National Optical 131 Student Compound Microscope with Tungsten Illumination Item Description Compound microscope provides high magnification for biological use and educational applications Monocular viewing head with 18mm 10x widefield eyepiece with pointer, fixed 45-degree vertical inclination to reduce eye and neck strain, and 360-degree rotation capability to provide a more comprehensive view and enable sharing Forward-facing nosepiece with 4x, 10x, and 40xR DIN achromatic, parfocal, parcentered objectives that provide color correction of magnified images and keep the image centered and focused when magnification is changed Brightfield, tungsten illumination and built-in 0.65 NA condenser with five-hole disc diaphragm for clear examination and light control Plain stage with clips secures slide in place, and separate coarse and fine focus knobs speed focusing Features The National Optical 131 Basic Monocular Compound Microscope has a 10x widefield eyepiece with pointer, a forward-facing nosepiece with three DIN achromatic objectives that are parcentered and parfocal, tungsten illumination, separate coarse and fine focus, a disc diaphragm, and a plain stage with stage clips. The monocular viewing head has a fixed inclination to reduce eye and neck strain, and 360-degree rotation capability to enable sharing. An eyepiece pointer is used to identify features for students. A forward-facing nosepiece eases changing objectives. Rotation positions with secure, positive stops ensure accurate positioning and support a range of magnification options. Achromatic objectives provide color correction of magnified images. Parcentered and parfocal objectives ensure that the image stays centered and focused when the magnification is changed. The 40xR objective is retractable and spring-loaded to prevent damage to the slide or objective when focusing. A basic compound microscope is used in classroom, home school, and hobbyist settings for inspection and dissection of specimens when two-dimensional images are desired. The microscope has lower (diascopic) Brightfield illumination that transmits light up through the specimen for enhanced visibility of translucent and transparent objects. Brightfield (BF) illumination allows the specimen to absorb light, resulting in a dark image on a light background. The tungsten (incandescent) light source provides bright light. A disc diaphragm controls the amount of light illuminating the specimen. The plain stage has an opening for light transmission, stage clips to secure the slide or specimen in place while viewing, and pre-drilled holes that accept a mechanical stage (sold separately). Separate coarse and fine focus knobs speed focusing. A slip clutch prevents excess pressure from damaging the slides or objectives, a stage stop prevents the stage or specimen from coming into contact with the objectives, and a focus tension control prevents stage drift. The cast metal frame provides durability and has a gray enamel finish. Microscope Head and Optics Specifications Head Monocular Magnification range 40x-400x Head inclination 45 degrees Eyepiece (18mm) WF10x Nosepiece Forward-facing Objectives, DIN achromatic, parcentered, parfocal 4x, 10x, 40xR (retractable) Microscope Illumination and Stage Specifications Focus type Separate coarse and fine Condenser 0.65 NA Light source Tungsten, 20W Diaphragm Disc, five-hole Illumination type Brightfield Stage type Plain Stage dimensions 110 x 120mm (W x D) Power 110V W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. Microscopes 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. National Optical and Scientific Instruments manufactures microscopes and microscope cameras. The company, founded in 1991, is headquartered in Schertz, TX. What's in the Box? National Optical 131 Basic Monocular Compound Microscope WF10x eyepiece, 18mm 4x DIN achromatic objective 10x DIN achromatic objective 40xR (retractable) DIN achromatic objective Dust cover Instructions Additional Information Manufacturer: National Optical Shipping Weight: 910 Product Dimensions: Width: 12.00 Length: 17.70 Height: 11.30 Shipping Details Depending on your location and on package weight, items will be shipped by USPS or UPS. All stock is at our USA warehouses. Most orders ship within 24 hours of processing your payment unless stated differently. Check our feedback to see how our customers love the FAST shipping we offer! Shipping is always free! 30 days Return & Refund Policy We provide a 30 days return/exchange policy for our products. The buyer can choose between a refund or an exchange to his/her product. In case of defectives found, only factory defects are accepted as the reason of return. The package of the returned item(s) must be completely intact, and all accessory(s) inside the package must be original and in perfect condition. We do not cover the postage costs for returned defective items. Items returned must be received within 30 days from purchase. No refund or replacement is issued after this period of time. Please allow up to 7 working days for your return to be processed after it is received by us. We are extremely fair, and in the rare event of something out of the ordinary happening, we will gladly work with you to find a solution. Our Guarantee Your satisfaction is guaranteed! We offer a 100% Satisfaction Guarantee on all sales. If you are not happy with your purchase for any reason, please contact us within seven days of receipt of your item, or email us to share your concerns. As mentioned before we are extremely fair and will happily work with you to find a solution to any problem. As you can tell from our feedback, pretty much every single one of our customers is a happy one. So in the rare case something does go wrong, before leaving a negative feedback, contact us so we can help you and make things right! About Us We sell on eBay since 2004. We are based in the USA and ship from our own warehouse. Our products are a 100% authentic and all brand new. We work with the biggest suppliers in the US to bring you the best quality items you can get! We guarantee to provide the best service you have ever seen before! Please see our other items Automotive Baby Camera & Photo Clothing Electronics Health & Personal Care Home & Kitchen Office Shoes Sports & Outdoors Toys & Games Feedback Profile Other Auctions
By clicking "Accept All Cookies", you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts.
