astronomical binoculars

Archive for February, 2009

Meade Telescopes Compared With Other Telescopes

celestron telescopes Meade Telescopes Compared With Other Telescopes
Kozsun Huseyin asked:

ooking to buy a telescope? There are several big brands to choose from. Meade telescopes being the worlds largest, and Orion telescope, Celestron telescopes, and many others. In this article, we will compare Meade telescopes to other telescope brands, to find which the best telescope to buy is.

As you read this article, you will discover more about:

* About Meade Telescopes

* Why Buy Meade Telescopes

* Meade Telescopes Compared With Other Telescope Brands

* About Meade Telescopes

Meade telescopes come from a company called – Meade Instruments Corporation. In 1972, John Diebel started Meade as a small mail order telescope seller. They used to sell small reflecting telescopes and telescope accessories.

In 1978 the company started producing Schmidt-Cassegrain telescopes. Meade Instruments Corporation has also produced larger telescopes, which can even be found in some observatories! Today Meade is the leading telescope manufacturer, with its telescopes being found all around the world.

* Why Buy Meade Telescopes

There are many reasons to invest in Meade, when buying telescopes. The biggest reason is the amount of telescopes that are from Meade. This makes finding answers to questions and accessories which fit your telescope, much easier.

There is a wide selection of telescopes from Meade telescopes. And they all are designed to offer good viewing of the heavens.

The price point with Meade telescopes is also good. Telescopes from Meade do have a part premium, because of the brand, but compared with other brands, the price point is similar.

* Meade Telescopes Compared With Other Telescope Brands

Meade telescopes are not the only brand for telescopes; there are some other great ones. Celestron telescopes produce great telescopes, and at one time, were bigger and better than Meade.

Meade telescopes come in many varieties, such as GPS computer controlled telescopes, whereas standard reflectors and refractors. Also Meade has a line of new generation equipment that lets you point to the heavens on an object, and learn in vast detail, information about it. Celestron has also followed suit.

Meade and Celestron telescopes offer similar products, at similar prices. Orion is good with price. Which brand you choose will come down to your own likes and dislikes. When buying a telescope, look at which offers the better deal. Sometimes you can get extras such as a carry case or telescope lenses.

For a telescope which will last for years, Meade and Celestron offer good quality, and their telescopes have many good customer testimonials. The ultimate key being to be able to find these great telescopes.

Luckily there are many places that sell both Meade and Celestron telescopes. Online it can be easier to find a wider range. Make sure you check both models between brands, and see the differences they each offer, and the extra features or accessories you get.

Choosing Hunting Binoculars

zoom binoculars1 Choosing Hunting Binoculars
Richard A. Baker asked:

It’s hard to track game if you can’t see it. Therefore, one of the most important accessories for hunters is a good pair of binoculars.

While there are literally thousands of different models of binoculars on the market, not all are suitable for hunting. Most are not rugged enough for the woods, marsh or field. Many are not suitable for low-light conditions. Some are too powerful, and others not powerful enough.

Here are some factors you should consider when choosing hunting binoculars.

Binocular Construction:

Hunting is a rugged sport that puts demands on your equipment, including your binoculars.

Hunting binoculars should feature some sort of rubberized exterior armoring to protect them from being damaged if dropped or bumped against trees, brush, rocks and so on.

Because you’ll likely be hunting in extreme weather conditions, you’ll want a pair of binoculars that can withstand such conditions. They should be waterproof, and the lenses should be fog-proof. Another feature to consider are the lens caps. Binoculars with attached caps will protect the lenses, but not require you to fumble in your pockets looking for lens caps if it starts to rain or snow.

Roof prism binoculars are popular with hunters. Light enters the front (objective) lenses, and is then redirected through the roof prism to the rear (ocular) lenses. The roof prism design allows the binoculars to be more compact than binoculars that transmit the light directly from the objective lenses to the ocular lenses.

