This is an upgraded T590 with both brightfield and darkfield lighting. The heavy-duty design will hold up to years of hard use, and is supported by a large set of accessories including epi-fluorescence, phase-contrast and darkfield kits. The included darkfield condenser allows for darkfield illumination when working with blood or other fluids, and live cells when using objectives up to 60X. This instrument is ideal for scaling laboratories and scholastic demonstrations. The microscope's head is uses a trinocular designed, with a binocular viewing platform and a third port intended for mounting a camera. Siedentopf interpupillary adjustment allows any user to easily align the oculars for comfortable viewing. For users with astigmatism or asymmetrical vision, the right ocular has dioptric adjustment to fine-tune focus. The switched trinocular port provides a dedicated mount for a camera to record photos or videos, and is height-adjustable to match focus with the eyepieces. The ocular tubes are set to a 30° incline, and can be rotated 360° to accommodate viewing from various positions. The objective turret provides instant access to 4 magnification levels to easily focus in on minute details from 40X to 1000X. This covers magnifications needed for studying hair follicles, cells, and bacteria. The turret's reversed orientation provides more working room above the stage. These high-quality lenses are achromatically corrected to improve resolution and color accuracy. The 2-layer mechanical stage provides smooth and precise movement for examination of specimen slides. The stage's low-position controls are conveniently placed near the coaxial focus knobs for a streamlined workflow. Examining specimen slides is intuitive and precise for users at any skill level. Halogen sub-stage lighting provides bright illumination with excellent color rendering. The warm lighting is better suited for prolonged use, causing less eyestrain than LED or fluorescent lighting. The Abbe light condenser has a high 1.25 numerical aperture for oil-immersion, and an iris diaphragm to optimize contrast and depth-of-field. A swing-out filter holder can be used to mount a color filter for band-isolation or to change the light's hue. The condenser holder uses rack-and-pinion movement for precise height adjustment. Darkfield A dry darkfield condenser is included for darkfield observation using the 40X objective lens or lower. Darkfield observation will provide contrast in otherwise indistinguishable objects by highlighting changes in refractive index. This is particularly useful for observing live cells including blood analysis. With a 0.9 numerical aperture, the condenser works with non-immersion lenses. Two centering screws allow you to properly center the condenser for optimal contrast. Specifications Optical System Finite-conjugate Mechanical Tube Length 160mm Head Trinocular, 30° incline, 360° rotatable Interpupillary Adjustment Siedentopf compensation-free gemel, 55-75mm Ocular Diameter 23mm Ocular Diopters right ocular Eyepieces 10X Photo Port Height-adjustable 23mm tube Objective Lenses DIN standard Objective Parfocal Distance 45mm Objective Mounting Thread RMS 20.32mm Objective Turret Reverse quadruple Focusing System Coaxial coarse and fine focus, tension control Focus Range 30mm Division of Fine Focus 0.002mm Stage Design Double-layer with caliper Stage Dimensions 160mm x 140mm X-Y Translation Range 70mm x 50mm Transmitted Illumination 6V/20W halogen Condenser NA1.25 Abbe condenser with iris diaphragmNA0.7-0.9 dry darkfield condenser with centering knobs Sub-stage Condenser-holder rack and pinion Power 115V 60Hz Objective Lenses Magnification Corrections NA Immersion Medium Cover-glass Thickness 4X achromatic 0.10 — 0.17mm 10X achromatic 0.25 — 0.17mm 40X achromatic 0.65 — 0.17mm 100X achromatic 1.25 oil 0.17mm Packing List:One trinocular head One microscope body One photo port Four objective lenses: 4X, 10X, 40X, 100X One pair 10X eyepieces One dry darkfield condenser One power cord (US and Canada standard) One dust cover Two color filters One tension wrench One spare halogen bulb Two spare fuses One sample bottle of immersion oil
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