Item | BPM-300A(L) | BPM-300B(L) | BPM-300C(L) | BPM-300D(L) |
| Total Magnification | 100× | 50× | 40× | 20× |
| Mechanical Tube Length | 160mm | |||
| Eyepiece | 10× | |||
| Objective | 10× | 5× | 4× | 2× |
| Numerical Aperture | 0.25 | 0.12 | 0.1 | 0.05 |
| Diameter of Viewing field in Eyepiece | φ18mm | |||
| Eyepiece Reticle | 0.1mm | |||
| Fine Division | 0.01mm | 0.02mm | 0.025mm | 0.05mm |
| Working Distance | 6.93mm | 17.6mm | 18mm | 17.2mm |
| Focus Range | 30mm | |||
| Diameter of Bearing Plane | φ63mm | |||
| Height of Microscope | 210mm | |||
| Mass of Microscope | 650g | |||
| Illumination | Pen light, No.7 battery | |||
Eyepiece10× with reticle and diopter adjustment. Various of reticle for eyepiece to meet different requirements.
BPM-300 series portable measuring microscopes are mainly used for measuring or viewing purposes in production and laboratory area. They are particularly suitable for examination of machinery industry, paper making, printing and textile, etc. They are also suitable to be used by students for education.
| BPM-300A | BPM-300B | BPM-300C | BPM-300D | BPM-300 AL | BPM-300 BL | BPM-300 CL | BPM-300 DL | |
| Eyepiece10×/18 Cross with Reticle | ● | ● | ● | ● | ● | ● | ● | ● |
| Objective10× | ● | ● | ||||||
| Objective5× | ● | ● | ||||||
| Objective4× | ● | ● | ||||||
| Objective2× | ● | ● | ||||||
| Pen Light Illumination (with holder, No Battery) | ● | ● | ● | ● |