Our Counter Point folders offer almost all the same benefits as our Counter TAC boot knife series but in a smaller lighter and more easily concealed package. The blades are in a classic boot knife shape with long false edges and needle sharp points to guarantee the ultimate in pration...
The Carson StarMapLight Red-LED Flashlight SL-1 is a red LED flashlight for low-light use. This Carson Flashlight is great for astronomy, photographic darkrooms, or reading theater programs without disturbing others...
BE14040 The Bering Optics Wake2 is a first-rate Generation 1 monocular that provides a clear and clean image. The Wake2's ease of use makes it perfect for observational applications. At 200 yards the field of view is more than 50 yards which makes it ideal for viewing moving objects...
Advanced microfiber fabric lifts dirt, fingerprints, water, and oil from lens surfaces without scratching, streaking, or smearing. Does not require lens fluid! 80/20 polyester-nylon fiber blend absorbs moisture, rather than just pushing it around...
Double Convex Lens A wonderful double convex lens! Measures 63mm (approx 2-1/2") dia with a 78mm (3") focal length. Make your own telescope, or teleidoscope. Spin it around on top of your desk when you're not magnifying your cuticles with it...
The Bushnell 8x21 PowerView FRP compact binoculars combine contemporary styling and design with traditional Bushnell quality and durability. They are easy to use and economical and feature general-purpose roof prisms...
Binoculars come in a wide range of shapes and sizes these days, and an even wider range of prices. It's easy to spend less than $100 or more than $500 for what may appear to be, at least outwardly, comparable models...
Broner Hats brings us this straw hat in Black. This Broner Telescope Crown Hat features a striped and pleated band. 88-861 General Hat Sizing: Size Small = Size 6 3/4 - 6 7/8, 21 1/8 - 21 1 /2 inches. Size Medium = Size 7 - 7 1/8 , 21 7/8 - 22 1/4 inches...
The Celestron(r) 400x Laboratory Biological Microscope comes with many scientific essentials such as a diaphragm and a condenser. Its efficient charm comes in its power and precision, with 3 different objective lenses and a monocular, adjustable head that rotates from 0 to 60 degrees for comfortable viewing.
If you're looking for an affordable entry-level telescope for that beginning astronomy enthusiast, our SpaceProbe 3 Altaz is the perfect choice. Great for all-around stargazing, this highly portable, uncomplicated scope is just the right size and weight for the entire family, and just the right price for parents...
Orion’s Observer 70 EQ combines the solid optical performance of a classic achromatic refractor with a German style equatorial mount. The Observer 70 features very good optics and 36 percent more light gathering power than 60mm beginner scopes...
This book assembles for the first time in a single text the full range of astronomical and engineering principles used in the design and construction of large telescopes. It aims to cover all aspects of the field, from the fundamentals of astronomical observation to optics, control systems, and structural, mechanical, and thermal engineering, as well as such specialized topics as site selection and program management...
FEATURES Rechargeable Lithium-ion battery charges from computer USB port: 1 Nylon lanyard to hand speaker around your neck: 2 Expandable woofer for optimum sound quality: 3
This incredibly useful tool can be used to communicate confidently with your tree care clients and staff. Helps eliminate costly errors due to mis-communication or unclear verbal instructions. You'll be able to easily point out of reach areas in need of pruning or hazards needing attention...
View fascinating simulations of the solar system, NASA video clips, 3-D animation, and hundreds of images. Unravel the mysteries of the universe, galaxies, nebulae, stars, constellations, and the solar system like never before...
The Galileo Planetarium program is a must have for beginning and intermediate star gazers alike. With the Galileo Planetarium you can easily locate objects in the sky. It's easy, just input your location and time and your all set...
Extremely Large Telescope - A Home For The E-ELT
Optic lens???
What kind of abberation suffer simple spheric lens?
and what kind of abbertaion suffer aspheric lens?
If I use one aspheric lens for telescope primary lens, what is the problems with the lens? What about the distortion?
