Stemi 305 is your compact stereo microscope with a 5:1 zoom – equally at home in the biology classroom, research lab or on the industrial shop floor. Choose between predefined microscope sets to get the optimal illumination equipment or your applications. Stemi 305 lets you observe samples as they really are: three-dimensional and crisp in contrast – no preparation needed. Enjoy all the advantages of an easy-to-use microscope with integrated LED illumination for reflected and transmitted light – plus fast, easy-to-use documentation. Just snap your images with the integrated 1.2 Megapixel Wi-Fi camera and share them using Labscope, the iPad imaging app. Or choose the conventional phototube for access to all ZEISS Axiocam cameras and free ZEN lite imaging software. This Greenough microscope will give you crisp 3D impressions, versatile object illumination and easily acquired images to share, whenever you want.

Technical Specification

Overall
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 in contrast
Parfocality of Zoom Optics	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	Integrated in each Stemi 305 microscope body, 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
Documentation Features Stemi 305 cam	Integrated 1.2 Megapixel Wi-Fi camera, wireless transmission of image signal*
Interfaces	(*Please ask your local contact for approval in your country.)
Front Optics and Polarization Analyzer	M52
Eyepieces	d = 30 mm
Stemi Mounts	d = 76 mm
Illuminators	d = 66 mm
Each Microscope Body incl. Eyepieces 10×/23 Br. Foc and Spiral Cable RJ12

 

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, Separate Versions
Stand K mechanical stand without electronics with 2× M8 interface for supporting arms of fiberoptic light guides
Stand K MAT with reflected light LED electronics and ESD features (antistatic surface resistance)
Stand K EDU with reflected/transmitted light LED electronics and built-in flat transillumination unit (brightfield/darkfield)
Stand K LAB with reflected/transmitted light LED electronics and built-in mirror transillumination unit (brightfield/darkfield/oblique)
Electronic Features of Stand K EDU/LAB/MAT	Separate control knobs for reflected/transmitted light (on/off/dimming)
2 sockets to adapt Stemi 305 bodies (integrated vertical illumination, Wi-Fi camera) and a second reflected light illuminator K
Separate control of vertical/second RL illumination by pushing the reflected light dimming knob (A ¦ B ¦ mixed light A+B ¦ Off ¦ …)
Integrated Power Unit, Easily Changeable	12 V DC 24 W / 100 … 240 V AC / 50 … 60 Hz
Optical Specifications K LED Illuminations (For Stands K EDU/MAT/LAB)
Color Temperature	Typ. 5600 K
Lifetime (Lumen Maintenance)	Typ. 25000 h (operation time until the light intensity degraded to 70% of initial value)
Integrated near Vertical LED Illumination	Brightness max. typ. 20000 lx (Stemi 305 focused)
LED Spot K, Height Adjustable, Zoomable	Brightness max. typ. 30000 lx (object field center, LED spot mounted to stand K)
LED Double Spot with Goosenecks, Self Carrying	Brightness max. typ. 90000 lx (object field center, double spot mounted to stand K)
Segmentable Ringlight K	Brightness max. typ. 55000 lx (mounted to Stemi 305 body, object focused)
Working distance 50 mm – 300 mm (also suitable for front optics 2.0×, when shifted upwards)
Built-in Transmitted Light LED Illuminations:
Flat transillumination unit (stand K EDU)	Brightness max. typ. 20000 lx (brightfield)
Mirror transillumination unit (stand K LAB)	Variable contrasting by rotatable and slidable mirror, brightness max 25000 lx

Stands N
Large Stand Base	W440 × D370
Column Height/Diameter	350 or 450 mm/d = 32 mm
Interface for Stages	d = 84 mm
Incl. Black/White Plate D = 84 and Security Ring
Additionally Needed: Stemi Mount for Column 32 with Drive
Stages for Interface d = 84 mm
Gliding stage ±20 mm, rotatable, d = 84 mm
Ball-and-socket stage ±30°, rotatable, d = 84 mm
Rotating polarization stage for stereo microscopes, with interfaces for polarizer and lambda plate
Boom Stands
Single Arm Boom Stand A
Stand Base Dimensions/Weight		W260 × D260 × H20; 13 kg
Boom Length/Diameter		600 mm/d = 37 mm
Working Radius (Incl. Stemi Mount)		Max. 615 mm
Tilting or Non-tilting Head, Height/Diameter		200 mm/d = 32 mm
Double Arm Boom Stand SDA
Stand Base Dimensions/Weight		W350 × D350 × H50; 31 kg
Double Arm Boom Stand, Ball-bearing, Length		670 mm
Working Radius (Incl. Stemi Mount)		Max. 695 mm
Tilting Head Integrated, Column Height/Diameter		200 mm/ d = 32 mm
Tilting Arm Stand U with Articulated Suspension Arm l
Arm Length / Lifting Range / Load Capacity		580 mm / 500 mm / 2 – 4,8 kg
Working Radius (Incl. Stemi Mount)		735 mm, 1060 mm with traverse S (option)
Table Clamp For Tables Thickness		5 – 75 mm
Stand Head Length/Diameter		100 mm/d = 32 mm
Additionally needed for all boom stands: Stemi mount for column 32 with drive or Stemi mount 0 – 90° without drive

