The BRESSER Junior Microscope 40x - 640x is perfect for beginners to explore the microcosm! The microscope has an LED transmitted light illumination. transmitted light? What does that mean? With this type of microscope, the sample to be observed is not illuminated from above, but the light source lies behind the sample and shines through it. Therefore, particularly thinly sliced preparations are required. Our recommendation With the optionally available smart microscopy accessories from BRESSER Junior (Art.