8x25mm Extreme ED Waterproof Short Focus Macro Telescope【K358】

**Hamlet Optical Series** **8x25mm Extreme ED Waterproof Short Focus Macro Telescope【K358】** **product description** The short-focus macro telescope belongs to the refractive optical system of the Keplerian Telescope. It is an improvement of the Galilean telescope. The original concave lens eyepiece is changed to a convex lens. It was originally used in astronomy. It can be made into a large field of view, high magnification, but inverted. Imaging astronomical telescopes. Afterwards, a bulge is added between the two convex lenses, and it can be transformed into an upright image. The short-focus macro telescope has the advantages of lightness, small size and high resolution. The two biggest features are "Short Focus", which can view the details of nearby objects in a very short distance; the optical system can also provide high diopter, It is often used to assist patients with amblyopia and low vision (Low-Vision) to view distant objects. Suitable for low vision aids, watching blackboards in class, bus numbers, street numbers, visual training for the weak eye, museum exhibition tours, outdoor travel, flower viewing, butterfly viewing, and insect observation. Hamlet Extreme ED waterproof short-focus macro telescope is equipped with ED ultra-low dispersion lenses at the eyepiece and objective lens, which greatly reduces the dispersion phenomenon at the edge of the observed object to present the most realistic colors. Dielectric High Reflection Coating (DIE, Dielectric Coating) is used, which can achieve a high reflectivity of up to 99% in the visible spectrum range, minimizing light loss, fully leading into the eyepiece, and achieving the maximum brightness of the field of view, even in low visibility or light Clear and bright images can still be maintained in dim environments. FMC full coverage multi-layer coating makes the imaging contrast sharper and clearer. The internal lens group is filled with high-purity nitrogen gas. Using the principle of different gas specific gravity, it can be sealed through an O-ring to achieve a 100% airtight and waterproof effect. Even if it is exposed to splashing water, rain or 1 meter underwater, there is no need to worry . 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, so that people who have used it can't put it down. **feature of product** **ED Extra Low Dispersion Lens Restores True Colors** Due to the different color wavelengths of visible light, when the light is refracted by the lens, it will enter at different refraction angles, and the edge contour of the object image seen by the naked eye through the lens will have a color deviation. This optical phenomenon is called "dispersion" or "color dispersion". aberration". ED (Extra low Dispersion) is an essential material for top-level telescopes. It has the advantages of a high Abbe Number, which greatly improves the dispersion (chromatic aberration) and makes the details and layers of the image faithfully presented, unprecedented. The visual feast will bring you the deepest touch. **DIE dielectric high reflective coating** Dielectric High Reflection Coating (DIE, Dielectric Coating) has a high reflectivity of more than 99% in the visible spectrum range, which can nearly completely retain the light entering from the objective lens, reduce light loss, and guide sufficient light into the eyepiece to achieve The maximum brightness of the field of view keeps clear and bright even in low visibility and dimly lit environments. **FMC Full Coverage Multilayer Coating** The lens coating can reduce the loss caused by the reflection of light on the lens, so as to increase the brightness and contrast of the image. FMC (Fully-Multi-Coated Optics), the internal mirror group is fully covered with multi-layer coating, which can greatly improve the light transmittance and contrast of the optical mirror group to obtain brighter and sharper images. **Bright BaK-4 Prism 騜鏡** High-brightness BaK-4 (barium crown glass) is used as the material, which can make the image more delicate and the field of view brighter when viewing. **Water Proof nitrogen filled airtight waterproof** The internal lens group has been treated with nitrogen gas and a special O-ring design, which can prevent water vapor from entering and achieve a 100% Water Proof waterproof effect. Even if it is used in rainy days or accidentally dropped into water, it can avoid water damage. The feet will not enter the water for 30 minutes. Prevent the moldy condition of the internal mirror group, and reduce the fogging of the internal mirror group caused by temperature difference. **Swing-out eyecup** The eyepiece is designed with a high eye point, the good vision distance is 16mm, and the diameter of the eyepiece is increased to 17mm, which can easily obtain a clear and bright field of vision, suitable for users who wear glasses. For users without glasses, the eyecup can be unscrewed and rests lightly on the eye socket for the most comfortable viewing. **How to use** 1. Remove the eyepiece cover and objective lens cover. The rubber part is the eyepiece. If you are observing with the naked eye, unscrew the eyecup; if you wear glasses, please unscrew the eyecup. 2. Put your eyes lightly on the eyepiece, look at the target object, hold the barrel of the scope, and turn the focus wheel in the middle of the fuselage with your fingers to adjust the focus, and the image will change from blurred to clear. 3. Turn towards the big mountain pattern for telephoto, and the focal length is infinity; turn towards the small flower direction for macro, which can be viewed at a close distance. **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 to strong impact to avoid deflection of the telescope's internal mirror group. ． Do not look directly at the sun or strong light with a telescope, which may cause damage to eyesight. ． Although this product has been treated with waterproof and nitrogen filling, please dry it after encountering water and store it in a moisture-proof box. ． To ensure safe use, please avoid viewing dangerous creatures such as bees, spiders, and poisonous snakes during macro observation. **product specification** Original number: K358 Magnification: 8 times Objective lens diameter: 25mm Eyepiece diameter: 17mm Optical system: Keplerian Telescope Kepler telescope optical system 稜鏡 system: Roof vertical ridge type 稜鏡 system Lens material: ED ultra-low dispersion Stone lens, BaK-4 (barium crown glass) 稜鏡 Lens coating: DIE dielectric high-reflection coating, Fully-Multi-Coated full-cover multi-layer coating Eyecup: Swing-out eyecup View angle: 6.8 degrees Field of view: 119m @ 1000m Closest focusing distance: 35cm (turn the focus wheel to the bottom of the small flower pattern) The farthest focusing distance: infinity (the focus wheel is turned to the bottom of the mountain pattern) Exit pupil diameter: 3.125mm Relative Brightness: 9.8 Material: aluminum alloy Body size: diameter 31x length 97mm Weight: 164g Accessories: storage case, eyepiece cover with mirror, objective lens cover with mirror, hand Silicone lanyard, cleaning cloth, product warranty card Origin: Entrusted to produce in mainland China Product warranty: one year **brand introduction** https://www.hwatang.com.tw/uploads/editor/hwatang-logo-M2.jpg?1498211963935 Since its establishment in 1984, Huatang Optical Industry Co., Ltd. has been engaged in the manufacturing, production and import of various magnifying glasses, telescopes, compass, optical microscopes and other products. It is an optical instrument company with the largest number of magnifying glasses in China. Various industries improve work efficiency, help many people with degraded vision and eye diseases to see more clearly, and provide consumers with high-quality products at affordable prices. You no longer 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 started our own brand and entered the international market with the "Hamlet Optics" optical series, especially the hand-held magnifiers, portable leather magnifiers, and metal cloth mirrors. Good weapon. We continue to explore the needs of users and develop various innovative products, hoping that every public can read comfortably and regain the joy of reading. Huatang Optical honestly provides product specifications and manufacturing origin information, so that you don't have to worry about buying inferior products with large magnifications, or passing mainland products as products made in Taiwan. https://www.hwatang.com.tw/uploads/editor/hwatang-company3-PL2.jpg?1497865948803