astronomical binoculars

Archive for April, 2009

10 Tips When Buying a Binocular

astronomy binoculars review 10 Tips When Buying a Binocular
Arthur Raise asked:

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.

Leica Cameras – Antique

leica binoculars1 Leica Cameras   Antique
Lawrence Bell asked:

Leica Cameras derive their name from a shortening of “Leitz Camera”. While on the staff at the Leitz Wetzlar Factory in 1911, Oskar Barnack set out to create a portable camera. The Wetzlar works dated back to 1849, founded by Carl Kellner, a mathematician and optician, for the purpose of developing lenses and microscopes.

Barnack had begun his career as an engineer at Carl Zeiss lens manufactory at Jena. He actually conceived of the Leica camera design as early as 1905, but for many years the design existed only in his brain. He made a 1914 photo with his ur-Leica, a compact predecessor with a retracting brass lens, that chronicled the coming of World War I. The picture depicts a German soldier posting an early mobilization order from Kaiser Wilhelm.

The result of his work formed the basis for the 35mm camera. Together with the highly-acclaimed lenses developed by Max Berek, the Ernst Leitz Company, located in the small German town of Solms (near Frankfurt), was able to bring the new Leica Camera to the commercial market in the form of the Leica I at a trade show at Leipzig.

When the Leica I was introduced, photographers were accustomed to lugging around suitcase-sized photography paraphernalia. The cameras enclosed used 13 inch by 16 inch plates, rather than the present-day 35mm film on rolls.

Because these portable cameras were so small and lightweight by current standards, Leica cameras were at first perceived as toys for a lady’s purse. That first impression was soon dispelled when the public came to appreciate the stunning images the camera produced and their extreme durability.

Carl Wolff, who bought the company in 1926, is largely credited with expanding the fame of the Leica brand. Leica was also famous for high-quality binoculars, dating back to 1907. Leica camera sales totalled 90,000 by 1932, and a million by 1961.

These rugged cameras were witness to two world wars, often from both sides of the conflict. Not only the Americans, but also the Russians, were fond of the Leica in World War II. The Soviets viewed the Leica as a guilty pleasure, despite its capitalist “fascist” origins. Ironically, many of The Leica family were Jews.

Russian Aleksandr Rodchenko, also a sulptor and a painter, shot many memorable pictures, including the 1934 “Girl with a Leica”. Fellow Russian, Ilya Ehrenburg, created a series of 1930’s images that depict the raw underbelly of France between the World Wars.

In the 1930’s, French painter Henri Cartier-Bresson migrated his art to photography. The means of his transformation was the Leica camera. His often candid black and white photos are among the finest in the illustrious Leica legacy.

The famous Times Square kiss on V-J Day was shot by Alfred Eisenstaedt on a Leica.

Photographers the world over have praised various Leica Cameras, such as the Leica I, Leica M3, Leica M3, and later the Leicaflex SL (its first SLR camera). Enthusiasts have made the brand a cult favorite, to the extent that a Leica Number 107 test market model from 1923 sold in 2007 for a world record price of nearly a half million dollars US.

A Closer Look with Zoom Binoculars

zoom binoculars A Closer Look with Zoom Binoculars

I can remember the last time I went hiking in Yellowstone, I saw this amazing vision in front of me. The trees, the clouds, the rivers and the rock formations was the ideal image of beauty! Anyway, I discovered that me and my buddies were beginning to get sort of lost. We were heading down a trail, but we were unable to see where it was going. Then my buddy Mick brought out a couple zoom binoculars, and I sort of smacked him on the spot for not bringing it out earlier.

Thanks to the zooming capacity of binoculars, I was ready to keep an eye on a mule deer as it kept on chomping whatever plant it was munching on. The capability of zoom binoculars to shift the magnification between distances truly assists in keeping track of something, and enables you to identify things you wouldn’t normally have seen with the ***** eye.

Mick provided the solution by supporting a stand designed particularly for the zoom binoculars. The stability needed was given, and this allowed us to truly crank up the magnification! Heck, the 36x zoom helped me spot the deer twinkling its nose a bit as it sniffed the air!

Anyway, I know what I am going to pack the next time I am going hiking or camping. When you want a flexible technique of enlarging your vision, whether for closer targets or for some serious magnification power, then zoom binoculars is the simplest way to go!