Spheric lens suffer of spherical abberation the aspherical lens is the answer for this type of abberation. But because the light rays goes through the lens there is chromatic abberation aberation of collors avary collors goes through another focus point. Telescopes uses Achromatic lens or Apochromatic[more advanced] lens. This lenses is good for no spherical and no chromatic abberation. The chromatic abberation is healed by three colors RGB [red,green,blue] The focus of this three colors are in one point.
I saw a flyer in a recent discount store for telescopes (National Geographic 565x magnification), and I'm wondering whether or not I should make the purchase for $50.00 CAD. I know it wouldn't be showing me much, but would this be a step in the right or wrong direction? How much magnification is 565x, in terms of what I'll be able to see?
Thank you,
Av
Don't waste your money. It's a piece of junk and you'd be lucky to see the moon with it. If you ever see any telescope that has a magnification on the box or in the ad, you can be assured that it's something you don't want to waste money on. To get even a marginal scope, you'd have to talk $250 or so.
Telescoping Multiladder quickly converts 20 working heights or positions, including a twin stepladder (4' to 7' high), extension ladder (8' to 14' high), stairway stepladder (5' to 7' high) and self-support 1' to 2' high, two-scaffold base (plank and tied downs not included)...
Designed for do-it-yourselfers and built to meet industrial quality standards, Xtend & Climb Home Edition Telescoping Ladders are a sensible alternative to traditional bulky extension ladders. Lightweight and compact, these ergonomic ladders bring ease of use to everyone in your household...
Bill Murray was heading toward a career peak on the back of comedies such as this one from 1981, the second film in his ongoing collaboration with director Ivan Reitman (the two went on to make Ghostbusters)...
INDICATIONS: Flents Eye Patch Regular is made Of soft, smooth metetrial. Shaped for comfort and protection, minimizes pressure, and holds patch securely. Elastic headband. One size fits all.
Manufacturer: Rubbermaid. Sold Individually PVA Sponge Mop, Head Refill Polyvinyl alcohol, 12" wide, blue sponge is absorbent and durable. Rippled design for excellent scrubbing action. Hand-operated lever for effortless wringing...
The Kensington 62903 Contour Overnight Notebook Roller gives you one case with comfort, flexibility, and adaptability for your overnight travel. The Kensington 62903 has a built-in, five-stage telescoping handle that adjusts to match the height that is most convenient for you...
Rocket into orbit on an important space mission. Blast off from our LEGO City and set your navigation for deep space. Help the astronaut to open the cargo bay doors, then use the robotic arm to release the Hubble Space Telescope into orbit.
Orion's surprising little Spaceprobe 3 has been picked by independent reviewers as one of the best telescopes in its price class. Unlike similar telescopes seen in discount stores, Orion has refined the Spaceprobe 3 by paying attention to the little details, and that make this telescope a great value...
The Bushnell 8x21 PowerView FRP compact binoculars combine contemporary styling and design with traditional Bushnell quality and durability. They are easy to use and economical and feature general-purpose roof prisms...
Lightweight and portable, the Carson MM-200 MicroMax pocket microscope is ideal for on-the-go science. The MicroMax offers a powerful 60 to 100x magnification range, making it easy to examine blood samples, bugs, and anything else that's worthy of a closer look...
Bushnell PowerView binoculars offer the best of both worlds, combining contemporary styling and design with traditional Bushnell quality and durability. This particular PowerView binocular offers a 12x magnification and a 25mm objective diameter...
150 lb capacity, telescoping roof rack cross bar rails feature 1 inch thick bars that telescope from 44" to 60" in width. The rubber padded feet can be mounted in several different positions ranging from 33-1/4" to 56-1/4" providing multiple cargo loading configuration options...
Bushnell PowerView binoculars offer the best of both worlds, combining contemporary styling and design with traditional Bushnell quality and durability. This particular PowerView binocular offers a 20x magnification--among the most powerful in its class--and a 50mm objective diameter...
Bare Minerals: Naturally Classic collection part 1
Optic Telescopes the importance of glass in our lives? Easy Q... please help me name a few uses of glass in everyday life.?
what are the most common uses of glass? is it something we cannot live with out? name a few things to help me out, i named a few live Pc monitors, Cell phone screens, Microscopes, Telescopes, glass used for certain kitchen equipment, fibre optic cables? can you help me name a quick few? please and thank you =)
windows
light-bulbs
drinking glasses
vases
jewelery
lenses in spectacles
Our Counter Point folders offer almost all the same benefits as our Counter TAC boot knife series but in a smaller lighter and more easily concealed package. The blades are in a classic boot knife shape with long false edges and needle sharp points to guarantee the ultimate in pration...
