The MAGUS Bio 250TL microscope studies thin sections and smears of biological samples. Observations are made using the brightfield microscopy technique in transmitted light. A 3-watt LED serves as the light source and the optics feature infinity plan achromatic objectives. The microscope supports additional accessories including darkfield polarization and phase contrast devices. This microscope is the ideal choice for laboratory analysis research and teaching.


The trinocular head includes two eyepiece tubes for observations and a vertical tube for mounting digital camera (not included). The tubes are 30° inclined for comfortable long working hours and can be rotated 360° to fit the height of the observer. There is a diopter adjustment ring that is located on the left tube.

Objectives are mounted in a 5-slot revolving nosepiece – four objectives are included one slot for an additional objective is left free. Any optional objective can be installed in the free slot allowing for additional magnification within the magnification range. The user can see the objective inserted into the optical path during the observation as the revolving nosepiece is oriented toward the interior. It keeps the space above the stage free.

The magnification range is from 40x to 1000x (only applies to the basic configuration). If you add additional objectives the upper magnification limit will be increased.


LEDs mounted at the bottom of the microscope provide bright and even illumination of the object. The color temperature remains the same when changing brightness. The power of the illumination is 3W. It has an operating life of 50 000 hours. The lighting system is powered by an AC power supply.

By adjusting the position of the Abbe condenser and opening or closing the aperture and field diaphragms it is possible to set up the Köhler illumination. You can use sliders for darkfield and phase contrast techniques (a special slot is provided in the condenser). With the slider switching between the research techniques is very fast.

Stage and focusing mechanism

The stage has no positioning rack. Therefore it will not disturb you during observations and the microscope itself will take up less space on the desktop. The mechanical attachment that moves the sample is removable (useful for manual scanning).

Coarse and fine focusing are used for focus adjustment. The knobs are located on both sides. As they are located closer to the base you do not have to hold your hands in the air while working. You can relax them on the table. The coarse focusing has a lock knob and tension adjustment. The focus adjustment is smooth and effortless.


The capabilities of the MAGUS Bio 250TL microscope can be enhanced with the line of accessories including eyepieces objectives calibration slides digital cameras darkfield polarization and phase contrast devices.

Key features:

  • Trinocular head revolving nosepiece for 5 objectives infinity plan achromatic optics
  • The eyepiece tubes rotate 360° for easy adjustment to fit the height of the observer
  • There is a diopter adjustment ring on the left tube coarse and fine focusing
  • The coarse focusing has a lock knob and tension adjustment
  • The Abbe condenser is centered and height-adjustable and the field and aperture diaphragms allow for the Köhler illumination setup
  • Transmitted light source – 3W LED with adjustable brightness powered by 220V power supply
  • Option to install additional accessories

The kit includes:

  • Base with a power input transmitted light source focusing mechanism stage condenser and revolving nosepiece
  • Trinocular head
  • Infinity plan achromatic objective: 4x/0.1
  • Infinity plan achromatic objective: 10x/0.25
  • Infinity plan achromatic objective: 40x/0.65 (spring-loaded)
  • Infinity plan achromatic objective: 100x/1.25 (spring-loaded)
  • Eyepieces 10x/22mm with a long eye relief (2 pcs.)
  • Eyecups (2 pcs.)
  • Filters (4 pcs.)
  • C-mount camera adapter
  • Bottle of the immersion oil
  • Hex key wrench
  • 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/0.4
  • 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 device
  • Digital camera
  • Calibration slide
Warranty years 5
EAN 5905555018058
Package size (LxWxH) cm 43.1x27.1x63
Shipping Weight kg 10.5
Type biological light/optical
Head trinocular
Head inclination angle 30 °
Magnification x 40–1000 basic configuration (*optional: 40–1200/1250/1500/1600/2000/2500)
Magnification range from 800x to 1280x
Eyepiece tube diameter mm 30
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/0.1; 10x/0.25; 40xs/0.65; 100xs/1.25 (oil); parfocal distance: 45mm (*optional: 20x/0.4; 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 mm 48 — 75
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 LED
Brightness adjustment yes
Power supply 220±22V 50Hz AC network
Light source type 3W LED
Light filters yes
Operating temperature range °C 5 — 35
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 kg 8
Dimensions mm 200x436x400
Nozzle Gemel head (Siedentopf 360° rotation)

Returns Policy

We have a 14-day return policy. If you are not satisfied with your purchase, please return it in its original packaging and be sure to put the original product packaging inside the shipping box to avoid any damage..

All items must be in their original condition and unused. The value of your purchase will be refunded. .

Shipping charges will not be refunded.

If the return is due to a defective product, you may be compensated for the return shipping.

Please contact us for more details if you need to make a return..


- From 0 to 2 kg - shipping cost: 12,50 euros.

- From 2.001 kg to 30 kg - shipping cost: 17,00 euros.

- From 30,001 kg - shipping cost: 30,00 euros.

In case of collection at our warehouse or resale points - the shipping is free.

Related Products