Archive for February, 2009

10 Tips When Buying a Binocular

The term binocular covers a whole range of optics, binoculars, spotting scopes, night vision goggles, and so on. So before you even think of buying a binocular you need to find out what you need and what you are going to use it for. Binoculars are used by people in operas, while hunting, in war, for bird watching, and in astronomy. For astronomy and bird watching you will need high powered binoculars while for other uses you could even consider compact binoculars which weigh little.

The joy of watching things up close cannot be described; you will be able to see every small detail clearly as though you are within touching distance. When buying a pair you must think of quality, long lasting, good grip, ideal weight, and lens power. Before you buy ask about what kind of prism and lens the binocular has, plastic lenses are more expensive than glass and often have coatings that enable you to see even in low light conditions. The functionality of a binocular depends on factors like lens size and quality prism quality; lens coatings; adjustable and easy to use settings.

Here are a few thoughts:

1. Know your need. Read all about binoculars their power and uses.

2. Determine how often you will use a pair and what its cost is. Think about it should you spend valuable dollars to satisfy a whim and then let the pair reside in your cupboard?

3. Surf the internet and make a study of the different brands. There are so many options available; Canon, Bushnell, Nikon, Steiner, Leupold, Olympus, Meade, Vanguard, and more. Weigh the pros and cons of each kind and read unbiased reviews.

4. Always make the effort of taking a survey. Comparison shopping is a mantra that is being followed world wide. Get quotes from different sites.

5. Check out auction sites too. Very often designer glasses are sold for almost a pittance at auctions. Here you could even buy a second hand binocular.

6. If you have patience then wait for off season sales this is when binoculars are sold at discounted prices.

7. Always check what the lens specifications are and about warrantees.

8. Since binoculars are specialized items it is best you buy from online stores that specialize in binoculars. Only specialists will be able to answer your questions and guide you on what kind of binoculars would be ideal for your needs.

9. Be sure to ask about whether the pair you are buying are waterproof and also whether they can be use at night. Only a few models have night vision capabilities.

10. While purchasing online be sure to check payment gateway securities and shipping time. Find out where the binoculars will be shipped from and also about what happens if there is breakage in transit.

According to experts the most common tip is to buy the most expensive binocular you can afford.

 

logo 10 Tips When Buying a Binocular
3x25 Opera Theater Glasses Brass Binoculars Red and Bla
3x25 Opera Theater Glasses Brass Binoculars Red and Bla
Paypal   US $9.99
3x25 Opera Theater Glasses Brass Binoculars Coated Lens
3x25 Opera Theater Glasses Brass Binoculars Coated Lens
Paypal   US $8.99
3x25Classic Opera TheaterCoated lens Glasses Binoculars
3x25Classic Opera TheaterCoated lens Glasses Binoculars
Paypal   US $9.99
3x28 Opera Theater Glasses Brass Binoculars Coated Lens
3x28 Opera Theater Glasses Brass Binoculars Coated Lens
Paypal   US $9.18
GORGEOUS Mother Of Pearl OPERA GLASSES Binoculars
GORGEOUS Mother Of Pearl OPERA GLASSES Binoculars
Paypal   US $22.95
EAGLE EYE 35 Opera Theatre GLASSES Collapse Binoculars
EAGLE EYE 35 Opera Theatre GLASSES Collapse Binoculars
Paypal   US $19.00

Wallace asked:

And also how many times more light does it gather?

Reply:

Seven times the diameter means 49 times the area, which means 49 times the light gathering ability. Seven times the diameter also means seven times the angular resolution.

 

logo How many times better is the angular resolution of 50mm binoculars compared to the 7mm wide eye opening?
Vintage ELITE Pocket OPERA GLASSES Folding Binoculars
Vintage ELITE Pocket OPERA GLASSES Folding Binoculars
Paypal   US $4.99
Antique Mother of Pearl Opera Glasses Binoculars France
Antique Mother of Pearl Opera Glasses Binoculars France
Paypal   US $59.72
RARE ANTIQUE REPOUSSE OPERA GLASSES BINOCULARS ANGELS
RARE ANTIQUE REPOUSSE OPERA GLASSES BINOCULARS ANGELS
Paypal   US $49.99
Erwin asked:
Can you give me any information about Roof Prism Binoculars, like for example, how it is built and designed ?
Reply:
Roof prisms are an alternative design to Porro prism pair binoculars. In both cases, multiple reflections serve to deliver an image that is neither upside down nor left-right reversed. A roof prism requires a longer optical path through a dielectric (the material of the prism) and more reflections, so, all things being equal in terms of material quality, produces a fainter, more chromatically aberrated image. The optics also require a greater precision. In general, roof prism optics are far more expensive to produce the same performance as a good ol' Porro prism pair set of binocs, and of course if you use the best materials for both, the roof prism will not perform as well for the same cost.

Another advantage of the Porro setup is the input polarization state of the light is preserved. The advantage of the roof prism is that the design is more compact and potentially lighter.

You can follow the links below to get a very cursory look at how these two designs work in binoculars. If you hunt for searches on just "roof prisms" and "porro prisms" you will probably find more info on how these specific optical elements are designed.

Source(s):

 

logo Can you give me any information about Roof Prism Binoculars, like for example, how it is built and designed ?
Chevalier Paris Opera glasses binoculars
Chevalier Paris Opera glasses binoculars
Paypal   US $.99
Binoculars Focal Folding opera Glass
Binoculars Focal Folding opera Glass
Paypal   US $2.99
Vtg Antique OPERA GLASSES Binoculars Parts Eyepieces
Vtg Antique OPERA GLASSES Binoculars Parts Eyepieces
Paypal   US $3.99

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