The SL-11 StarMapLight from Carson Optical is a red LED flashlight designed for low-light use, and is ideal for applications such as photography darkrooms, astronomy, and illuminating your tent without disturbing fellow campers...
BE14040 The Bering Optics Wake2 is a first-rate Generation 1 monocular that provides a clear and clean image. The Wake2's ease of use makes it perfect for observational applications. At 200 yards the field of view is more than 50 yards which makes it ideal for viewing moving objects...
Advanced microfiber fabric lifts dirt, fingerprints, water, and oil from lens surfaces without scratching, streaking, or smearing. Does not require lens fluid! 80/20 polyester-nylon fiber blend absorbs moisture, rather than just pushing it around...
Double Convex Lens A wonderful double convex lens! Measures 63mm (approx 2-1/2") dia with a 78mm (3") focal length. Make your own telescope, or teleidoscope. Spin it around on top of your desk when you're not magnifying your cuticles with it...
The highest magnification binocular available, Night Owl Optics' 5-power binocular is an advanced, highly acclaimed generation-1 binocular. The aesthetics, ergonomics, and performance of this instrument are high-quality and recommended by the manufacturer for those who demand the highest performance that generation-1 technology can offer...
FEATURES Rechargeable Lithium-ion battery charges from computer USB port: 1 Nylon lanyard to hand speaker around your neck: 2 Expandable woofer for optimum sound quality: 3
This incredibly useful tool can be used to communicate confidently with your tree care clients and staff. Helps eliminate costly errors due to mis-communication or unclear verbal instructions. You'll be able to easily point out of reach areas in need of pruning or hazards needing attention...
The Celestron(r) 400x Laboratory Biological Microscope comes with many scientific essentials such as a diaphragm and a condenser. Its efficient charm comes in its power and precision, with 3 different objective lenses and a monocular, adjustable head that rotates from 0 to 60 degrees for comfortable viewing.
If you're looking for an affordable entry-level telescope for that beginning astronomy enthusiast, our SpaceProbe 3 Altaz is the perfect choice. Great for all-around stargazing, this highly portable, uncomplicated scope is just the right size and weight for the entire family, and just the right price for parents...
This tried-and-true refractor goes the extra distance in introducing the novice to the wonders of the night sky. The Observer 70 features a 70mm fully anti-reflection coated achromatic objective lens, which provides 36% more light-gathering ability than a 60mm...
View fascinating simulations of the solar system, NASA video clips, 3-D animation, and hundreds of images. Unravel the mysteries of the universe, galaxies, nebulae, stars, constellations, and the solar system like never before...
The Galileo Planetarium program is a must have for beginning and intermediate star gazers alike. With the Galileo Planetarium you can easily locate objects in the sky. It's easy, just input your location and time and your all set...
The Universe CD-ROM presents a comprehensive look at the basics of astronomy, physics, and space exploration. Examine comets, meteors, galaxies, black holes, and how planets and stars are born.
The Bushnell 8x21 PowerView FRP compact binoculars combine contemporary styling and design with traditional Bushnell quality and durability. They are easy to use and economical and feature general-purpose roof prisms...
Binoculars come in a wide range of shapes and sizes these days, and an even wider range of prices. It's easy to spend less than $100 or more than $500 for what may appear to be, at least outwardly, comparable models...
Broner Hats brings us this straw hat in Black. This Broner Telescope Crown Hat features a striped and pleated band. 88-861 General Hat Sizing: Size Small = Size 6 3/4 - 6 7/8, 21 1/8 - 21 1 /2 inches. Size Medium = Size 7 - 7 1/8 , 21 7/8 - 22 1/4 inches...
Optic Telescopes Whats the best way to hook up a telescopes ocular to the PC?
Hi,
I just bought my first "very good" telescope. A Meade ETX-125 PE. Now, I'm wanting to view the image I normally see through the ocular on my computer screen. Whats the best way?
