How to use high power lens
(1) Choose a good target: You must first move the part that needs further observation to the center under a low-magnification lens, and at the same time adjust the object image to the clearest level before you can observe it with a high-magnification lens.
(2) Turn the converter and replace it with a high-power lens. When converting the high-power lens, the rotation speed should be slow and observe from the side (to prevent the high-power lens from colliding with the glass). If the high-power lens hits the glass, it means that the focal length of the low-power lens is not correct. After adjustment, operation should be repeated.
(3) Adjust the focal length: After switching to a high-power lens, use your left eye to observe on the eyepiece. At this time, you can generally see an unclear object. You can move the spiral of the fine adjuster counterclockwise about 0.5-1 turn, that is, Get a clear object image (do not use coarse adjuster!)
If the brightness of the field of view is not suitable, you can use the light collector and aperture to adjust it. If you need to replace the slide specimen, you must turn the coarse adjuster clockwise (do not turn in the wrong direction) to lower the stage before removing the slide specimen.
【Precautions】
■When holding the mirror, you must hold the arm with your right hand and the holder with your left hand. Do not lift it with one hand to avoid parts falling off or hitting other places.
■Hand it with care. Do not place the microscope on the edge of the experimental table to avoid knocking it over and falling to the ground.
■Keep the microscope clean. The optical and lighting parts can only be wiped with lens cleaning paper. Do not blow your hands or wipe with a cloth. Use a cloth to wipe the mechanical part.
■Do not let water droplets, alcohol or other chemicals come into contact with the lens and stage. If contaminated, wipe it off immediately.
■When placing the slide specimen, align it with the center of the light hole, and do not place the slide upside down to avoid crushing the slide or damaging the objective lens.
■Develop the habit of opening both eyes at the same time. Use the left eye to observe the field of vision and the right eye to draw.
■Do not remove the eyepiece at will to prevent dust from falling into the objective lens, and do not disassemble various parts at will to prevent damage.
■After use, it must be restored before it can be put back into the mirror box. The steps are: remove the specimen, turn the rotator to move the lens away from the light hole, lower the stage, lay the reflector flat, and lower the collector (but do not touch the reflector) lens), close the aperture, return the film pusher, cover it with silk cloth and outer cover, and put it back into the experimental bench cabinet. Finally fill in the registration form. (Note: The reflector should usually be placed vertically, but sometimes because the light collector is not raised to the desired height, the aperture will be damaged when the stage is lowered, so it is placed horizontally instead)