Binocular Lenses:

When it comes to lenses, bigger is indeed better. The larger the objective lens, the more light the lens transmits to your eyes. If you like to hunt at dawn or dusk, you’ll want the largest objective lenses you can get. The objective lens size is the second number in the manufacturer’s description of the binoculars. For example, 10×42 binoculars have 42 millimeter objective lenses. Objective lenses for hunting binoculars range from 40 millimeters to over 60 millimeters in diameter. Again, bigger is usually better.

When choosing hunting binoculars, look for phase corrected lenses. Phase correction is a coating on the lenses that increases the sharpness, contrast and color saturation. When you’re trying to spot game that blends in with its surroundings, you need every edge you can get.

Another feature to look for in hunting binoculars is nitrogen-filled optics. The nitrogen inside the binoculars displaces oxygen, so that moisture cannot form inside the optics, fogging the interior lenses.

The rear (ocular) lenses are another thing to consider when choosing hunting binoculars. If you’re like most people, your eyes aren’t identical when it comes to focus. Therefore, you’ll want to look for binoculars that allow each ocular lens to be adjustable for focus.

Consider, too, the amount of eye relief the binoculars feature. This is the distance from the lens to your eye at which you can still see the view. If you wear prescription glasses or sunglasses while hunting, you’ll need some eye relief. Also, binoculars with good eye relief allow you to bring them up to your eyes quickly, without having to get your eyes perfectly aligned. 15 to 20 millimeters of eye relief is generally considered optimum.

Binocular Magnification:

The first number in the manufacturer’s description of binoculars is the magnification. A pair of 8×42 binoculars magnifies the view by eight times.

For long-distance hunting, such as prairie dog hunting, a high magnification may be desirable. But for most types of wood/field/marsh hunting, too much magnification is undesirable. You’ll be viewing too small a portion of the area you’re scouting.

8x or 10x magnification is generally considered ideal for most hunting applications.

Many manufacturers offer zoom binoculars, which allow you to vary the magnification. In practice, though, zoom binoculars aren’t always ideal for hunting. They tend to be more fragile and weigh more than fixed-magnification binoculars. Also, as mentioned previously, high magnifications restrict your view of an area.

The amount of area binoculars allow you to view is called the “field of view.” The field of view (FOV) is referred to in degrees, or in feet at a specified distance. For example, 6 degrees of field of view is common. Expressed in feet, a pair of binoculars with 6 degrees field of view will allow you to see 314 feet of area at 1,000 yards.

Other things to consider when choosing hunting binoculars:

Weight is a consideration for any hunting equipment, including binoculars. 32 ounces may not sound like a lot of weight but, after a full day in the field, it will feel like it. Most binoculars made for hunting weigh around 20 ounces.

When selecting your binoculars, pay attention to the warranty the manufacturer offers. You’re going to be exposing your binoculars to some pretty rough treatment, so you’ll want the best warranty you can get. Many manufacturers offer warranties that last twenty years or more. Some even offer lifetime warrantees.

Properly cared for, a good pair of binoculars will serve you for decades. When you consider the cost of a single hunting trip, quality $300 to $500 binoculars are a great investment.

astronomy eyepiece1 Astronomy binoculars: Build Your Own Telescope for Inexpensive Family Fun

Astronomy binoculars  is thought of as something nerds do or those hidden away in towers with big telescopes and mysterious computations. However, you don’t need to be good at math a nerd or spend a long time learning to discover the stars. The ancients did that and learned a lot about their world that way. Given these times when money issues are foremost, it’s nice to know that there are simple things we can do to enjoy our world and learn more about it without having to spend a lot of money or do things that are too complicated to enjoy after all. It’s possible to have fun in your backyard with a little instruction and time, then get other folks around with you to enjoy it too.

We read how folks discover new planets and wax eloquently over stars and their speed, direction and relationship to one another. How many of us know that you can actually build your own telescope to appreciate those heavenly lights in the skies, those stars above us. That might even be a whole lot more interesting than watching the stars in other areas, those in television and the movies or in politics, those Bill Clintons, Sarah Palins, and Paris Hiltons, that all fade in time. Those stars in heaven won’t.

