Posted 20 hours ago

Vivitar CS530 5 x 30 Binocular (Black)

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Vivitar Series 1 7mm ƒ/3.5 Fish-eye CS (for APS-C digital sensors only, a rebadged Samyang 8mm ƒ/3.5 from 2009) Knowing your terminology is important, so let's go over a few things you should know. The first thing you're going to see is some numbers like this: 8X42. The first number is the magnification; the second number is the objective lens size. We will talk about these two items first.

The product should be soft and dry to not cause marks or fine scratches when cleaning the lenses. You should also avoid cleaning substances or wipes such as Kleenex as they might leave fine marks and scratches on the lenses, which might interfere with the image quality.

8 Best Vivitar Binoculars (Updated Reviews) in 2023

Twilight factor is computed by multiplying the objective lens diameter by the magnification and then taking the square root of this product. Thus an 8x42mm binocular has a product of 336 (8x42=336). The square root of this is 18.33 (√336=18.33). This number may seem reasonable when comparing an 8x42 pair of binoculars with a twilight factor of 18.33 with an 8x25 pair with a twilight factor of 14.14. The twilight factor really only comes to play when looking for binoculars to use during twilight or for astronomy. Again, this formula also doesn't consider the optical quality that has a tremendous impact on the perceived brightness of the optics. Lens quality was enhanced over time, and eventually, the achromatic telescope was introduced in 1758, allowing for correction of the false-color fringes by using two pieces of glass of different compositions, which brings two wavelengths of light into focus at the same point. This also allowed telescopes to shorten in length from a focal ratio of 25-100 to perhaps 5-15. Ever since the introduction of the Achromat (meaning no-false-color), virtually every affordable refractor telescope has used this principle, from high-quality planetary telescopes to department store refractors to binoculars to certain kinds of astrophotography telescopes. When you buy a cheap refractor telescope, even a very poor one, you can be fairly certain that you’ve got an achromatic doublet at the front.

Objective lenses of 28mm are generally considered compact. Bins of this size often weigh well under a pound. However, you often make significant low-light performance sacrifices when moving to a lens of this size, meaning poor lighting conditions can result in silhouetted images with very little color detail. Focusing: Ease of focusing is an important factor to consider when choosing a pair of binoculars. When evaluating focusing, most binoculars use a central focusing knob that you turn while looking through the optic. Getting the sharpest focus possible may require very fine adjustment. This can be done in several ways. You can increase the number of revolutions that it takes to focus, making the adjustment finer. This slows down the focusing process. Extra time needed to focus can mean the difference between getting a good view of a moving object or not. This guide was to acquaint you with how to repair binoculars at home. And I am pretty much sure I have been successful in doing so. The minimum focus is powerful and close enough to allow you to see a butterfly in detail without forcing your eyes and hurting it. Mountain Optics has been specializing in repair, service and superior restoration of binoculars, scopes as well as other optics since 1986.If your lenses have moved away from their original spot and you are facing trouble during the focusing process, you can easily repair it at your home. You will also receive an instructions manual to help you familiarize yourself with the features and functions of this 2-in-1 tech piece. Unless you are really attached to a pair of binoculars (which I can totally understand), or if they were a cheap pair to begin with, it is sometimes just not worth having them repaired or serviced. If this is the case then it is time to get yourself a new pair of optics. The Moon is dim and blurry and I cannot overstate how much false color it has–I’m not even sure my simulation does it justice. It’s bad. Chromatic aberration seems to be one of the negative aspects of this affordable eyepiece as it won’t allow you to clearly see images if they are close to a powerful light source.

The multi-layer anti-reflective lens coating reduces glare and chromatic aberration, a problem that many other Vivitar binoculars seem to be dealing with. As a result, the images you’ll see are clearer. The lenses are the most delicate and significant part of binoculars. Also, these are the most exposed ones. Whenever your binoculars fall or are hit by the sandstorm, lenses bear the most damage. To prevent your lenses from getting destroyed you should know about these precautionary measures first.It is delivered with a full set of useful accessories, including a cleansing cloth, a shoulder strap, and a carrying case to protect the binoculars from scratches, rain, dust, debris, and stains. Although you would be inclined to opt for a higher magnification rate, keep in mind that products with over 12x are heavier and harder to manage without a tripod. The best binoculars for daily outdoor activities such as birdwatching, sports events, concerts or watching wildlife should have a 7x-12x magnification rate.

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