Overall Design
Type: Stereo microscope, Greenough design
Principle: Two zoom systems, tilted by stereo angle
View: True three-dimensional observation
Optics: Apochromatic corrected zoom and front optics, free of color fringes
Optical Data – Basic System (10× Eyepieces, No Front Optics)
Magnification range: 6.3× – 50×
Free working distance: 92 mm
Resolution: 225 Lp/mm (Rayleigh 4.4 µm; smallest 2.2 µm)
Max. object field: 36.8 mm
Optical Data – With Interchangeable Optics
Magnification range: 1.9× – 250×
Free working distances: 35 – 287 mm
Resolution: 450 Lp/mm (Rayleigh 2.2 µm; smallest 1.1 µm)
Max. object field: 122.7 mm
Microscope Bodies
Models: Stemi 508, Stemi 508 doc, Stemi 508 trino
Zoom range: 8:1 (0.63× – 5.0×), parfocal
Zoom optics: Distortion-free, high contrast, apochromatic
Viewing angle: 35°
Interocular distance: 55 – 75 mm
Zoom click stops: 10 positions, 0.63× – 5.0×
Max. field number: 23 mm
Documentation Features
Stemi 508 doc: Photoport, 100% switch (eye/camera), 60N c-mount adapter 0.5×
Stemi 508 trino: Photoport, 50/50 split (eye/camera), 60N c-mount adapter 0.5×
Interfaces
Front optics/dust protection: M50 × 0.75
Polarizer: M49 × 0.75
Eyepieces: Ø 30 mm
Stemi mounts: Ø 76 mm
Illuminators: Ø 53 mm (or Ø 66 mm via adapter)
Stand M (Large Desktop Stand)
Stand M: Mechanical, for external fiberoptic illumination
Stand M LED: Integrated electronics, transmitted/reflected LED illumination
Base: 300 × 340 × 35 mm; working surface 255 × 215 mm
Column: Height 360 mm; lifting range 190 mm; load capacity 5 kg
Interfaces: Stages Ø 84 mm, transillumination units, polarizer Ø 45 mm
Electronics: RJ12 sockets for reflected light LEDs, sliding contacts for transmitted light LEDs
Power: Integrated 12 V DC, 24 W, 100–240 V AC
Stand K (Compact System)
Stand K: Mechanical, external fiberoptic illumination
Stand K MAT: With controls for reflected LEDs, ESD features
Stand K EDU: With reflected LED control + flat transilluminator
Stand K LAB: With reflected LED control + mirror-based transillumination
Base: 200 × 310 × 35 mm (LAB: 90 mm high); working surface 160 × 195 mm
Column: Height 250 mm; lifting range 145 mm; load capacity 5 kg
Electronics: Control knobs for reflected/transmitted LEDs, integrated 12 V DC supply
LED Illumination Specs (Stands K/M)
Color temperature: 5600 K
Lifetime: ~25,000 h
LED Spot K: up to 30,000 lx
LED Double Spot K: up to 90,000 lx
Segmentable Ringlight K: up to 55,000 lx
Transilluminator BF/DF M: up to 20,000 lx
Mirror Transilluminator M: up to 25,000 lx
Stand N
Large base: 440 × 370 mm
Column: 450 mm height, Ø 32 mm
Includes: Black/white plate Ø 84 mm, safety ring
Compatible stages: Gliding, ball-and-socket, rotating pol stage
Boom & Suspension Stands
Single Arm Boom Stand B: Working radius 230–610 mm; vertical object height 0–385 mm; ~28 kg total weight
Double Arm Boom Stand SDA: Working radius 360–690 mm; object height up to 920 mm; ~57 kg total weight
Tilting Arm Stand U: Table-mounted; working radius up to 735 mm (with traverse up to 1060 mm); ~15 kg total weight
Floor Stand S: Mobile, lockable wheels; working radius up to 1255 mm; object height 830–1650 mm; ~90 kg total weight
Fiberoptic Illumination Options
CL 6000 LED: 600 lm, 6200 K (optional 5600 K or 3200 K filters), ~50,000 h lifetime
CL 1500 HAL: 150 W halogen, up to 600 lm, adjustable color temp, ~1500 h bulb life
Light guides: Single/double spot, gooseneck, annular brightfield/darkfield, line light, vertical illuminator
Accessories: Diffusers, polarizers, focusing optics
Ambient & Electrical Data
Storage temperature: +10 to +40 °C (transport –40 to +70 °C)
Operating temperature: +10 to +40 °C
Max. humidity: 75 % (non-condensing)
Altitude: up to 2000 m
Air pressure: 800 – 1060 hPa
Protection: Class II, IP20
Input voltage: 100 – 240 V (50/60 Hz)
Power: Max. 40 VA; output 12 V DC, max. 2 A
Compliance: CE, UL, FCC, PSE; DIN EN 61010-1
