A high power objective, also known as a high dry objective, is used for observing fine detail. Such details include the striations in skeletal muscle, the arrangement of Haversian systems in compact bone and types of nerve cells in the retina.
A high power objective is a type of objective lens that is used in microscopes. It magnifies an object to 40 times its size.
According to the Encyclopaedia Britannica, high power objective lenses have several design problems. The front of the objective to the top of the slide is shorter than other objective lens because the focal length of an objective decreases as the N.A. and the magnifying power increase.