Course adjustment
Course Focus Knob- low Fine Focus Knob- high -MC
The coarse focus knob is used to bring the specimen into general focus when using the low-power lens on a microscope. This knob moves the stage up and down to adjust the distance between the lens and the specimen, allowing for rough focusing.
place on the slide adjust it focus at low power increase the power
it allows you to focus your lens on the pbject.
the first thing you do you take microscope and you you do it like the low power to the highest power until it get focus.
You would turn the nosepiece or turret on the microscope to switch from low power objective lens to a medium power objective lens. This allows you to change the magnification level and focus on different parts of the specimen being viewed.
For course focusing the primary stage is used.
You would use the coarse focus knob to focus on low power. Turn the coarse focus knob clockwise to bring the specimen into view and then fine-tune using the fine focus knob.
Which of the following is a correct procedure for the operation of a microscope? First, put the specimen into focus using a low power lens, then switch to a lower power lens if needed.Remove and add slides while the high power lens is selected.First, put the specimen into focus using a low power lens, then switch to a higher power lens if needed.Use the fine focus knob with the low power lens and use the coarse focus knob with the high power lens
The coarse focus knob should be used with the low power objective but not with the high power objective. The point of using the coarse focus knob is to bring the specimen into general focus before fine-tuning with the high power objective, which requires more precise adjustments.
parfocal
The eyepiece lens of a compound microscope acts essentially a low power (x10 or so) magnifier of the real image created by the objective lens.