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TOPIC: Binoculars


L

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RE: Binoculars
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10 x 50 Binoculars from Lidl Stores
Monday 22nd February, 2010

10x50binoculars.jpg

* Robust rubber casing
* 10x magnification
* Max. field of vision
- Width (m): 114
- Distance (km): 1
* Exceptional viewing due to BaK-4 prisms
* Fully coated objective lenses (mm): 50
* Integrated tripod thread
* Includes storage pouch, neck strap, dust caps, cleaning cloth and instructions
* 13.99

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Edge Sharpness

This is also easy to detect by you and me, the ordinary hunter who does not hold a degree in the physical properties of light. "Sneak" a peek at the outer corners of the view in the glass while holding the glass still (do not pan). Is edge image sharp or fuzzy? Edge sharpness is nice because it brings the entire field of view into a "flat-screen" view, rather than just the centremost section. High quality binoculars show high optical resolution over the entire picture, not just the centre, although the central portion remains most important.
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L

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Astronomical Society of Victoria president Perry Vlahos says anyone interested in starting out in astronomy should not buy a telescope.
He says first school yourself: read, join a club or take a course.
A pair of binoculars will suffice for those starting out.
If you're under the age of 40 invest in a 7x50 pair of binoculars, or if you're over 40 a 10x50.

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Antique Binoculars
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Collecting and Identifying Antique Binoculars
Many collectors of antique binoculars get started because they have a pair of binoculars that have been handed down from one generation to the next.
There are several places to look for antique binoculars. EBay often has several up for auction. They have been found at estate sales. Antique stores will often have a few pairs. People have been known to find them at flea markets and yard sales.

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Ed ~ A word of caution is needed here. Generally antique binoculars are uncoated, have low light transmission, have narrow fields of view, and probably misaligned; and so are unsuitable for general astronomy work.

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L

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RE: Binoculars
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L

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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.

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Ed ~ Generally, for astronomy you will need low powered, large aperture, binoculars.

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L

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Bushnell Marine 7x50 Binocular

* Ideal for Astronomy
* Waterproof, fogproof, and fully multi-coated lens
* Illuminated internal compass
* Porro Prism System
* BaK-4 porro prisms
* Magnification: 7x
* Objective lens: 50mm
* Field of view at 1,000 yards: 350 feet
* Price: $132.88


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Bushnell Perma Focus 7x50 Wide Angle Binocular

* Ideal for Astronomy
* Fully coated optics for superior light transmission and brightness
* Unique focus-free feature stays in focus at most viewing distances
* Non-slip rubber armour absorbs shock while providing a firm grip
* Magnification: 7x
* Objective lens: 50mm
* Price: $49.99


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L

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Cabela's 20x80 binoculars
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Cabela's 20x80 Rubber Armoured Astronomical Binoculars

Our Astronomical Terrestrial Binoculars are perfect to use instead of a spotting scope. These binoculars offer field of view equal to spotting scopes, but cause less eye fatigue because you are able to use both eyes. We recommend you use a rest or tripod for steady viewing. Each is drilled to accept a tripod adapter. You get great viewing power from these 20 x 80 power binoculars, with a field of vision at 1,000 yards of 157 feet. A tripod adapter also is available.
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L

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Bresser 10x25 Binoculars

* Compact binoculars
* Magnification: 10x
* Objective lens size (mm): 25
* Fully coated lenses
* Includes pouch, cleaning cloth and neck strap
* Weight (g): 214
* Price 5.99

These binoculars are available from Lidl stores from Monday 31st August, 2009.

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L

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Brainwave Assisted Binoculars
The Defence Advanced Research Projects Agency (DARPA) awarded more than $10 million to defence contractors working on intelligent binoculars (not pictured) that utilise the users brainwaves to filter relevant visual information. While details of the project are obviously hazy, the developing technology hopes to capitalise on the unparalleled ability of the human brain to differentiate between battlefield objects and movement.

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