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telescope electronic

Night Vision Optics

Night vision devices (NVD's) have advanced considerably in recent years and this sophisticated technology is now easily available for anybody interested in outdoor pursuits such as camping, fishing, hunting, astronomy or sailing. Night vision devices work by capturing existing ambient light through the front lens. This light, which is made up of photons goes into a photocathode tube that transforms the photons into electrons. The electrons are then thrown against a phosphorus screen that changes the amplified electrons back into visible light which can be seen through the eyepiece. This image will appear as a clear, green-hued re-creation of the originally observed scene.

The main difference between various night vision devices is which type of image intensifier tube is used. A Night Vision Device can be either a 1st, 2nd or 3rd generation:

Generation I A GEN 1 unit will amplify the existing light several thousand times to provide an image that is magnified and easily viewed by the night scope's eyepiece (ocular). These units are the most reasonably priced night vision devices and so provide the greatest value to people seeking night vision capabilities.

Generation II GEN 2 devices use a micro-channel plate to achieve lower image distortion as well as higher light amplification characteristics. This extra process allows GEN 2 units to amplify the light many more times than their GEN 1 counterparts, creating a significantly brighter and sharper image.

Generation III These devices have gallium arsenide added to the intensifier tube and a special protective film on the micro-channel plate, which increases the life of the tube, thus providing the user with good to excellent low light performance. GEN 3 devices are military standard.

For more information and to view a comprehensive range of NVD's, visit www.sherwoods-photographic.com, a family owned company who specialise in telescopes and binoculars.

About the Author

The Article is written by sherwoods-photo.com/ providing Night Vision and Telescopes Services. Visit http://www.sherwoods-photo.com/ for more information on sherwoods-photo.com/Products & Services___________________________Copyright information This article is free for reproduction but must be reproduced in its entirety, including live links & this copyright statement must be included. Visit sherwoods-photo.com/ for more services!

Telescope users...?

Not sure even where to post this but I want to get my husband one and have looked online. Not knowing anything about them, it is hard to make a good choice. For a beginner, what should I look for? what MM?what brands are good? bad? what about electronic hand? I'm looking to spend under $200, and there seems to be plenty to chose from in this price range, but I need some guidelins from somebody who knows about them. Any ideas?? thanks!

There's a lot to know when buying a telescope. Too much to list here. The link below leads to a good site that can answer your questions. Unfortunately, $200 really won't get you a better scope. Certainly not a computerized one. But it can get you something to let you look at the sky.

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Konus Konusmotor Electronic 500 Newton 114mm 45 Telescope 1781 Telescopes    US $159.95

BUSHNELL SKY TOUR ELECTRONIC 700MM X 3 REFLECTOR BLACK GLOSS TELESCOPE 78 9930    US $89.99

MEADE DIGITAL ELECTRONIC TELESCOPE MODEL DS 190EC NEW OPEN BOX    US $179.99

BUSHNELL NORTH STAR ELECTRONIC TELESCOPE WITH A HANDHELD CONTROL    US $145.00

MEADE Model DS127 Telescope with Tripod Electronic Digital Series    US $219.99

Meade ETX 90EC 90mm Astronomical Telescope w Electronic Controller New In Box    US $989.00

Meade ETX 90EC Telescope w Electronic Controller Lenses Sun Filter Software    US $384.00

telescope electronic

Telescope Electronic

What is a Digicam and How Does it Take a Picture?

What Is A Digicam And How Does It Take A Picture?

Digicams – most commonly known as digital cameras – are cameras that can take still photos and short videos using a digital method that records the images onto a light-sensitive sensor and then transfers them onto a removable chip. Most digicams today can record sound with the video, and while they are not as high-tech as their camcorder cousins, the quality is good enough for short clips that you manage to take during candid moment.

A digicam also features options that most standard film using cameras do not. For example, digicams come with a LCD screen in which you use to line up the picture or video and then review them after the have been taken. The storage medium allows the user to take considerably more pictures than the average roll of 24 or 36 exposure film – a 1 GB chip can store over 200 photos. Users who are not happy with the picture they took can immediately delete and take it again without wasting an exposure or film. Plus, the chip can be erased and reused over and over again.

Digicams can be found not only in a standard compact camera format, but also in mobile telephones, PDAs and even in high-tech instruments such as telescopes. The Hubble Space Telescope is a very large, very specialized digicam. The flash in a digicam is built in and users can play with the variety of settings available on them – in the mobile phone and PDA style – to make their pictures more interesting. Setting such as sepia and black and white, red eye reduction, and more all make a digicam more versatile that a traditional film camera.

This technologically advanced camera takes a picture in the same way as a traditional camera with the exception of needing to use the optical frame. On the back of a digicam – or on a separate piece connected to the device – is an LCD view screen that acts in the same way as the optical frame with the exception that you do not put it to your eye. By lining up the picture with the LCD screen, you are ready to take the picture. Digicams have shutters just like a regular camera and some move a little bit faster. The shutter will open and close, capturing the picture.

