| Spotting scope is an instrument for viewing the | | | | catadioptric type. In the refractor type, it uses |
| terrestrial objects. It has the functions similar to | | | | glass to bring light; it is durable, low in |
| the telescope but with a portable and easy to | | | | maintenance, simple design, has shorter focal |
| carry design. They are better compared to the | | | | length and is less expensive. In the catadioptric |
| binoculars and it lies in between the binocular and | | | | type it uses mirrors, has long focal length, the |
| the telescope. With regard to the cost and the | | | | magnification power is more, it is sensitive and is |
| functions, also it is the same standing ahead of | | | | good for the long distance viewing. |
| the binocular and less than the telescope. They | | | | There are also eyepieces that can be attached |
| are mostly used for birding and nature | | | | which increase the performance of the spotting |
| observation. It can also be used to view the night | | | | scope. It comes in different power and the user |
| sky but is limited to the moon and the stars | | | | can easily interchange them depending on the |
| found in the sky. When more specific details in the | | | | situation. There are also zoom eyepieces and they |
| sky are required, this instrument does not support | | | | are used to see the detail of the viewing images. |
| and a telescope has to be used. | | | | The design of the spotting scope can be handy |
| The technical aspect of the spotting scope is | | | | and many of them have rubber outer covering |
| many to discuss. First is the magnification that | | | | that makes it waterproof. With the nitrogen gas |
| suggests the uses of the instrument. In the | | | | filling it becomes fog proof. There is a knob for |
| normal case when the field of view is small, the | | | | the focus control that can be adjusted easily. It |
| magnification is high. The range of magnification | | | | also can be used with the tripod for more |
| with the spotting scope is 15 - 60x. The lens also | | | | convenient viewing. In short, the three types of |
| is found in many types. The size of the lens | | | | cope are the straight through scope, angled scope |
| diameter depends on the magnification power | | | | and the shoulder-mounted scope that has |
| when the magnification is high the lens size is also | | | | different benefits and for the same magnification |
| bigger. This aperture varies from 50 to 80mm. | | | | purpose. |
| The types of optical lens are refractor and | | | | |