Hello and welcome back, let's move on to the binoculars ：What-is-important-to-binoculars?

5. Nearest observation distance: Bird watchers usually want to have a small closest observation distance in order to observe birds hidden in bushes or grass.

6. Focusing type: When observing forest birds, the distance between the bird and the person is suddenly far and near. Only with central focusing can it adapt to the rapid changes in the distance of the observed object. As for the left and right focusing Paul prism binoculars (such as telescopes), the focusing speed is very slow, not suitable for observing fast-moving birds

7. Waterproof and shockproof: Bird watching activities are often carried out outdoors, and the observation environment is changeable. It is best to choose water-proof binoculars, so as to keep the inside of the mirror sealed and dry, without fog and mildew, and improve the use of the telescope. 

8. Coating: For Paul prisms, only anti-reflection coating is enough. For roof prisms, reflective coatings are necessary. To obtain good results, in addition to anti-reflection coatings, phase coatings are also required.

9. Eye mask and exit pupil distance: For birders with myopia/aging eyes/astigmatism, bird watching is different from watching the scenery on the balcony. When watching the balcony, you can take off the glasses and slowly adjust the focus, while bird watching is often worn first. After the glasses search for the bird, use the binoculars to observe directly.

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