The objective lens that will still remain in focus when placed at the longest working distance from the specimen is 10x objective lens.
Microscope objectives are set up with a short free working distance. Working distance is knot to be the point or distance from the front lens element of the objective to the closest surface of the coverslip when the specimen is in sharp focus.
- The distance between the objective lens and the specimen, when the specimen is in focus, is called the working distance of the lens.
- The greater the magnification of the lens, the less the working distance; that is
Conclusively, a 10x objective lens is a low power objectives that has a longer working distances than high power objectives
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