Speaking of single-pass telescopes, there are two types. One is simply compact and portable, and the other is for bird watching, starry sky or sailing use. In fact, the comfort of a single-lens telescope is far less than that of a binocular. Of course, everyone has different needs. It is very convenient to simply observe the target. In addition, if you have a large vision gap between your eyes, the monocular is also quite suitable for you.
So what do newbies need to pay attention to when buying?
1. Magnification: The greater the magnification, the farther you can see, but at the same time, hand shaking will also be magnified, which is likely to cause dizziness. It is recommended to choose 7-10 times.
2. Caliber: The larger the diameter, the more light is collected, and the clearer the look. The larger the diameter, the weight will increase accordingly. It is recommended to choose between 30-50mm. If you have a steady hand, choose the largest one. Otherwise, around 40 is the best. In addition, more than this value is mostly used for star-gazing or bird-watching, and it needs to be stabilized with a support.
3. Looking at the prism material, those tens of dollars of single-tube telescopes are likely to use BK7 material, which has low light transmittance, dim results, and not sharp, while BAK4 has good light transmittance and clear and bright imaging.
4. Looking at the anti-reflection coating, the more the anti-reflection coating, the clearer the image. Generally, the mirror surface of the single-layer film is red or blue-purple, the multi-layer film is light green or dark purple, and the thicker single-layer film is green (decorative green film). ).
5. IPX7 nitrogen waterproof. For outdoor use, waterproof is very important. In addition, nitrogen is effective to prevent the lens from growing mildew and improve the service life of the product.
Our power Mirror international Optical Equipment factory can supply all kinds of telescopes.
Contact Person: ETTRVISION
Tel: 86-13730890225
