To review the optical train of the microscope illustrated in Figure 1, the light is first focused on the specimen before being captured by the objective lens and directed to a beamsplitter located in the body between the nosepiece and the binocular eyepiece housing. In addition, reciprocity and exposure errors are reduced or even eliminated by the advanced exposure measurement system with built-in reciprocity compensation. This reduces the number of lenses and reflecting surfaces in the optical pathway and results in the fastest possible shutter speeds, minimizing the effects of vibration and stage drift. The microscope illustrated in Figure 1 is designed with a sliding mirror system, in which the image formed by the objective lens is projected directly onto the film plane rather than being relayed through a series of lenses. Presented in Figure 1 is a complex state-of-the-art advanced automatic exposure photomicrography system, typical of that found on high-end contemporary reasearch microscopes. Modern microscopes with integral camera systems offer a significant advantage to the microscopist in the ability to control the light path through the microscope. Photomicrographic equipment ranges from the comparatively simple point-and-shoot camera with an integral lens to sophisticated light-metering camera systems capable of accurately measuring exposures and automatically compensating for artifacts such as reciprocity failure and dense filtration. The camera body itself has the function protecting the film in a light-tight compartment and correctly positioning the film within the focal plane for exposure, then advancing the film roll one frame at a time after each new photomicrograph is recorded.
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