Celestron UpClose 20×50 Porro Binocular
Model Overview: This UpClose 20×50 Porro Binocular (71144) is from the experienced maker of optical products and are professionals in magnifying every thing on earth and sky. Introduced under the series of ‘Upclose’ the brand ensures advanced challenges at the economically price tag. Under this, series consist of five models of which one comes with the zoom functions. With all the benefits of upgraded construction and feature rich, these models take the advantage of enhanced durability and stylish appearance. The following is the review of this model.
Physical Characteristics: Celestron UpClose 20×50 Porro Binocular comes with the black colour body that has rubber armouring. These models under the upclose series consists of large center focus knob that offers smooth and accurate focusing. It does come with the tripod adapter thread that makes it compatible with the tripod operations. The eyepiece and the objective lens are also perfect in its quality and performance. This 878.84 grams weighing binocular is definitely easy to carry and is a handy model. All the power of magnification can go along with the user for any time access without the burden of its weight.
Prism type and optical design: This Celestron Binocular comes with the Porro Prism that are been designed with the BK-7 optics. This type is highly economical and proves to be effective, it helps in transmitting the invert images in the right side up with the perfect light gathering and produces sharp and well-defined images.
Magnification and Aperture: Well known is the fact that the degree of magnification and the enlarged vision of the far off objects purely depends on the magnification ability of the device. Celestron UpClose 20×50 Fully Coated Optics Binocular offers a large magnification of 20 times to the naked eyes. This is quiet big that it can offer a professional use for many fields that include birding, sports, concert etc. Well, when the aperture is considered it measures 50mm. The objective lens diameter is quite large that it performs in better light gathering ability making the objects clearer and hence it suits best for the activities like scenic observation and sports.
Focus: With the central focus system, it offers a linear field of view at the distance of 1000 yards as 168 feet or 51.21m. In case of the close focus, it is 10.97m or 36 feet. The close focus is however not impressive as the models with the lower technical seem to offer better close focus.
Other technical aspects: Much similar to the aperture is the exit pupil that is been found in the center of the objective lens diameter. This again functions to gather better light and it measures 2.5mm. The eye relief of Celestron UpClose 20×50 Waterproof Binocular is 7 mm that is low to comfort the spectacle wearers.
Warranty: Celestron offers a no-fault lifetime warranty for this binocular.
Verdict: This Porro Prism Binocular model is best suited for the applications like Sporting events, Birding, wildlife observation, hiking, scenic nature walk and concerts. The weather shield that makes it suitable for the extreme weather conditions is an impressive one. It is not very comfortable for the eyeglass wearers. Sometimes focusing may be time consuming and difficult to fix but it finally gets to go positive.
Check other Porro Prism Binoculars in this website.
Celestron UpClose 20×50 Porro Binocular 71144 - Technical Specification Table
| Manufacturer | Celestron |
| Model Name | UpClose 20×50 Porro Binocular |
| Product Code | 71144 |
| Prism Type | Porro |
| Magnification | 20x |
| Diameter of Objective Lens | 50 mm |
| Exit Pupil | 2.5 mm |
| Eye Relief | 7 mm |
| Field of view (at 1000 meters or yards) | 51.21 m |
| Optics type | BK - 7 |
| Optical Coating | Fully coated |
| Near focus | 36 feet / 10.97m |
| Angle of view | 3.2 degree |
| Weather proof / armouring | Weather resistant / Rubber armouring |
| Area of applications | Sporting events, Birding, wildlife observation, hiking, scenic nature walk and concerts |
| Weight | 878.84 grams |
| Tripod adaptability | Yes |
| Warranty | No-fault lifetime |
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