Specifications:
The B-157 model is an educational microscope designed for routine applications. It features a binocular observation head inclined at 30° and rotatable 360°, with diopter adjustment on the left eyepiece and interpupillary adjustment ranging from 48-75 mm. The microscope includes widefield eyepieces WF10X/18 and achromatic objectives (4X, 10X, 40X, 60X) treated with anti-fungus treatment. The objectives have a mechanical tube length of 160 mm and are mounted on a quadruple revolving nosepiece with ball bearings.

Illumination:
The light source is a white LED with a power of 1W and a color temperature of 6300K, offering an average lifetime of approximately 50,000 hours. Light intensity is controlled via a knob on the left side of the frame. The external power supply is 100/240Vac, 50/60Hz, with an output of 5Vdc 500mA.

Focusing and Stage:
The microscope includes a coaxial coarse and fine focusing mechanism with a graduated scale of 0.002mm and an upper stop to prevent contact between the objective and specimen. The stage is a double-layer mechanical sliding stage measuring 125x116mm, with an X-Y movement range of 76x30mm and a vernier scale accuracy of 0.1mm. It includes a specimen holder for one slide.

Condenser:
The Abbe condenser has a numerical aperture of 1.2 and is precentered.

Dimensions and Weight:
The microscope measures 350mm in height, 170mm in width, and 210mm in depth, with a weight of 4 kg.

Accessories:
An instruction manual and dust cover are included.

Additional Information:
The microscope is constructed with a die-cast frame for high stability and ergonomics, suitable for transmitted light observation. It is manufactured by OPTIKA Microscopes Italy.