Why do you have to make sure tha the area you wish to study is in the center of the field of view before changing objectives?

Ensuring that the area of interest is centered in the field of view before changing objectives is crucial because it prevents losing sight of the specimen during the transition. Higher magnification objectives have a narrower field of view, making it easy to miss the target if it isn't centered. Additionally, this practice helps maintain focus and reduces the risk of damaging the slide or the objectives by keeping them properly aligned. Proper centering enhances the efficiency of the observation process.