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Stemi 305

ZEISS Stemi 305 Microscope with Greenough Stereo Optics for 5:1 Zoom Ratio ideal for Teaching, Industry and Research.

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Manufacturer PDF

Microscope Description

ZEISS Stemi 305 Stereo Microscope offers a compact 5:1 zoom ratio ideal for reflected light and transmitted light microscopy.

Stereo Microscope with 5:1 zoom ratio
Options for reflected light and transmitted light built into the stand or standalone
Greenough stereoscopic design for 3D impression depth information, ideal for dissection, inspection and documentation

Stand Options for Stemi 305

Stemi 305 stereo microscopes offer 3 main stands for different applications:

Stand K EDU – Ideal stand for education offering a streamlined setup that is compact for universities & colleges
- Compact
- Reflected light via stand only
- Transmitted light base for bright field and darkfield
- Options for polarization
- Carrying handle
Stand K LAB – Ideal stand for routine laboratory work involving a stereo microscope with a transmitted light unit fitted into the stand that can be controlled in intensity
- Integrated transmitted light and reflected light into the stand with a double gooseneck
- Tiltable mirror base for bright field, darkfield and oblique illumination
Stand K MAT – Ideal for material applications with electrostatic protected areas
- Reflected light vertical illumination
- LED segmentable right light

Zeiss Stereo Microscope Models of Stands — STEMI 305 Stereo Options

Binocular & Front Optics Options for Stemi 305

The Stemi 305 can be combined with binoculars for a different variety of applications:

Standard microscope body – features a dual eyepiece binocular with 25x/10 and 16x/14 eyepieces with optional reticules and eyecups
Stemi 305 cam – Features an integrated camera at 1.2 megapixels into the trinocular head which can be accessed using labscope iPad application. The WiFi camera offers a solution for documenting images and sharing.
Stemi 305 trino – Add an external camera from any manufacturer or the Axio Cam series at 2/3” with 50/50 division on the left.
Optics - Optional front optics with 0.5x FWD 185mm, 0.75x 128mm, 1.5x FWD 56mm, 2.0x 43mm

Options and Upgrades for Stemi 305

Stemi 305 microscopes can be combined with a variety of addons for a range of applications these include:

Stages – Mechanical, gliding, ball and socket and polarizing stages for a range of samples and precision as required
Stands – Beyond the main categories of stands a range of accessible boom stands, suspension arm stands are available for applications requiring flexible optical movements.
Illumination – Added accessories for illumination including external ring illumination, double spot LEDs, diffused lights and more controllable via the CL1500 HAL and CL4500 LED.

Illuminator Options for Stemi 305 — External Illumination Options for Stemi 305

Stage options and stand options for Stemi 305 — Stand and Stage Options for Stemi 305

Specifications

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