The FM820T is an upright fluorescence microscope with transmitted and reflected lighting, and a six-filter turret. The microscope is built around an infinity-corrected optical system with a wide magnification range, and Koehler diascopic and episcopic illumination. The powerful 100W, wide-spectrum, mercury-vapor episcopic illuminator uses a rotary filter-selector which can house up to six fluorescence filter-blocks; already included are ultraviolet, violet, blue, and green excitation blocks. The sub-stage illuminator uses a 30W halogen lamp with field-lens and diaphragm for even, high-contrast lighting. Viewing Head The microscope's head is designed for precision and comfort. The super-widefield optics provide a larger field-of-view so you can see more specimen at any magnification. Compensation-free Siedentopf interpupillary adjustment allows any user to properly align the oculars without readjusting focus. For users with astigmatism or asymmetrical vision, the left ocular can be adjusted to fine-tune focus. The photo port is equipped with a 23mm tube for attaching cameras with compensating lenses, and is height-adjustable to match focus with the eyepieces. The port is compatible with our YX series C-mount adapters which can attach directly to C-mount cameras without a compensating lens – ideal for 1” format sensors. The head is set to a 30° incline which is ideal for viewing from a standing position, and it can be rotated 360°. OpticsThe infinity-corrected optical system eliminates optical errors when using filters and other in-line components, ensuring highly precise images. The quintuple objective turret provides instant access to 5 magnification levels. This allows you to efficiently move through magnifications from 40X to 1000X. 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, with planatic flat-field correction to provide edge-to-edge sharpness. The Stage The 2-layer mechanical stage provides smooth and precise movement for examination of specimen slides, with a large translation range for viewing larger samples. 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. Symmetrical focus controls are coaxially mounted for fast, intuitive focusing. A height limit can be set to prevent contact damage, as well as presetting optimal focus distance. Koehler Transmitted Illumination Built on Koehler illumination principals, the sub-stage lighting provides evenly-distributed light for optimal contrast. The rear-mounted 30W halogen light-source provides 100 CRI illumination with ample brightness for contrast-enhancement methods like darkfield. The lower color temperature of the halogen light-source causes less eyestrain compared to high-Kelvin LED. The light condenser uses a swing mechanism for optimized lighting at both high and low magnifications, with a NA0.25 setting for full coverage at extremely low magnifications. An iris diaphragm allows you to adjust the aperture to optimize contrast and depth-of-field. The condenser holder uses rack-and-pinion height adjustment for precision control, and is centerable for proper alignment. The condenser is top-mounted for easier replacement when working with additional condensers. The illuminator's field lens provides an iris diaphragm to control light-spread, optimizing contrast and definition in specimen features. Epi-fluorescence Illumination The epi-fluorescence illumination system adds incredible versatility to the microscope. The ability to isolate fluorescing compounds allows you to target individual proteins and other nuances. This microscope is equipped with a six-position filter turret for easy transitions. Four filter blocks are already mounted (ultraviolet, violet, blue, and green) for popular labeling agents and natural fluorophores. The illuminator uses a high-power mercury arc-lamp for wide-spectrum excitation. Specifications Optical System: Infinite-conjugate Reference Focal Length: 200mm Head: Trinocular, 30° incline, 360° rotatable Photo Port: height-adjustable YX series, 23mm tube mount Interpupillary Adjustment: Siedentopf compensation-free, 48-75mm Ocular Diameter: 30mm Ocular Diopters: left ocular Eyepieces: 10X Objective Lenses: Infinity-corrected Objective Parfocal Distance: 45mm Objective Mounting Thread: RMS 20.32mm Objective Turret: Reverse quintuple, ball-bearing movement Focusing System: Coaxial coarse and fine focus, tension control Focus Range: 24mm Coarse Stroke: 37.7mm per rotation Fine Stroke: 0.1mm per rotation Stage Design: Double-layer with caliper Stage Dimensions: 185mm x 142mm X-Y Translation Range: 75mm x 55mm Transmitted Illumination: 6V30W halogen, continuous-adjustment, rear-mount housing with aspherical collector Episcopic Illumination (fluorescence): 100W mercury HBO arc-lamp Fluorescence Filters: -- Ultraviolet: BP330-385nm, DM400nm, BA420nm -- Violet: BP400-410nm, DM455nm, BA455nm -- Blue: BP460-495nm, DM505nm, BA510-550nm -- Green: BP510-550nm, DM570nm, BA590nm Condenser: NA0.9/0.25 achromatic swing condenser with iris diaphragm Sub-stage Condenser-holder: rack and pinion Packing List:One trinocular head One microscope body One photo port assembly Five objective lenses: 4X, 10X, 20X, 40X, 100X One pair 10X eyepieces One stage assembly One swing condenser One halogen illuminator assembly One episcopic illuminator One episcopic lamp housing One power supply for episcopic illuminator One eye shield Two AC power cords (US and Canada standard) One hex driver One dust cover One sample immersion oil