Why is it important to focus specimens under the Low Power Objectve before observing it under the High Power Objective?

Answer 1

It allows you to center the specimen, and if it is set up correctly, then when you switch objectives it should still be there and only need fine focusing.

It also reduces the chance of crushing the specimen and/or breaking the slide or the lens as the LPO is further away from the slide than the HPO.

Answer 2

Focusing under the low power objective first helps to locate and center the specimen, making it easier to maintain in view when switching to the high power objective. It also prevents the high power lens from coming into contact with the slide and specimen, which could damage both. Focusing at low power first allows for a more efficient and accurate examination of the specimen under higher magnification.

Answer 3

So that the specimen will be centered first

Answer 4

Under low power you can see more of the specimen - which is important so that you can easily center it in the field of view, and spot which area(s) you would like to look at in more detail.