The OBT-1 series consists of high-quality school microscopes that stand out due to their user-friendly controls, robustness, and modern design. The continuously dimmable 1-W LED ensures optimal illumination of specimens and a long lifespan. Mobile use is also possible with the optional battery operation. The simple 0.65 condenser lens with adjustable aperture of the OBT 101 provides optimal light focusing and specimen illumination. Models OBT 102 to OBT 106 feature a height-adjustable and thus focusable 1.25 Abbe condenser with aperture, which ensures optimal light focusing. Focusing on the object is achieved for all models through dual coarse and fine adjustments. Quick operation and movement of the specimen is facilitated by a mechanical stage (for models OBT 103 to OBT 106). A wide selection of different eyepieces and objectives is also available. A dust cover and an operating manual are included in the delivery. Application area: primary school (elementary level) and secondary level, training, hobby. Applications/specimens: translucent and thin, high-contrast, low-demand specimens (e.g., plant tissues, stained cells/parasites).