8x25mm Ultimate ED Waterproof Short Focus Macro Telescope [K358]

**Hamlet Optical Series** **8x25mm Ultimate ED Waterproof Short Focus Macro Telescope [K358]** **Product Introduction** The short-focus macro telescope belongs to the Keplerian Telescope refractive optical system. It is an improvement on the Galileo telescope, changing the original concave lens eyepiece to a convex lens. It was originally used in astronomy and can be made into an astronomical telescope with a large field of view, high magnification but inverted imaging. Then a prism is added between the two convex lenses to convert the image into an upright one. In addition to the advantages of being light, thin, short and high-resolution, the two biggest features of short-focus macro telescopes are "Short Focus", which allows them to view the details of nearby objects at a very short distance; the optical system can also provide high refractive power, which is often used to assist patients with amblyopia and low vision to view distant objects. Suitable for low vision assistive devices, viewing classroom blackboards, bus numbers, street house numbers, weak eye vision training, museum exhibition tours, outdoor travel, flower viewing, butterfly viewing, and insect observation. Hamlet's ultimate ED waterproof short-focus macro telescope is equipped with ED extra-low dispersion lenses in both the eyepiece and the objective lens, which greatly reduces the dispersion phenomenon at the edges of the observed objects to present the most realistic colors. The use of dielectric high-reflective coating (DIE) can achieve a high reflectivity of up to 99% in the visible spectrum, minimizing light loss and fully directing it into the eyepiece to achieve maximum brightness in the field of view, maintaining a clear and bright image even in low visibility or dim light environments. FMC full-coverage multi-layer coating makes the image contrast sharper and clearer. The internal lens assembly is filled with high-purity nitrogen. Using the principle of different gas specific gravities and sealed with O-rings, it can achieve a 100% airtight and waterproof effect. There is no need to worry even if it is exposed to splashing water, rain, or 1 meter underwater. The unique internal focusing design allows users to easily operate it with one hand. It is easy to carry and has a wide range of uses, making it a favorite among people who have used it. **Product Features** **ED extra-low dispersion lens restores true color** Due to the different wavelengths of visible light, when light is refracted through a lens, it will enter at different refraction angles. The edge contours of the image of the object seen by the naked eye through the lens will have color deviations. This optical phenomenon is called "dispersion" or "chromatic aberration." ED (Extra low Dispersion) lenses are essential materials for top-level telescopes. They have the advantage of a high Abbe number, which greatly improves the dispersion (chromatic aberration) condition, allowing the details and layers of the image to be faithfully presented. The unprecedented visual feast will bring you the most profound touch. **DIE Dielectric High Reflective Coating** Dielectric Coating (DIE) has a high reflectivity of over 99% in the visible spectrum, which can almost completely retain the light entering from the objective lens, reduce light loss, and guide sufficient light into the eyepiece to achieve maximum brightness in the field of view, keeping it clear and bright in low visibility and dim light environments. **FMC Fully Multilayer Coating** Lens coating can reduce the loss of light caused by prism reflection, thereby increasing image brightness and contrast. FMC (Fully-Multi-Coated Optics) completely covers the internal lens group with multi-layer coating, which can greatly improve the transmittance and contrast of the optical lens group to obtain brighter and sharper images. **Bright BaK-4 Prism** Using high-brightness BaK-4 (barium crown glass) as the prism material can make the image more delicate and the field of view brighter when viewing. **Water Proof Nitrogen filled airtight waterproof** The internal lens assembly is filled with nitrogen and has a special O-ring design to prevent moisture from entering, achieving a 100% water proof waterproof effect. Even if used in the rain or accidentally dropped into water, it can avoid water damage and will not get wet even if immersed in water for 1 meter for 30 minutes. Prevent the internal mirror group from getting moldy and reduce the temperature difference that causes the internal mirror group to fog up. **Twist-out eyecup** The eyepiece adopts a high eye point design with an optimal viewing distance of 16mm. The eyepiece diameter is enlarged to 17mm, which can easily obtain a clear and bright field of view, suitable for users who wear glasses. Users who do not wear glasses can twist out the eyecup and place it lightly against the eye socket for the most comfortable observation. **How to use** 1. Remove the eyepiece cover and objective lens cover. The rubber part is the eyepiece. If you observe with the naked eye, screw out the eyecup; if you wear glasses, screw the eyecup in. 2. Put your eyes lightly on the eyepiece, look at the target object and observe it. Hold the telescope barrel and turn the focusing wheel in the middle of the body with your fingers to focus. The image will change from blurry to clear. 3. Turn it towards the mountain pattern to telephoto, with the focal length at infinity; turn it towards the small flowers to macro, allowing for close-up viewing. **Precautions** ． The focal lengths stated in the specifications are actual test results, but may vary slightly due to individual vision conditions. ． Do not drop or subject it to strong impact to avoid displacement of the internal mirror assembly of the telescope. ． Do not look directly at the sun or strong light through the telescope, as this may cause damage to your eyesight. ． Although this product has been waterproofed and nitrogen-filled, please wipe it dry after contact with water and store it in a moisture-proof box. ． To ensure safety, please avoid viewing dangerous creatures such as bees, spiders, and poisonous snakes during macro observation. **Product Specifications** Original manufacturer number: K358 Magnification: 8x Objective lens diameter: 25mm Eyepiece diameter: 17mm Optical system: Keplerian Telescope Kepler Telescope Optical System Prism system: Roof vertical ridge prism system Lens material: ED extra-low dispersion Stone lens, BaK-4 (barium crown glass) prism Lens coating: DIE dielectric high reflective coating, Fully-Multi-Coated full coverage multi-layer coating Eye mask: twist-out eye mask Field of view: 6.8 degrees View range: 119m @ 1000m Minimum focusing distance: 35cm (focus wheel turned to the bottom with small flower pattern) Maximum focus distance: Infinity (focus wheel turned to the bottom towards the mountain pattern) Exit pupil diameter: 3.125mm Relative brightness: 9.8 Material: Aluminum Alloy Body size: diameter 31 x length 97mm Weight: 164g Accessories: Storage case, integrated eyepiece cover, integrated objective lens cover, hand Silicone lanyard, lens cleaning cloth, product warranty card Origin: Made in China Product warranty: one year **Brand Introduction** https://live.staticflickr.com/65535/53802868882_756aba87d7_n.jpg Since its establishment in 1984, Huatang Optical Industrial Co., Ltd. has been engaged in the manufacturing and import of various magnifying glasses, telescopes, compasses, optical microscopes and other products. It is the optical instrument company with the largest number of magnifying glasses in the country. We assist all walks of life to improve work efficiency, help many people with vision degeneration and eye diseases to see more clearly, and provide high-quality products to consumers at affordable prices. You don’t have to worry about spending a lot of money but not being able to buy suitable products. The year after the company was founded, we launched our own brand, "Hamlet Optics", to enter the international market. Our handheld magnifiers, portable leather magnifiers, and metal cloth magnifiers are the best tools that are sold both domestically and internationally and are well-known around the world. We continue to explore user needs and develop various innovative products, hoping that everyone can read comfortably and rediscover the joy of reading. Huatang Optics honestly provides product specifications and manufacturing origin information, so you don't have to worry about buying inferior products with greatly inflated magnifications, or products made in China being mixed with products made in Taiwan. https://www.hwatang.com.tw/uploads/editor/hwatang-company3-PL2.jpg?1497865948803