Objective and diameter of the object: The combination of these two numbers, such as 1.5, indicates an magnification (2 times) and an object lens diameter (1 mm). Higher magnification shows more details; But it may reduce the field of view and vibrate image.
Field of vision: The wider the field of view, the more space you can see at a glance. This feature is important for birdwatching and tracking moving subjects.
Weight and Dimensions: Light and compact cameras are easier to transport; But heavier models usually have better optical quality and require tripods for prolonged use.
The Type of Prism: Purro models have better resolution and depth of field, while roof cameras are more intensive and more resistant to hard conditions.
Waterproof and fog: If you are planning to use in adverse weather conditions or humid environments, it is best to choose a model with waterproof and nitrogen gas to prevent lens fog.
The quality of the lens coating: Multi -layer lenses absorb more light and have higher clarity and transparency, while cheaper models may create optical reflections.
Image Stabilizer: For the above magnification, select models with an anti -earthquake system.
Eye comfort distance: If you wear glasses, choose a proper eye distance (at least 1 mm) to use it without problems.
Price and Brand: Authentic brands such as Nikon, Swaroski and Vertex offer higher quality; But more economical models such as Celestron are also good options.
Accessories: Some models have bags, necklaces, lens protective and tripods, which can be easier to use and extend the life of the camera.
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