Magus Bio DH260 Biological Digital Microscope (83481)

This is a research-grade microscope designed for observing transparent and translucent biological specimens—including smears and cross-sections—in transmitted light using the brightfield method. By adding optional accessories, the microscope can also support darkfield, phase contrast, fluorescence, and polarization techniques.

A key feature is the coded revolving nosepiece, which keeps brightness comfortable when switching objectives. Intelligent lighting control improves workflow speed and user comfort by reducing the need for constant manual adjustments, allowing the researcher to stay focused on the task.

Microscope head

The microscope is equipped with a trinocular head and infinity-corrected optics. The eyepiece tubes rotate 360°, allowing the user to adjust viewing height for a comfortable posture. A digital camera mounts into the trinocular tube, and light is split 50/50 between the camera and eyepieces.

The standard kit includes 10×/22 mm eyepieces with diopter adjustment and long eye relief, suitable for users who wear glasses.

Revolving nosepiece and objectives

The coded five-position revolving nosepiece is oriented inward, making it easy to see which objective is in the optical path while keeping the space above the stage clear. One slot remains available for an additional objective to extend magnification options. The parfocal height is 60 mm.

A dedicated slot with a plug is located above the nosepiece for inserting an analyzer when polarization accessories are used.

Comfortable brightness when changing magnification

Objectives transmit different light levels, so brightness typically must be adjusted with every objective change. Brightness can also rise sharply when switching from higher to lower magnification, which contributes to eye fatigue.

This microscope includes an intelligent brightness control system that automatically selects the optimal illumination level for each objective. As a result, sudden brightness changes are minimized, eye strain is reduced, and routine magnification changes become faster and more consistent.

Focusing mechanism

Because fine focusing is used frequently during routine work, the microscope is built with a smooth, responsive focusing system to reduce wrist fatigue. The fine focus knob includes finger grooves for secure, comfortable control, making precise adjustments easy during extended sessions.

Coarse and fine focus knobs are coaxial and positioned low on the body so the user can rest hands on the table. A coarse focus lock on the left helps quickly stabilize focus after changing specimens. Coarse focus tension is adjusted using a dedicated ring on the right, allowing the user to set a preferred resistance.

Stage

For improved ergonomics, the stage design does not include an X-axis positioning rack. A belt-driven mechanism provides smooth specimen movement. The specimen holder is secured with two screws and can be removed easily for manual scanning. A long stage control handle supports comfortable operation with the hand resting on the table.

Condenser

The Abbe condenser is height-adjustable and centerable, using a dovetail mount. The condenser ring controls the iris aperture diaphragm. The condenser body includes aperture markings, and the ring has an index marker. For best contrast, the user aligns the index marker with the aperture marking that corresponds to the objective in use.

Illumination

The transmitted-light illuminator uses a 3 W LED. In addition to brightness control, the microscope allows color temperature adjustment from 3000 to 7000 K, letting the user choose lighting that is comfortable for the eyes and switch quickly when the specimen requires a different illumination tone. The LED is rated for 50,000 hours of operation.

Köhler illumination in transmitted light

The light source is located in the base at the rear of the microscope, and illumination is directed to the collector via a mirror. Contrast is controlled through the condenser aperture diaphragm, and the illuminated field is regulated using the collector field diaphragm.

Köhler illumination improves image quality by enabling maximum objective resolution, providing even illumination across the field of view, preventing edge darkening, and minimizing image artifacts.

LCD status display

An LCD screen on the base shows objective magnification, brightness, and the selected color temperature, as well as operating modes such as eco and sleep. Using the screen and control knob, the user can adjust brightness, select color temperature, lock brightness settings, and configure the sleep mode and auto-off timer.

Ergonomic design

Ergonomics are a central part of the design to reduce fatigue and maintain productivity. By rotating the microscope head, the user can choose a comfortable viewing height to reduce strain on the neck and back. Low-positioned focusing knobs minimize hand strain, and the stage control handle and fine focus knob are placed within the same working zone to reduce unnecessary hand movement.

A dedicated carrying handle is included. The power adapter and cord are stored in a concealed arrangement, improving safety, workplace organization, and ease of transport and storage.