Optical Digital Barska Binoculars Review

digital binocular1 Optical Digital Barska Binoculars Review

The Optical Digital Barska  Binoculars is perfect for taking pictures of sporting events. Now, any binocular cameras can do the job but what sets the Optical Digital Barska Binoculars apart is that it can do the task from afar.

The premium models of this gadget have a pop up LCD screen that gives the user a preview of what they actually see. They can control the zoom feature and take pictures as well as video clips in order for them to document the sights and the action.

Technology is constantly improving. Apparently, developers have explored a dynamic way of taking pictures and videos by instilling these in binoculars. Binoculars and digital cameras are now available as a single unit.

These are engineered with such technical precision that the combination of both the compact digital camera and the powerful pair of binoculars has then given birth to other models. Now, there is a wide range of models to choose from. It is up to the user which features and specs are appropriate for his lifestyle.

The Optical Digital Barska  Binoculars is great for outdoor adventures, sports, and concerts. This is because the gadget can magnify the images and then capture these just as any digital camera would.

The Optical Digital Barska  Binoculars can also save the images and store it in its internal mass. The storing capacity of the storage can store as much as 40 images. It also depends on the resolution of the pictures.

The lower the resolution, the more images stored. These images can easily be downloaded and transferred to the PC.

The Optical Digital Barska  Binoculars come in sleek and stylish designs. Its outside appearance does not jeopardize its capabilities. The multi coated optics of the binoculars result to the superior clarity of the images and the continuous video capability that is hardly found in the other models of digital binoculars that are available in the market today.

The user can also expand the memory of the binoculars by getting a SecureDigital Memory Card. He just has to make sure that this compatible with his model. Some Optical Digital Barska Binoculars models have LCD color screens that flip up so that the user can view the camera images and access the menu.

The user can go for the model of his choice. Whichever Optical Digital Barska Binoculars model he chooses, he is guaranteed to have make an investment with the product simply because this will clearly be worth his money and that’s what counts.

Susan Asked:

can you use regular house mirrors as reflector mirrors for a homemade telescope reflector?

Reply:

ou CANNOT use household mirrors in telescopes.

Household mirrors are flat, whereas telescope reflector mirrors need to be round, so they can reflect the light to the eyepeices.

Charmine Asked:

I bought a pair of binoculars sale at a jumble at the weekend. I assumed that they were just ordinary binoculars but when I got them home I found that they were marked Infrared Minox. They also say9×27x50mm FULLY COATED 75m/1000M AT 9x.
The lenses are reddy orange. I’ve tried looking through them and I can’t see a great deal at night.
I’ve looked on the internet and can only find digital infrared which have a light worked by batteries. These don’t seem to have any batteries or ON/OFF switch.
Does anyone know anything about these?
Are they any good and how do I use them? I want them for looking at birds in my garden during the day really but if I could use them at night that would be a bonus.

Reply:

Hi, These are not night vision binoculars sale. True night vision devices will always need some sort of power source. The 9×27x50 is the designation and means 9 times magnification, zooming to 27 times magnification, with a 50 mm objective lens (the front lens, not the eyepiece). The 75m/1000m at 9x means that at 9 times magnification you will have a field of view of 75 metres when looking at something 1000 metres away. Fully coated means that all glass elements have been coated to reduce reflections and maximise the amount of light captured. Coatings can be various colours, and the red coatings like yours has are usually used to improve visibility when it is a bit hazy and during early evening. The large objective lens will also aid use when light levels are beginning to get low ie early evening. I don’t know about your particular brand, but it sounds as if they will be fine for what you want them for. However, the zoom facility might not be of much use and will probably reduce the light captured and picture quality. For more information visit my website. Hope this helps.

Rowel Asked;

The question reads, “The best place to aim a telescope or the best binoculars on the Moonis among the terminal line- the line between the Moon’s light and dark hemispheres. Why?”

Reply:

You get high contrast near the terminator due to the long shadows. At the edge of light and dark is like sunset. At sunset, the Sun is at the horizon, and your shadow can be quite long.

“the Best binoculars” is a highly subjective word, and should be avoided in school science homework questions. I give the question a grade of B+.

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