Joey Matheson in the town of Natchitoches, is a talented man, a retired clown from major circuses, who does odds and ends at a local church and teaches people how to build telescopes and enjoy looking at the stars. He is a Bible scholar also along with being an amateur astronomer, so in his own way he balances science and religion. Recently I spent some time with Joey as he explained the elements of the telescope. Looking at the heavens up close in the evening sky can be fulfilling and informative. Joey is not only adept with the telescope, he is also a master at explaining how it is used.

John Dobson, working in a monastery in San Francisco in the 1960’s, wanted to develop a telescope design that would be relatively easy to use. Joey has this type, which is called the Dobsonian telescope. The telescope originated with Isaac Newton. It consists of an eyepiece in the back, a secondary cage and mirror box. One looks through the eyepiece and sees the images that are brought through light that comes in and is reflected by a large mirror. Joey’s telescope is made for deep sky observing, for looking at galaxies, asteroids, and pinpointing stars. Through it one is able to see 18,000 galaxies.

The telescope helps one establish direction, iis used for navigational purposes and to establish the seasons for planting. Joey tells us that the telescope gives him certitude and understanding that there’s a purpose for everything in the relationship of one thing to another, in the earth and in the heavens. It has practical purposes as well as esoteric ones.

There are simple instructions the Internet for building telescopes and networks of people to talk with about them. Astronomy binoculars clubs are great groups to join because these folks are interested in nature and the heavens and like Joey see that purpose for everything under heaven.

About Coated Lense Binoculars

pentax binocular About Coated Lense Binoculars
Terry Ross asked:

Binoculars consist of numerous air to glass surfaces with each individual surface contributing to the loss of light. Coated lense binoculars help prevent the loss of light with one or more of the surfaces being coated with one or more layers of anti-reflective coating. Never buy binoculars with uncoated lenses, the lack of coating means that around 50% of light could be lost making non coated lense binoculars half as bright as their coated counterparts.

Coated lense binoculars used to come with a hefty price tag but now most binoculars come with coated lenses in one form or another and top quality fully multi-coated lense binoculars are often within the price range of many users.

The greater the number of coatings and the more surfaces that are coated the less light is lost so if you are looking for the best binoculars you want fully multi-coated lenses.

There are basically four grades of coated lense binoculars although some manufacturers have developed their own, exclusive, high quality coatings which offer greater durability and further improved light transmission with other added advantages:

• Coated lense binoculars means that one or more surfaces are coated with one layer of anti-reflective coating. If only one or a limited number of air to glass surfaces are coated such binoculars will provide you little more light transmission than un-coated lense binoculars.

• Fully coated lense binoculars means that air to glass surfaces are coated with one layer of anti-reflective coating.

• Multi coated lense binoculars means that one or more air to glass surfaces are coated with multiple layers of anti-reflective coating. Like coated lense binoculars you have to be careful here as just one surface could be coated!

• Fully multi coated lense binoculars are the best that you can buy. All air to glass surfaces are coated in multiple layers of anti reflective coating.

Fully coated lense binoculars can increase light transmission from 50% to around 80 – 85% which is now the norm for low cost binoculars. If you want something a bit more special that will increase light transmission to 95% or above then you want to go for fully multi coated lense binoculars and, for extra durability and advance quality viewing, take a look at the exclusive coatings offered by some of the top manufacturers. Bushnell Elite binoculars come with Bushnell’s exclusive XTR technology (60 layers of coatings on each prism) which delivers 99.73% light transmission per lense.

The difference between fully coated lense binoculars and fully multi coated might not sound that great but once you have owned binoculars with the best quality optics and coatings you’ll never look back. The light transmission, resolution and clarity of top quality binoculars is amazing and the enhanced viewing generally makes the higher price tag well worth it.

A few fully multi coated lense binoculars are Bushnell Elite, Bushnell Legend Binoculars, Bushnell Natureview, Pentax DCF SP / XP and HR II, Pentax PCF Binoculars, Nikon HG L DCF Binoculars and Olympus EXPS I Series Binoculars.

Question about Mars Astronomy?

