AmScope ZM245NT Trinocular Stereo Microscope Head, EW10x Focusing Eyepieces, 2X-45X Zoom Magnification, 0.67X-4.5X Zoom Objective, Includes 0.3x Barlow Lens

The AmScope ZM245NT trinocular stereo microscope head has a 0.67x-4.5x zoom objective, a pair of 10x22mm extreme-widefield high-eyepoint focusing eyepieces, and a 0.3x Barlow lens. The microscope head has a 2x-45x magnification range and a 3" O-ring style mounting ring. The trinocular viewing head has an interpupillary range of 47 to 75mm, a 45-degree inclination to reduce eye and neck strain, and 360-degree rotation to enable sharing. The vertical trinocular port can be used as a C-Mount or 23mm photo port (camera sold separately). The EW10x22mm extreme-widefield high-eyepoint eyepieces combine with the 0.67x-4.5x zoom objective to provide a longer working distance for inspecting large-scale specimens that require handling or repair. The microscope comes with a 0.3x Barlow lens that can be added to the objective to decrease the magnification range. A Barlow lens with a magnification of less than 1.0 reduces magnification and increases the working distance. Focusing eyepieces provide fine focus, high-eyepoint eyepieces ease viewing for users who wear glasses, and dioptric adjustment accommodates individual eye-strength differences. The optical glass lenses provide sharp images, and are fully-coated to ensure high-resolution images. A stereo microscope, sometimes called an inspection or dissection microscope, has low magnification and a long working distance that enables users to manipulate the object being inspected. SpecificationsHeadTrinocularMagnification2x-45xObjective power0.67x-4.5xEyepieces (30mm)EW10x22mm, focusingTrinocular portC-Mount or 23mmOptical working distanceUp to 14"Field of viewUp to 5-3/4"Head mounting size3", O-ring styleAccessory mounting size1-7/8" (48mm), female threadMicroscopes 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.United Scope manufactures microscopy equipment and accessories under the brand name AmScope. The company, founded in 1996, is headquartered in Irvine, CA.What's in the Box?AmScope trinocular stereo zoom head with 0.67x-4.5x objectiveEW10x focusing eyepieces, one pair0.3x Barlow lensEye guards, one pair

• Stereo microscope head for home or classroom use enables students and hobbyists to inspect biological specimens, rocks, stamps, jewelry, and large specimens that require handling or manipulation
• Trinocular viewing head with pair of 10x extreme-widefield high-eyepoint focusing eyepieces, adjustable interpupillary distance, a 45-degree inclination to reduce eye and neck strain, and 360-degree rotation to enable sharing
• 0.67x-4.5x zoom objective provides low magnification and longer focal length for inspecting large-scale specimens, and a 0.3x Barlow lens extends the working distance
• 3" O-ring style mounting head and 1-7/8" (48mm) female thread accepts a light or Barlow lens (light sold separately)