Accessories

A wide range of compatible accessories is available. Optional objectives and eyepieces extend magnification options. Phase contrast, reflected-light illumination, darkfield condensers, and polarization components expand contrast techniques and enable observation of structures that may be difficult to see in brightfield. A digital camera can display images on a monitor, store files, and support real-time measurement through software. Calibration slides support accurate measurement and can be used with scaled eyepieces or camera software.

Key features

• Brightfield observation of transparent and translucent specimens in transmitted light

• Trinocular head with vertical camera tube and height-adjustable viewing via 360° rotating eyepiece tubes; 50/50 beam splitting

• Coded five-position nosepiece with automatic brightness adjustment for each objective

• Energy-saving 3 W LED with up to 50,000 hours of service life

• Transmitted-light Köhler illumination with centerable, height-adjustable condenser and objective aperture markings

• Smart lighting system with automatic brightness, dimming lock, auto-off timer, and LCD status display

• Stage without X-axis positioning rack and with a long control handle for comfortable operation

• Ergonomic stand with carrying handle and concealed power adapter and cord

• Wide compatibility with optional accessories

The kit includes

• Stand with built-in power supply, transmitted light source, focusing mechanism, stage, condenser mount, and revolving nosepiece

• Abbe condenser

• Trinocular head

• Plan achromatic infinity-corrected objectives, parfocal height 60 mm:

  • 4×/0.10

  • 10×/0.25

  • 40×/0.65

  • 100×/1.25 oil (spring-loaded)

• Two 10×/22 mm eyepieces with long eye relief and diopter adjustment

• Eyecups

• C-mount camera adapter

• Power adapter and power cord

• Dust cover

• User manual and warranty card

Available on request

• 10×/22 mm eyepiece with scale

• 10×/22 mm eyepiece with reticle

• 10×/22 mm eyepiece with crosshairs

• Eyepiece pairs: 12.5×/17.5 mm, 15×/16 mm, 20×/12 mm

• Optional objective: 20×/0.40 (parfocal height 60 mm)

• Phase contrast device set (phase contrast condenser, centering telescope, phase objectives)

• Darkfield condenser NA 0.7–0.9

• Darkfield immersion condenser NA 1.3–1.26

• Reflected-light illuminator

• Polarization device

• Digital camera

• Calibration slide

• Monitor

Specifications

• Product ID: 83481

• Brand: MAGUS

• Warranty: 5 years

• EAN: 5905555019475

• Package size: 76 × 48 × 51 cm

• Shipping weight: 17.8 kg

• Type: biological, light/optical

• Head type: trinocular, Gemel head (Siedentopf, 360° rotation), 50/50 light distribution

• Head inclination: 30°

• Magnification range: 40×–1000×

• Optional magnification range: 40×–2000×

• Eyepiece tube diameter: 30 mm

• Eyepieces: 10×/22 mm, long eye relief (optional variants available)

• Objectives: plan achromatic, infinity-corrected; parfocal height 60 mm (optional 20×/0.40)

• Revolving nosepiece: 5-position, coded

• Working distances: 30 mm (4×), 10.2 mm (10×), 1.5 mm (40×), 0.2 mm (100×)

• Interpupillary distance: 47–78 mm

• Stage: 235 × 150 mm; travel 78 / 54 mm; two-axis mechanical, no positioning rack

• Diopter adjustment: ±5 D on each eyepiece

• Condenser: Abbe, NA 0.9, centerable and height-adjustable, adjustable diaphragm, dovetail mount

• Focus: coaxial coarse (with lock and tension adjustment) and fine focus, 0.001 mm resolution

• Illumination: LED, brightness adjustable

• Power supply: 100–240 V, 50/60 Hz; AC/DC adapter stored in a socket on the back of the stand

• Light source: 3 W LED with adjustable color temperature (3000–7000 K)

• Operating temperature: +5 °C to +35 °C

• Additional features: automatic brightness adjustment, eco mode, sleep mode, LCD status display

• Supported add-ons: darkfield (dry or oil), phase contrast (condenser and objectives), polarization components, reflected-light illuminator

• Intended users: experienced users and professionals

• Application: laboratory and medical

• Standard method: brightfield

• Supplied protective accessory: dust cover