Review on 🔬 AmScope PA40X 40X (Spring) Plan Achromatic Microscope Objective Lens by Matthew Sytniak

I bought this lens to replace the standard lens on my AmScope B490B microscope. When a standard lens is focused on the center of the field, the area around the center gets progressively blurrier as it gets closer to the edges. With this plan, the entire field is in focus, resulting in a much more comfortable viewing experience. I should add that AmScope's standard shipping is fast; three days for this order.