Instead of imprinting the image on film, a digicam will convert the image into a digital format. It will then save the image file on a small media chip that can then be placed into the user’s computer and the pictures or vide downloaded onto the computer to be viewed or printed. Depending on the megapixel resolution of your camera will determine just how clear and sharp your photos are.

Digicams do save money in that the pictures can be developed and printed at home as many times as the user wishes. They are easy to use and you never have to worry about running out of film during all of those ‘Kodak moments’.You can find a great range of digicams as well as many other electronic gadgets at GadgetsAuction.com

About the Author

The author, Sue Webster, provides information for readers interested in purchasing a digicams or other related accessories.

How can I decrease a telescope's magnification without changing the eyepiece?

I have this cheap telescope that I want to manipulate to increase it's field of view/decrease magnification for an electronic eyepiece. Is there something I can do with the primary mirror? Do companies make the reverse of barlow lenses?

There are "focal reducers" that shorten the focal length of refractors. This is the opposite of the Barlow lens.
You can buy them, but they are specifically designed for particular scopes, and are expensive, probably more than what your scope costs. They come in 0.33, 0.50, and 0.63 power.
Making your own is possible. If you get two long focus objective lenses (a pair of front lenses from 7x35 binoculars) held close together, curved side almost touching curved side, that would be a good one.
You cannot use this on a mirror telescope like a Newtonian because there is not enough space between the small diagonal mirror and focusing eyepiece to put one.
There is nothing you can do with the primary mirror to change the way it focuses light.

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Best Match Time: ending soonest Time: newly listed Price: lowest first Price: highest first Price + Shipping: lowest first Price + Shipping: highest first

Konus Konusmotor Electronic 500 Newton 114mm 45 Telescope 1781 Telescopes    US $159.95

BUSHNELL SKY TOUR ELECTRONIC 700MM X 3 REFLECTOR BLACK GLOSS TELESCOPE 78 9930    US $89.99

MEADE DIGITAL ELECTRONIC TELESCOPE MODEL DS 190EC NEW OPEN BOX    US $179.99

BUSHNELL NORTH STAR ELECTRONIC TELESCOPE WITH A HANDHELD CONTROL    US $145.00

MEADE Model DS127 Telescope with Tripod Electronic Digital Series    US $219.99

Meade ETX 90EC 90mm Astronomical Telescope w Electronic Controller New In Box    US $989.00

Meade ETX 90EC Telescope w Electronic Controller Lenses Sun Filter Software    US $384.00

Telescope Electronic

Telescope Electric Focuser

The Best Option in Lighting Tower

Here is what you need to look for when seeking a premier manufacturer of Mobile lighting towers for hire. A main question to ask yourself is whether the design focuses on reliability, safety, functionality and overall cost of ownership.

An excellent lighting tower can either be towed to site, becasue it's fully equipped with road lights, reflectors and number plate clip or using the fork pockets or central lifting eye provided be readily off loaded from transport by tele handler, forklift or crane.

Is it one of the most compact lighting towers available? Efficient to transport, occupying less yard space when not in use and above all easy to maneuver and deploy - these are strong benefits. Once in position can the park brake be applied and the stabilizers lowered and as a safety feature, is it set up so the mast cannot be raised unless the park brake is on?

Make sure of these things. The engine is a highly efficient, water cooled diesel unit which will run for 85 hours on a single tank. A lockable cover plate protects all the mechanical and electrical controls. The 4, 1000 watt lamps can be independently angled for precise light control and are fitted with high quality industry standard metal halide bulbs. In use, excellent mobile lighting towers, with their immense light output can be found as lighting towers for hire giving temporary light from construction sites to road infrastructure projects and railway works to car park areas.

One example has a fixed vertical telescopic mast which can be quickly raised to its maximum 9 meter height. It's very stable in windy weather. Compared to other hire lighting towers this one is faster to deploy, much safer to use and is easier to transport and maneuver.

A good rig is fully sound proofed and is super silent, reducing environmental noise pollution to an absolute minimum. It may also fully bunded for environmental protection and uses Bio-degradable oil in the hydraulic system. A nifty feature of some lighting towers is the ability to adjust the lights from the ground with the mast extended.

There is a potentially lethal consequence if the tower mast accidentally connects with overhead power lines when shifting the tower on site, and a further safety feature (commended by the British Health and Safety Executive) makes sure the erected mast automatically retracts if the park brake is released. This feature doesn't exist on some lighting towers - make sure the one you hire does.

Seek a brand that is constructed well, easy to use and backed by great after sales service. There are a couple which are without doubt the ultimate in lighting towers. Approved by Network Rail in Great Britain for use in the rail industry, they are also used for public event lighting, general rental, and in the petro-chemical industry. Lighting tower hire businesses who are leaders say they are the best choice

About the Author

Excapac is the leading lighting tower hire business in Queensland. Visit them at their Lighting Tower Webpage or call 1300 922 822 now for a quote on one of the best mobile lighting towers, the SMC TL90. Published by Rick Rakauskas at Semantic Writer

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Telescope Electric Focuser