The BestScope BLM-500 Digital Polarizing Siedentopf Binocular Compound Microscope with 9" HD LCD has a pair of 10x extra-widefield eyepieces, a reverse-mounted nosepiece with four LWD infinity plan achromatic objectives, halogen illumination, coaxial nested coarse and fine focus, an integrated field and aperture diaphragm, and a rotating round stage. The 5.0MP digital camera captures and displays images on a computer or projector. Images are also displayed on the built-in HD LCD screen. The Siedentopf binocular head has a pair of eyepieces with interpupillary adjustment, and a fixed inclination to reduce eye and neck strain. A Siedentopf binocular head enables the viewer to change the interpupillary distance without changing the tube length, eliminating the need to refocus the image. A reverse-mounted nosepiece keeps objectives out of the way to prevent damage and contamination, and to enable more secure slide handling. Infinity plan achromatic objectives provide color correction, focus over the entire range of the viewing field, and a longer working distance for improved focus when auxiliary components are utilized. Long working-distance (LWD) objectives allow for viewing samples through thick glass plates and vessels. The 40xS and 60xS objectives are retractable and spring-loaded to prevent damage to the slide or objective when focusing. A digital polarizing microscope uses transmitted and reflected light and a polarizing unit to enhance contrast for viewing birefringent specimens (those with double refraction) in geological, metallurgical, chemical, pharmaceutical, and industrial applications where image capture, detailed records, or documentation is required. The digital camera has a 1/2.5" CMOS color sensor for displaying still microscopy images and streaming live videos on the built-in LCD screen or to a computer or projector. Images can be stored on the included SD card. The camera has USB 2.0 and HDMI outputs. The microscope has upper (episcopic) illumination that reflects light off the specimen for enhanced visibility of opaque specimens, and lower (diascopic) illumination that transmits light up through the specimen for enhanced visibility of translucent and transparent objects. The polarizing unit consists of a polarizer and analyzer, both of which can rotate 360 degrees. The halogen light source provides bright light in a concentrated path, and a rheostat controls the amount of light emanating from the lamp. An integrated field and aperture diaphragm optimizes the amount of light illuminating the specimen. The round stage rotates to position specimens. Coaxial coarse and fine focus knobs are nested to speed focusing for left-and right-handed viewers, and tension adjustment ensures specimen stays focused during viewing. Microscope Head and Optics SpecificationsHeadBinocular, SiedentopfMagnification range50x-600xHead inclination30 degreesInterpupillary adjustment48 to 75mmEyepieces (22mm)WF10xNosepieceQuadruple, reverse-mountedObjectives, LWD infinity plan achromatic5x, 10x, 40xS, 60xSMicroscope Illumination and Stage SpecificationsFocus typeCoaxial coarse and fineLight sourceHalogen with rheostat, 6V/30WIllumination typePolarizing, transmitted and reflectedStage typeRound, rotatingPower12VDC (90V-240V input)Display and Camera SpecificationsDisplay9" HD LCD (1280 x 800 effective pixels)Digital zoom8xResolution, still image12.0MPResolution, video1080pFrame rate30fpsImage typeStill image and video display and captureCamera sensor1/2.5" 5.0MP Color CMOSData outputsUSB 2.0, HDMIData storage4G SD cardMicroscopes are instruments used to enhance the resolution of an object or image. Types include compound, stereo, or digital. Compound microscopes use a compound optical system with an objective lens and an eyepiece. Stereo microscopes show object depth in a three-dimensional image. Digital microscopes are used to display an image on a monitor, rather than looking through a lens. Microscopes can have monocular (one), binocular (two), or trinocular (three) eyepieces, with varying magnification abilities. Magnification ability refers to the size of an image. Resolution, also known as resolvant power, refers to the clarity of the image. The interaction between field of view (FOV), numerical aperture (NA), and working distance (WD) determines resolution. Microscopes can control magnification through a fixed focus, or through a range of adjustments. They can also utilize LED, fluorescent, and mirror light sources to help control viewing capabilities. Microscopes are widely used in education, lab research, biology, metallurgy, engineering, chemistry, manufacturing, and in the medical, forensic science, and veterinary industries.BestScope International Ltd. manufactures microscopes, digital cameras, and accessories for education, inspection, research, and clinical and industrial applications. The company, founded in 1995, is headquartered in Beijing, China. What's in the Box?BestScope BLM-500 Digital Polarizing Siedentopf Binocular Compound Microscope with 9" HD LCD(2) WF10x eyepieces, 22mm5x LWD infinity plan achromatic objective10x LWD infinity plan achromatic objective40xS LWD infinity plan achromatic objective60xS LWD infinity plan achromatic objective4G SD card
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