Lifetime Warranty See details
The price is valid only for the online store and may differ from the prices in retail stores.

Magnification: 40–1000x. Trinocular head, infinity plan achromatic objectives, 30W halogen bulb

The microscope head is a core element of the microscope that you look through to see a magnified sample
40–1000 basic configuration (*optional: 40–1200/1250/1500/1600/2000/2500)
How much the size of a sample increases when you observe it through a microscope
Application and use of the microscope

Product ID 82890
Warranty 5 years
EAN 5905555018010
Package size (LxWxH) 16.9x10.6x24.8 in
Shipping Weight 23.2 lb

The MAGUS Bio 250T biological microscope is a professional instrument for observing biological specimens in transmitted light. The primary observation technique is a brightfield technique (ready-to-use). Darkfield, polarization, and phase contrast techniques are also available, but they require additional microscope accessories. The microscope is excellent for laboratory and research observations in medicine, pharmaceuticals, forensics, agriculture, and other fields.


Plan achromatic objectives provide a clear, contrasty, and well-detailed image with minimal distortion. The magnification with included objectives and eyepieces ranges from 40 to 1000x, and the upper limit can be increased with additional eyepieces. The optics are infinity corrected, which means that additional accessories can be installed in the optical path.

The trinocular head has a separate vertical tube for mounting a digital camera (not included). It is positioned vertically. The trinocular head is equipped with 360° rotating tubes, and it is possible to adjust the diopter on the left tube. The design of the trinocular head allows you to easily adjust the eye relief to fit the height of the observer.

The revolving nosepiece with objectives is oriented toward the interior, and 5 objectives can be inserted into the revolver simultaneously – 4 objectives come with a kit, one slot is free. An additional objective will provide extra magnification within the magnification range.


A 30W halogen bulb provides bright illumination allowing for good visibility of sample structures with any observation technique and any objective being used. The lighting is warm, which is more comfortable for the eyes during long hours of work. There is a brightness adjustment option. The lighting is powered by an AC power supply.

It is possible to set up the Köhler illumination thanks to a centered and height-adjustable Abbe condenser, aperture diaphragm, and field diaphragm. There is a slot in the condenser where a darkfield or phase contrast slider can be installed. The slider allows you to quickly switch between research techniques and that which improves performance.

Stage and focusing mechanism

The stage does not have a positioning rack, which improves the ergonomics. The mechanical attachment moves the object smoothly and can be removed for manual scanning.

The focusing knobs are located on both sides of the microscope body and closer to the base of the microscope, which allows you to put your hands on the table instead of holding them in the air when working for long periods of time. The knobs are coaxial, i.e. they are located on the same axis. The coarse focusing mechanism has a lock knob and tension adjustment. The focusing mechanism is smooth, and so you do not have to exert any effort when adjusting it.


The line of optional accessories includes eyepieces, objectives, polarization devices, darkfield condensers, phase contrast devices, calibration slides, and digital cameras. Designed specifically for the MAGUS Bio 250T microscope, the devices match the microscope optimally and maximize its capabilities.

Key features:

  • Trinocular head with a vertical tube for mounting a digital camera
  • 360° rotating eyepiece tubes allow you to adjust it to fit the height of the user
  • Diopter adjustment on the left tube, coarse focusing with a lock knob and coarse tension adjustment knob, fine focusing
  • Observations in transmitted light, light source – 30W adjustable brightness halogen lamp
  • The Abbe condenser with aperture diaphragm and field diaphragm allows you to set up the Köhler illumination
  • Option to install phase contrast and darkfield sliders (there is a special slot in the condenser for their installation)
  • A wide range of optional accessories

The kit includes:

  • Base with a power input, transmitted light source, focusing mechanism, stage, condenser mount, and revolving nosepiece
  • Abbe condenser
  • Trinocular head
  • Infinity plan achromatic objective: 4x/0.10
  • Infinity plan achromatic objective: 10x/0.25
  • Infinity plan achromatic objective: 40x/0.65 (spring-loaded)
  • Infinity plan achromatic objective: 100x/1.25 oil (spring-loaded)
  • Eyepiece 10x/22mm with a long eye relief (2 pcs.)
  • Eyecup (2 pcs.)
  • Filter (4 pcs.)
  • C-mount camera adapter
  • Bottle of the immersion oil
  • AC power cord
  • Dust cover
  • User manual and warranty card

Available on request:

  • 10x/22mm eyepiece with scale
  • 12.5x/14mm eyepiece (2 pcs.)
  • 15x/15mm eyepiece (2 pcs.)
  • 20x/12mm eyepiece (2 pcs.)
  • 25x/9mm eyepiece (2 pcs.)
  • Infinity plan achromatic objective: 20x/0.40
  • Infinity plan achromatic objective: 60x/0.80 (spring-loaded)
  • Phase-contrast device
  • Phase slider
  • Darkfield condenser NA 0.9
  • Oil darkfield condenser NA 1.36–1.25
  • Darkfield slider
  • Polarization devices
  • Digital camera
  • Calibration slide
  • LCD Monitor
Product ID 82890
Warranty 5 years
EAN 5905555018010
Package size (LxWxH) 16.9x10.6x24.8 in
Shipping Weight 23.2 lb
Type biological, light/optical
Head trinocular
Nozzle Gemel head (Siedentopf, 360° rotation)
Head inclination angle 30 °
Magnification, x 40–1000 basic configuration (*optional: 40–1200/1250/1500/1600/2000/2500)
Eyepiece tube diameter, in 1.2
Eyepieces 10х/22mm, eye relief: 10mm (*optional: 10x/22mm with scale, 12.5x/14; 15x/15; 20x/12; 25x/9)
Objectives infinity plan achromatic: 4x/0.10; 10x/0.25; 40xs/0.65; 100xs/1.25 (oil); parfocal distance: 45mm (*optional: 20x/0.40; 60хs/0.80)
Revolving nosepiece for 5 objectives
Working distance, mm 21 (4x); 5 (10x); 0.66 (40xs); 0.36 (100xs); 8.8 (20x); 0.465 (60xs)
Interpupillary distance, in 1.9 — 3
Stage, mm 180x150
Stage moving range, mm 75/50
Stage features two-axis mechanical stage, without a positioning rack
Eyepiece diopter adjustment, diopters ±5 (on the left tube)
Condenser Abbe condenser, N.A. 1.25, center-adjustable, height-adjustable, adjustable aperture diaphragm, a slot for a darkfield slider and phase contrast slider, dovetail mount
Diaphragm adjustable aperture diaphragm, adjustable iris field diaphragm
Focus coaxial, coarse focusing (21mm, 39.8mm/circle, with a lock knob and tension adjusting knob) and fine focusing (0.002mm)
Illumination halogen
Brightness adjustment
Power supply 220±22V, 50Hz, AC network
Light source type 12V/30W halogen bulb, G4
Light filters yes
Operating temperature range, °F 41...+95
Ability to connect additional equipment phase contrast device (condenser and objectives), darkfield condenser (dry or oil), polarization devices (polarizer and analyzer)
User level experienced users, professionals
Assembly and installation difficulty level complicated
Application laboratory/medical
Illumination location lower
Research method bright field
Pouch/case/bag in set dust cover
Weight, lbs 17.6
Dimensions, in 200x436x400
Questions and Answers
Submit your question
Your name *
Email *
Your question/comment *