Sonic Asked:

To an observer on Earth, through what angle will Mars astronomy appear to move relative to the stars over the course of 24 hours when the two planets are at closest approach? Assume for simplicity that Earth and Mars move on circular orbits of radii 1.0 AU and 1.5 AU, respectively, in exactly the same plane.

?? degree

Reply:

23.5 degrees

Steve Asked:

Any powerful binoculars, that can allow you to see beyond 500miles, that is for public binocular sales? Tks

Reply:

Its called a telescope. Available at WalMart.

Gracey Asked:

I do not know too much about astronomy but i would like to see the planets and maybe nebulae. Especially saturn and andromeda. if that is possible as well if anyone could give me the best astronomy telescopes under 500$ as well as 1000$ and please explain why

Reply:

There are several different kinds of astronomy telescopes and all of them have some excellent features. Refractors and Reflectors, plus Schmidt-Cassegrain, APO refractors, Mac-Cass, and many more. There are also several mounts to chose from and the mounts are just as important, if not even more important, than the scope is. All of the different scopes and mounts have some features that some people like and do not like. No two eyeballs are the same and the perfect scope for one person might be completly wrong for another person.

There is no one scope that is “better” than another —except for the junk scopes out there which are all just a waste of money. Never, ever buy from Walmart, Costco, Target, or any other discount store like that. Junk scopes are flooded into the market from those stores. You will be buying nothing but bad optics and plastic.

If you are new at this, then stay away from anything used from any site. If you don’t know what you are buying and who you are buying from you will most likely be getting someone else’s headache—with no warranty either. Buyer beware you know. Some great deals on used equipment, by people who know how to use and take care of scopes, are out there but if you don’t know what you are doing, you might be spending a lot of money on junk.

Orion is the very best for value and for customer service too. I have 2 of their scopes and I will only buy from them from now on. My first scope was a manual controlled scope and I am very glad that it was because it forced me to learn where things are in the night skies. Go-To type scopes can be frustrating to use. If you do not have them aligned exactly perfect, they do not find the targets. If you are a beginner, you will be frustrated unless you spring for a GPS Go-To. An object locator is just that—it will locate objects for you (must be aligned first) but an object locator is not a tracking motor. It will not keep the scope on the target.

The Orion site has some excellent diagrams and explanations of all types of scopes and mounts.

Things to consider are size–can the user lift and transport the scope to the viewing site easily? Does it fit in your car? If not, then it will gather dust in a closet. I recomend a carrying case too so it is protected in storage and transport. Can the viewer reach all the knobs and buttons? I have a long tube large manual refractor and it is very dificult for me to reach the knobs when I am pointed to Zenith. I am not a tall person.

Take your time in making your decision.

+++ I would like to suggest that you join a local astronomy telescopes club or astronomical society BEFORE you spend your money on a scope. There are many different kinds of scopes and what is perfect for one person is not perfect for another. Everyone has their own set of eyeballs and no two are the same. If you join a club, you can attend a few of their star parties and try out members scopes to see what works best for YOU, before you buy a scope. The members can also help you when you get your scope and show you how to get the most out of your new scope as well as to help teach you where the treasures in the sky are located. Most clubs have loaner scopes and extensive libraries that you can gather more information from too. Most clubs will have monthly membership meetings with informative presentations given by members and by guest speakers. You can really learn a lot from these clubs and an added plus is all the great new freinds you make there too.

Some people will suggest that you purchase binnoculars. Not a bad idea but dont buy anything less than 10×50 and you must have a tripod too or you will not be happy with your astronomical views because they will be too shakey from your movements. Personally, I prefer a scope to binos because if binoculars are not aligned properly at the factory, then you get double images and distortions that cant be fixed. Most of the cheaper binoculars are not properly aligned. That is not as important for terrestial viewing but it is a killer for astronomical viewing. Binos can also be bumped out of alignment and become useless for astronomy.

When you buy go Orion and you wont be disappointed. Don’t try to learn everything all at once or you will be overwhelmed and discouraged. Patience is the key to Astronomy.

You will need a good star chart program too.

This is great freeware that you can download. Tell it where you are and it will tell you what you see. Ask it where something is and it will show you.

I wish you the best!

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