1. A CCD camera or Meade DSI?
2. An Electronic or Digital Ocular
3. T-stand + T-ring + 12 MP Camera we already have..
I know number one is very expensive, but it films the whole ocular and not just a circle in the picture. The other two are cheaper and 3 is the highest resolution.
People that have some knowledge of optics/telescopes/camera's please tell me WHICH one and WHY or maybe there are OTHER possibilities.
Thanks in advance, I will elect the best effort...
My personal preference would be the setup that Orion offers.
This is their least expensive but they do have many that are even better.
Our Counter Point folders offer almost all the same benefits as our Counter TAC boot knife series but in a smaller lighter and more easily concealed package. The blades are in a classic boot knife shape with long false edges and needle sharp points to guarantee the ultimate in pration...
The Carson StarMapLight Red-LED Flashlight SL-1 is a red LED flashlight for low-light use. This Carson Flashlight is great for astronomy, photographic darkrooms, or reading theater programs without disturbing others...
BE14040 The Bering Optics Wake2 is a first-rate Generation 1 monocular that provides a clear and clean image. The Wake2's ease of use makes it perfect for observational applications. At 200 yards the field of view is more than 50 yards which makes it ideal for viewing moving objects...
Advanced microfiber fabric lifts dirt, fingerprints, water, and oil from lens surfaces without scratching, streaking, or smearing. Does not require lens fluid! 80/20 polyester-nylon fiber blend absorbs moisture, rather than just pushing it around...
Double Convex Lens A wonderful double convex lens! Measures 63mm (approx 2-1/2") dia with a 78mm (3") focal length. Make your own telescope, or teleidoscope. Spin it around on top of your desk when you're not magnifying your cuticles with it...
FEATURES Rechargeable Lithium-ion battery charges from computer USB port: 1 Nylon lanyard to hand speaker around your neck: 2 Expandable woofer for optimum sound quality: 3
This incredibly useful tool can be used to communicate confidently with your tree care clients and staff. Helps eliminate costly errors due to mis-communication or unclear verbal instructions. You'll be able to easily point out of reach areas in need of pruning or hazards needing attention...
Binoculars come in a wide range of shapes and sizes these days, and an even wider range of prices. It's easy to spend less than $100 or more than $500 for what may appear to be, at least outwardly, comparable models...
Broner Hats brings us this straw hat in Black. This Broner Telescope Crown Hat features a striped and pleated band. 88-861 General Hat Sizing: Size Small = Size 6 3/4 - 6 7/8, 21 1/8 - 21 1 /2 inches. Size Medium = Size 7 - 7 1/8 , 21 7/8 - 22 1/4 inches...
This book assembles for the first time in a single text the full range of astronomical and engineering principles used in the design and construction of large telescopes. It aims to cover all aspects of the field, from the fundamentals of astronomical observation to optics, control systems, and structural, mechanical, and thermal engineering, as well as such specialized topics as site selection and program management...
View fascinating simulations of the solar system, NASA video clips, 3-D animation, and hundreds of images. Unravel the mysteries of the universe, galaxies, nebulae, stars, constellations, and the solar system like never before...
The Galileo Planetarium program is a must have for beginning and intermediate star gazers alike. With the Galileo Planetarium you can easily locate objects in the sky. It's easy, just input your location and time and your all set...
The Universe CD-ROM presents a comprehensive look at the basics of astronomy, physics, and space exploration. Examine comets, meteors, galaxies, black holes, and how planets and stars are born.
The Tasco 165RB is a 8 x 21mm Essentials Roof Prism Binocular. It is perfect for giving to children, throwing in the glove box of a car or taking with you when you don't want to worry about your investment...
The Celestron(r) 400x Laboratory Biological Microscope comes with many scientific essentials such as a diaphragm and a condenser. Its efficient charm comes in its power and precision, with 3 different objective lenses and a monocular, adjustable head that rotates from 0 to 60 degrees for comfortable viewing.
