Type of Microscope: Stereo microscope, Greenough design
Design Principle: Two zoom systems, tilted by the stereo angle
Stereoscopic View: Three-dimensional observation through eyepieces
Optical Data (Basic System, Eyepieces 10×, No Front Optics)
Magnification Range: 8× – 40×
Free Working Distance: 110 mm
Maximum Resolution: 200 Lp/mm – 2.5 µm
Maximum Object Field Diameter: 29 mm
Optical Data with Interchangeable Optics (Eyepieces, Front Optics)
Accessible Magnification Range: 4× – 200×
Free Working Distances: 43 – 185 mm
Maximum Resolution: 400 Lp/mm – 1.25 μm
Maximum Object Field Diameter: 58 mm
Microscope Bodies
Manual Zoom, Zoom Range 5:1 (0.8× - 4.0×)
Quality of Zoom Optics: Low distortion, crisp contrast
Parfocality: Object remains focused while zooming
Viewing Angle: 45°
Adjustment of Interocular Distance: 55 - 75 mm
Zoom Click Stops: Five positions (0.8×, 1×, 2×, 3×, 4×)
Maximum Field Number: 23 mm
Integrated Near Vertical LED Illumination: Built-in, powered by stands H EDU/LAB/MAT or controller K LED, illumination angle 10° towards optical axis
Documentation Features
Stemi 305 trino: Photoport with 50/50 split to the left, integrated camera adapter 0.5×, c-mount interface
Stemi 305 cam: Integrated 1.2 MP Wi-Fi camera, wireless transmission of image signal
Interfaces
Front Optics and Polarization Analyzer: M52
Eyepieces: d = 30 mm
Stemi Mounts: d = 76 mm
Illuminators: d = 66 mm
Each Microscope Body includes Eyepieces 10×/23 Br. Foc and Spiral Cable RJ12
Technical Specifications – Compact Stand System K
Stand Base: W190 × D310 × H35 mm (K LAB: H90 mm)
Working Surface: W160 × D195 mm
Column with Stemi Mount, Handle and Focus Drive, Friction Adjustable
Height: 250 mm
Lifting Range: 145 mm
Interface to Microscope: d = 76 mm
Interfaces for Stages: d = 84 mm
Interface for TL Polarizer: d = 45 mm
Interface for LED Spot K and Double Spot K: Slot in focus drive
Incl. Glass Plate or Black/White Plate D = 84 × 5 mm, Dust Cover
Stands K (Versions)
Stand K: Mechanical stand without electronics, with 2× M8 interface for fiberoptic light guides
Stand K MAT: Reflected light LED electronics and ESD features (antistatic)
Stand K EDU: Reflected/transmitted light LED electronics and flat transillumination (brightfield/darkfield)
Stand K LAB: Reflected/transmitted light LED electronics and mirror transillumination (brightfield/darkfield/oblique)
Electronic Features (Stands K EDU/LAB/MAT)
Separate control knobs for reflected/transmitted light (on/off/dimming)
2 sockets for Stemi 305 bodies (with vertical illumination/Wi-Fi camera) and second reflected light illuminator K
Separate control of vertical/second RL illumination (A → B → mixed A+B → Off)
Integrated Power Unit: 12 V DC 24 W / 100–240 V AC / 50–60 Hz
Optical Specifications – K LED Illuminations
Color Temperature: Typ. 5600 K
Lifetime: Typ. 25,000 h
Integrated Vertical LED Illumination Brightness: Max. 20,000 lx
LED Spot K (height adjustable, zoomable): Max. 30,000 lx
LED Double Spot with Goosenecks: Max. 90,000 lx
Segmentable Ringlight K: Max. 55,000 lx, working distance 50–300 mm
Flat Transillumination (K EDU): Max. 20,000 lx (brightfield)
Mirror Transillumination (K LAB): Variable contrast, max. 25,000 lx
Technical Specifications – Stands N
Stand Base: W440 × D370 mm
Column Height/Diameter: 350 or 450 mm / d = 32 mm
Interface for Stages: d = 84 mm
Incl. Black/White Plate D = 84 mm and Security Ring
Requires Stemi Mount for Column 32 with Drive
Stages (d = 84 mm)
Gliding stage: ±20 mm, rotatable
Ball-and-socket stage: ±30°, rotatable
Rotating polarization stage: With polarizer and lambda plate interfaces
Boom Stands
Single Arm Boom Stand A: Base W260 × D260 × H20 mm; 13 kg, boom length 600 mm, working radius 615 mm
Double Arm Boom Stand SDA: Base W350 × D350 × H50 mm; 31 kg, boom length 670 mm, working radius 695 mm
Tilting Arm Stand U: Arm length 580 mm, lifting range 500 mm, load capacity 2–4.8 kg, working radius up to 1060 mm with traverse S, table clamp 5–75 mm
(All require Stemi mount for column 32 with drive, or Stemi mount 0–90° without drive)
Fiberoptic Illuminations
Cold Light Source CL 4500 LED: 450 lm output, 5400 K, CRI >90, lifetime 50,000 h, auto on/off sensor
Cold Light Source CL 1500 HAL: 150 W halogen lamp, 600 lm, lifetime 150 h (80% dimming), LCD display, filter slot
Light Guides & Accessories
One- and two-branch flexible arm guides (oblique light, crisp 3D)
Gooseneck guides (self-carrying, oblique light)
Annular ring illuminators (brightfield or darkfield)
Line light 50 mm (homogeneous grazing light)
Vertical illuminator, diffusor S (“cloudy day”), diffuse area light
Accessories: Focusing optics, polarizing equipment
Ambient Conditions
Storage (packaged): +10 to +40 °C, max 75% humidity (to +35 °C, no condensation)
Transport (packaged): -40 to +70 °C
Operation: +10 to +40 °C, max 75% humidity, air pressure 800–1060 hPa, altitude up to 2000 m, closed spaces
Operational Data – Power Supply (Microscope & Controller K LED)
Protection Class: II
Protection Type: IP 20
Standards: DIN EN 61010-1 (IEC 61010-1), CSA, UL
Overvoltage Category: 2
Power Supply: 100–240 V ±10 %, 50–60 Hz
Power Consumption: Max. 40 VA
Output: 12 V DC, max. 2 A
