The VanGuard 1423PHi clinical microscope has two viewing heads, Brightfield, darkfield and phase contrast configurations, integrated Koehler illumination, plan achromatic objectives, and magnification abilities of 10X, 20X, 40X, and 100X, (oil immersion method) for a variety of applications. This compound microscope enhances object or image resolution, and is commonly used in demanding applications, including diagnostic and educational uses in medical and veterinary clinics, universities, and industrial laboratories.

This microscope features binocular viewing heads, to ease eye strain and to provide a more comprehensive view. The unit has 55-75mm interpupillary adjustment for individual eye spacing, and - 6 to + 6 dioptric adjustment capabilities, to compensate for the difference in viewing ability between each eye. It has a VanGuard infinity-corrected optical system (VIOS) for clear images. The microscope has Deutsches Institut für Normung (DIN)-standard plan achromatic objective lenses, which correct for red and yellow chromatic aberrations, and sharpen images. Adjustable resolution provides resolvant options of 10X (0.25 NA), 20X (0.40 NA), 40X (0.60 NA), and 100X (1.25 NA) (oil immersion method). Integrated Koehler illumination controls brightness, and Brightfield configuration controls light from below, allowing a specimen to absorb light for clear illumination. Darkfield and phase contrast illumination configurations enhance contrast, and produce clearer images of opaque or unstained objects. The unit adjusts light through a 1.25 numerical aperture (NA) Abbe condenser with an iris diaphragm. A Zernike phase annuli condenser has 10X, 20X, 40X, and 100X objectives. The condenser is mounted on a rack and pinion focusing mechanism, and the unit has a filter holder on the collector. The unit has 20-watt variable quartz halogen lighting. It has a 10X widefield eyepiece magnifier, which locks on to the unit for ease of operation. The eyepi