Three primary classified optical telescopes include Refractor, Reflector, and Catadioptric designs, and the Monocular Telescope comes under Refractor. This telescope helps in magnifying the images which are in the distance. The photos get magnified as the light passes through a series of lenses and prisms. The presence of prisms makes the telescope lightweight and hence easy to use.
These Monocular Telescopes are preferred over Binoculars as both having similar optical properties, Monocular weighs half less than Binoculars and is also less expensive. Binoculars produce 3-dimensional images, whereas Monocular provides 2-dimensional images. Monocular is mostly suited for ‘one-eye-vision,’ preferred for carrying less weight, helpful for reduced vision, or visually impaired people. Monocular is usually applicable in hiking, natural history, hunting, marine, and military. Because of its ‘Pocket-size’, it is also called ‘pocket-scope’.
Sizes of Monocular magnification
The two specifications on which a Monocular Telescope depends are
- Objective lens diameter
Let’s assume that the given range is 8×30, then 8 is the magnification, which means it will magnify the distant image eight times larger at the eye. 30 is the objective lens diameter, which will be in millimeters (mm).
To Further, magnify the image up to 10× or 12×, the user will be required to hold the Monocular steadily. Although this extent of magnification will affect the brightness and field area of the distant object, it will undoubtedly more extensive the field area making it easier to locate distant objects.
Designing of Monocular Telescope
Overall the basic designing of the Monocular Telescope is similar to Binoculars. Still, it is obvious to differentiate these two at some parameters:
- Exit pupil: It is the diameter of the objective lens, which is then divided by the magnification and denoted in millimeters. A right combination of the large objective lens and low magnification will result in an appropriate light presence, which means that the higher the exit pupil, the better light will be transmitted. It is essential to keep in mind that the exit pupil of the instrument should not be more significant than human eye pupil as it would be of no advantage then.
- Prism type, Porro or roof: Porro prism Monocular has an objective lens tube that offsets from the eyepieces, whereas Roof prism Monocular has a straight machine, which makes it more compact and small.
- Lens coating and Prism coating: It highly depends on the quality of the surface because the layer affects the image brightness and light transmission in major specifications and is also expensive.
- Focusing mechanism: This is the most common and essential feature of any telescope. The focusing mechanism is also one of the significant differences between Monocular and Binocular. Binoculars use a central wheel focusing system, which simultaneously applies on both sides. Monocular provides a variety of focusing mechanisms, some of which have a large knurled focusing ring around the body or a small focusing ring close to the eyepiece. Some of them have a small focusing lever or a sliding focus button on it.
This Monocular Telescope is of the brand’ maifeng’. It has a magnification of 6× and dual focus mechanism. It is waterproof, fog-proof, and has excellent comparability with any smartphone and camera.