Fiberoptic Illuminations
Cold Light Source CL 4500 LED CRI90 with High Power LED Engine
Light flux at 9 mm fiber output dia.	Typ. 450 lm
Color Temperature	Typ. 5400 K
Color Rendering Index	>90
LED Lifetime (Lumen Maintenance)	50000 h
Light Guide Sensor	Auto on/off
2 Position Filter Slider	2 filters and free opening
Wide-range Supply	Max. 50 W
Flicker free light, silent axial fan, 2.5 mm phone socket for foot button S
Cold Light Source CL 1500 HAL with 150 W Halogen Reflector Lamp
Light Flux at 9 mm Optical Output Diameter	Up to 600 lm
LCD Display	Brightness/color temperature/power-on hours
Bulb Lifetime at 80% Dimming (450 lm)	Typ. 150 h
Filter Slider	One filter d=28 mm and free opening
Wide-range supply for flicker free light, silent axial fan
Light Guides
One- And Two Branch Flexible Arm Spot Light Guides Additional supporting arms needed	Oblique light, crisp 3D impression by distinct shadows
One- and Two Branch Gooseneck Spot Light Guides	Oblique light, self-carrying, crisp 3D impression by distinct shadows
Annular Ring Illuminators d = 66 mm for Brightfield	Shadow free illumination
Annular Ring Illuminators d = 66 mm for Darkfield	Shadow free illumination
Line Light 50 mm	For homogeneous grazing light
Vertical Illuminator	For illumination of deepenings
Diffusor S	Shadow free all sided soft light, „cloudy day illuminator“, avoiding glare
Diffuse Area Light	One sided „soft“ illumination, avoiding glare but creating certain shadows
Illumination Accessories
Focusing Optics for Spot Light Guides	Increasing brightness
Polarizing Equipment for Spots and Ringlights	Reducing reflections

Fiberoptic Illuminations
Cold Light Source CL 4500 LED CRI90 with High Power LED Engine
Light flux at 9 mm fiber output dia.	Typ. 450 lm
Color Temperature	Typ. 5400 K
Color Rendering Index	>90
LED Lifetime (Lumen Maintenance)	50000 h
Light Guide Sensor	Auto on/off
2 Position Filter Slider	2 filters and free opening
Wide-range Supply	Max. 50 W
Flicker free light, silent axial fan, 2.5 mm phone socket for foot button S
Cold Light Source CL 1500 HAL with 150 W Halogen Reflector Lamp
Light Flux at 9 mm Optical Output Diameter	Up to 600 lm
LCD Display	Brightness/color temperature/power-on hours
Bulb Lifetime at 80% Dimming (450 lm)	Typ. 150 h
Filter Slider	One filter d=28 mm and free opening
Wide-range supply for flicker free light, silent axial fan
Light Guides
One- And Two Branch Flexible Arm Spot Light Guides Additional supporting arms needed	Oblique light, crisp 3D impression by distinct shadows
One- and Two Branch Gooseneck Spot Light Guides	Oblique light, self-carrying, crisp 3D impression by distinct shadows
Annular Ring Illuminators d = 66 mm for Brightfield	Shadow free illumination
Annular Ring Illuminators d = 66 mm for Darkfield	Shadow free illumination
Line Light 50 mm	For homogeneous grazing light
Vertical Illuminator	For illumination of deepenings
Diffusor S	Shadow free all sided soft light, „cloudy day illuminator“, avoiding glare
Diffuse Area Light	One sided „soft“ illumination, avoiding glare but creating certain shadows
Illumination Accessories
Focusing Optics for Spot Light Guides	Increasing brightness
Polarizing Equipment for Spots and Ringlights	Reducing reflections

Ambient Conditions
Storage (in Packaging)
Permissible Ambient Temperature	+10 to +40 °C
Permissible Humidity	Max. 75 % to +35 °C (without condensation)
Transportation (in Packaging)
Permissible Ambient Temperature	-40 to +70 °C
Operation
Permissible Ambient Temperature	+10 to +40 °C
Permissible Humidity	Max. 75 %
Air Pressure	800 hPa to 1060 hPa
Degree of Pollution	2
Area of Use	Closed spaces
Max. Altitude	Max. 2000 m
Operational Data – Power Supply, Microscope, Controller K LED
Protection Class	II
Protection Type	IP 20
Electrical Safety	Acc. to DIN EN 61010-1 (IEC 61010-1) allowing for CSA and UL specification
Degree of Pollution	2
Overvoltage Category	2
Power Supply	100 to 240 V ±10 %
Converting the line voltage is not necessary!
Power Frequency	50 Hz − 60 Hz
Power Consumption: Stage Power Supply with Microscope	Max. 40 VA
Output Power Supply Microscope and Controller K LED	12 V DC, max. 2 A
Input Output Power Supply Microscope and Controller K LED	100 − 240 V, 50 − 60 Hz, max. 0.55 A