The Bresser Bino Researcher microscope is based on a solid metal body. The wide magnification range of 40x-1000x is reached with 4 objectives and one (changeable) pair of eyepieces. So, this instrument fulfills higher demands. The 40x- and the 100x-objective are retractable (safeguarding against damage). The 100x-objective is intended for oil immersion microscopy (immersion oil is included). The halogen lamp is bright (20 W), and its intensity is variable with a dimmer.