Large structure in the moon - optical telescope = NO COMMENT ABOUT THIS TRUTH NO PHOTOSHOP NO EDITED
Both those telescopes will certainly work for you, but they are not in the same class as an 8" dobsonian. I would avoid "electronic" telescopes, for one thing, they usually don't work as well as advertised, for another, the actual telescope is not as good, because a lot of the price is in the mechanism. If you insist on that feature, Orion sells a 6" dob with the star finder feature on it in your price range that would blow both these telescopes out of the water.
In 1609, world-renowned Italian scientist, Galileo Galilei, introduced an elementary telescope to the growing astronomy community, which sparked interest into the mysterious night sky for centuries to come...
A powerful and capable telescope, the Orion SkyQuest XT8 Classic Dobsonian is one of our most popular reflectors due to its elegant combination of precision optics, mechanical simplicity, and rock-solid stability...
Orion StarBlast 4.5 Astro Reflector TelescopeLaunch a lifetime of stargazing with this compact, ready-to-use telescopeTop-notch optics show you the moon, the planets, the stars and moreScope comes fully assembled so you can go from box to backyard in minutesHigh-quality optics, point-and-view ease of use, remarkable portability, all for less than $200Your ticket to space-tourism without the zero-G nauseaMaybe it's because many of us started out with those frustrating little department store refractors, but at Orion we strive to offer quality telescopes for beginners that are easy to use and will inspire their natural inclination to explore...
Our classic XT8 isn't just great bang for the buck, it's a veritable explosion of telescope value. It combines powerful parabolic optics with the ultimate in mechanical stability. The SkyQuest XT8 features an 8" parabolic primary mirror that will tease out detail in nebulas, resolve stars in globular clusters, and reveal subtle structure in galaxies...
Affordable, powerful, and easy to use, our highly acclaimed SkyQuest XT6 is a great choice for beginners seeking an exceptionally capable telescope that's also nicely portable. Its 150mm-diameter, 1200mm focal length parabolic primary mirror gets the goods, rendering excellent images of deep-space objects as well as high-power views of solar system attractions...
Here's a list of the topics you'll find inside: Has The Night Sky Always Fascinated You Since You Were A Child? Do You Often Wonder What Lies Beyond The Dark Expanse Above? Do You Want To Fathom The Mysteries Of The Infinite Universe?Here's a list of the topics you'll find inside: - History Of Telescopes - The Evolution Of The Telescope - Historical Timeline For Telescopes- How Telescopes Work- Buying A Telescope- Finding The Telescope That Meets Your Needs - Factors To Consider When Purchasing A Telescope - Terminology- Astronomy 101- Zodiac Constellations- Andromeda - Build Your Own Telescope- Learn How To Build Telescopes- Make Your Own Telescope- Eyepieces For Telescopes - Why Using A Telescope Building Kit Is Convenient - Learn About Our Universe Using Telescopes- Basic Tips For Using Telescopes- Understanding The Value Of Telescope Lens- Achromatic Versus Apochromatic Lenses In Telescopes- Why You Should Consult A Telescope Review - Read About The 14" LX200R Through A Telescope Review- Learn Why That Telescope Review Of LX200R Raves About It - Tasco 48t Telescope - How The Hubble Telescope Was Almost Never Launched Into Space - Telescope Photos - Space Telescope Photos- Hubble Telescope Photos - Telescope Accessories - Meade Telescope Accessories - Celestron Nexstar 80 Telescope Accessories - Different Types Of Telescopes - Optical Telescope - Galileo's Telescope- Large Binocular Telescope - Reflecting Telescopes - Refracting Telescopes- Smaller Telescopes- The Best Telescopes Out There - Optical Features Of Telescopes - Telescope Mounts- Homemade Telescope Roof Mount - Telescope for Kids - Telescope Advice For Beginners - Using A Telescope - What Your Telescope Can Do- Viewing The Night Sky With A Telescope - Viewing Deep Sky Objects And Comets- Looking at Globular Clusters- Astrophotography- Current Astronomy News For The Sky And Telescope
Orion(r) SkyQuest(TM) XT Classic Dobsonians It's no wonder customers heap 5-star ratings on these gentle giants. For not only do their jumbo-sized optics and uncomplicated design bring a "new level of joy to simple observing," raved Astronomy magazine, but they're also the most affordable quality Dobs on the market...
