Bird watching telescopes can be roughly divided into two types: binoculars and monoculars. Binoculars are mostly 7~10 times, suitable for hand-held viewing of relatively close birds, and are an essential "weapon” for every bird-watching enthusiast. Most of the monoculars are 20-60 times larger, which is suitable for watching long-distance and relatively slow-moving birds. In addition, the monocular needs to be used with a tripod, usually about 6 people can use one.
I have been buying binoculars. Binoculars can be simply divided into two types: Porro type and roof type. Porro type telescope: simple structure, easy to process, but bulky and heavy. Roof type telescope: small size, relatively light, but difficult to process, the price is higher than that of the porro type.
We often see numbers such as 8*42 or 10*42 in binoculars, where 8 or 10 is the magnification of the telescope eyepiece, and 42 is the aperture of the objective lens. What is the magnification? Simply put, magnification is the number of times the object is brought closer. For example: a target 700 meters away, if viewed with a 7x magnification telescope, it presents a scene equivalent to a distance of 100 meters in front of the naked eye.
Tips: Binoculars usually choose 7-10 times. When the magnification exceeds 12 times, due to the shaking of the hand, the image will be unstable and the observation will be uncomfortable. Therefore, a tripod is required to support it, which will lose the greatest effect of binoculars: flexibility.
If you want to buy binoculars, if it is for general field observation enthusiasts, you can choose the TONTUBE practical series of the telescope brand, which is cost-effective and of good quality. As for specializing in this field, relying on these guys to eat, it is essential to develop a set of advanced professional telescopes. You can choose the high-end series of TONTUBE, which is specially designed for professional personnel.
Finally, how to maintain and maintain your outdoor bird binoculars: The ideal way to store binoculars is in a dry and cool place, i.e. in an environment with relatively constant temperature and humidity.
1. Dry conditions are important
When water vapor condenses on the glass surface, fog forms on the inside of the eyepiece. Therefore, it is important to keep the telescope in a dry place (ideally the humidity should be low).
2. Temperature fluctuations to avoid
Also, it is important that there are no temperature fluctuations in specific areas (the main cause of fog). While most high-quality telescopes are fog-proof and water-resistant because the inside is filled with anti-fog gas, there is still a chance that fog will form on the glass surface if the telescope is stored in an area with frequent temperature fluctuations over an extended period of time.
3. Close the lens cap
But before saving, you need to cover the lens cap and put it in a box to prevent damage. Also, eyepieces can pick up a lot of dust, so it's best to store them at room temperature with a rain cover or lens cap.
4. Desiccant helps a lot
To remove excess moisture gas, the best desiccant is silica gel, a type of silica that absorbs up to one-third of the weight of water. Silicone is purchased in pouches and can be placed inside the telescope case.