The Fein Optic iRB20 inverted biological microscope was designed for working with samples in a liquid medium. The condenser is equipped with a 3-position phase slider with 10x Phase, 20x/40x Phase and Brightfield. Long working distance objectives are designed to image through Petri dishes and culture flasks. The phase contrast allows you to view live cells easily.
Specifications
| Optical System | Infinity Color Corrected Optical System |
| Viewing Head | 45° inclined siedentopf trinocular head. Interpupillary distance adjustable 48~76mm, diopter adjustable. |
| Eyepieces | WF10x widefield, high eyepoint plan eyepieces, FN23. Reticle retaining ring for 26mm diameter reticle. |
| Objectives | Infinity Corrected LWD Plan Achromat 4x, NA 0.11. |
| Infinity Corrected LWD Plan Achromat Phase Contrast 10x, NA 0.25, WD = 4.3mm. | |
| Infinity Corrected LWD Plan Achromat Phase Contrast 20x, NA 0.40, WD = 8mm. | |
| Infinity Corrected LWD Plan Achromat Phase Contrast 40x, NA 0.60, WD = 3.5mm. | |
| Nosepiece | Revolving Quintuple Nosepiece. |
| Focus Adjustment | Low-position coaxial focusing system with tension adjustment, coarse focusing range 9mm. Fine adjustment precision of 0.002mm. |
| Body | External power supply, select 110~240V. |
| Stage | Fixed stage 227mm x 208mm. Mechanical stage available with 114mm (X) x 77mm (Y) travel with holder for slide, 55mm Ø petri dish holder. |
| Condenser | Extra long working distance condenser, WD = 55mm, NA 0.3, with iris diaphragm and slot for phase slider. |
| Illumination | LED illumination. |
| Phase Contrast Slider | Phase contrast slider for 10x, 20x/40x phase and brightfield observation. |
| Centering Telescope | Includes phase centering telescope. |
| C-Mount Adapter | Focusing 0.5x c-mount adapter. |
| Reticles | Variety of cross-line, ruler and grid reticles available in 26mm diameter. |
