Vivitar CS530 5 x 30 Binocular (Black)

Product Information

In broad daylight, the average adult has a dilated pupil of 3mm. The diameter of a healthy young adult can range be between 2mm to 8mm, and as you get older, it can get reduced to 5-6mm. A smaller exit pupil also makes it harder to center your eye on the image. Your eye needs to be centered exactly over the exit pupil to see. Binoculars are optimized for different uses. This guide will help you understand these instruments a little better so that you can make an informed decision when choosing a pair for yourself. Refer to our best binoculars review to see which we like best and why. Step 1: What Size do You Need

Affordable and reliable at the same time, this pair of binoculars is a smart investment for all outdoor enthusiasts. The unique Porro prism design allows greater depth of field than what you would get with normal roof prism designs. The feature is great for wildlife watching but might not be the best choice for sports events, concerts or birdwatching when you want to see objects from up-close and memorize all their details. Step 2: After opening, take the cotton bud and clean it from inside. You can use a blowing brush too. Depth of Field is how much of your view is still in sharp focus behind and in front of the object. The depth of field increases proportionally with distance. For instance, your depth of field is much greater at 20 yards than it is at 20 feet. Depth of field also decreases as magnification increases. In practice, when an object moves and its distance from you changes. You will have to adjust your focus more often, or if you're looking at two objects, one might be out of focus. Is it possible that there could be some shining beacon of life and hope? Could there be something redeeming about this telescope? Some accessories that could fix these optical problems? Not a chance. 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.Affordable and reliable, the set represents the perfect gift for children and adults alike who want to see objects from afar but still need to practice with various characteristics and functions, including focus. The coated lenses ensure clear, sharp views in almost all lighting conditions so that you can take the binoculars with you at dawn or dusk and enjoy nature’s wonders. The multi-coated lenses deliver clear and sharp views in almost all lighting conditions but you may have trouble seeing clearly at dawn or dusk. There is some chromatic aberration also, which means some of the objects you will be looking at will be covered with a light halo.

I bought the Vivitar Classic 4x30 Binoculars because I plan a trip soon to the Gulf Coast to birdwatch. However, this binocular didn't work for me because the lens is not adjustable. I have had three operations on one of my eyes, thus losing quality of sight in that eye, and I need adjustable lenses in binoculars. You will not have to run to an optics store if you are seeing two objects through your binoculars when there is actually one, because now you can fix their alignment conveniently.Exit Pupil: Magnification and the size of the objective lens determines the size of the exit pupil. You can see the exit pupil by holding the binoculars at arm's length and looking at the eyepiece. That round dot of light is the exit pupil. To compute the exit pupil, you divide the diameter of the objective lens in millimeters by the magnification. For our 8X42 binoculars, we would divide the objective lens 42mm by the magnification 8, or 42/8 for an exit pupil of 5.25. If we look at a pair of compact binoculars, say a pair of 8x25, we would have an exit pupil of 8/25=3.125.

If you will follow the preventive measures I discussed earlier, you will not need any professional help to repair your binos. You will be doing this on your own. #2 Fixing Prisms

Medium-sized binoculars are heavier, sturdier, and provide a higher magnification rate of over 12x. They are mainly used for safaris and birdwatching and offer clearer, crisper images. On the other hand, full-size binoculars are designed for professionals, birds or wildlife enthusiasts, and often come with 20x+ magnification. They are heavier and harder to adjust and, often enough, cannot be handled without a tripod. Excessive use of the focus knob results in friction. If the grease (the lubricant used to ease the movement of screws) fades away with time, you will face trouble in focusing through your binoculars. This problem can be repaired very easily at home (in fact this is the easiest one). The company was founded in 1938 as Ponder and Best by Max Ponder and John Best. Max Ponder headed the sales department, while John Best ran the operations side of the company. Ponder and Best first imported German-made photo equipment. After World War II, the partnership began to import cameras and photographic equipment from Japan. They were instrumental in the introduction of many brands into the American market, including Mamiya/Sekor 35mm cameras, OM-System 35mm equipment, Kobena 8mm movie cameras, Sankyo/Komura wide-angle/telephoto adapter lenses and a full line of photographic darkroom equipment imported from many manufacturers throughout Japan and later Taiwan. They were also the sole U.S. distributor for Olympus products at this time. Ponder and Best were the first to gain acceptance for lenses with interchangeable mounts, allowing customers to use the same lens on different manufacturers' camera bodies. 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 2-in-1 design features a 12x magnification rate, powerful enough for concerts, sports events or birdwatching. You can take pictures or shoot video thanks to the 8 MP camera that delivers still, clear, sharp, and high-quality images. They focus on service, repair and restoration for all Civilian and Military binoculars & scopes They are best known for exceptional work on vintage optics from WWI & WWII. Mountain Optics offers complete service for all types of binoculars, foreign and domestic. Including, but not limited to… Located in Selsey, West Sussex, they are a small British company run by enthusiastic optical technicians that have been working with optical equipment since 1960. You can get these drivers from an optic repair shop (it is better if you buy a full set, you will be needing it in the future too) at very affordable prices.For the money and quality, most non-profits or struggling graduate students with an observational element to their project go with Eagle Optics, the company I feel has set the bar. The other common player we see at this table is Nikon, specifically their "Monarch" model. 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. Optical Repairs has customers in Australia as well as the rest of the world such as the U.K., Canada, USA, South Africa and New Zealand. Next most important thing in binoculars is their prisms. These prisms collimate the images coming from two sides and if they are perfectly aligned, our brain will receive one image. But if alignment in prisms is disturbed, our eyes will have to struggle in seeing one clear image. These Vivitar binoculars 10×25 are designed to capture up-close images of nature, landmarks, sports events, and others, delivering a positive experience whenever spending time outdoors.