Wide field and wide angle are a type of eyepiece, with a wider viewing angle and shorter focal length than regular eyepieces Rotate the objective conversion table, and when you hear a sound, it indicates that you have adjusted to the corresponding magnification. The longer the objective lens, the greater the magnification Keep the objective lens as close as possible to the specimen, observe from the eyepiece, and then slowly move the lens tube upwards in reverse until the image is clear Rotate and adjust the position of the LED light to turn on the LED light and make it shine on the position of the loading platform hole, providing a lighting source External mobile phone shooting bracket, capable of taking photos, recording, and sharing