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The 3D Phenomenon

When you watch movies on your new TV, everything onscreen appear real and not flat. That's 3D for you. In stereo microscopes, each eye view things from different angles as you would view the specimen from two independent compound microscopes that are set side by side and converging at an angle of 15 degrees. Whatever you inspect, these are outfitted with erecting prisms that work similarly to bincoculars, which makes manipulating the biological specimen easy.

In the operating theatres of hospitals, these play a crucial role during the actual operation. These microscopes have extra viewing features; a viewing tube fitted with a camera is wired to a large monitor screen and surgeons use this feature when dissecting or sewing up small veins or arteries. This feature allows for live dissecting demonstration for academic or professional sharing.

Outside operating theatres, the stereo microscope has its other uses too. Request dealers of stereo microscopes in Toronto to show you the latest models with added features. Available are high-end instruments from the world's leading microscope makers. The new breed of these microscopes showcase the incorporation of digital cameras that can fit several of their models and the zoom technology shows further enhancements.

Options and Choices

When shopping for a stereo microscope for your business or for your personal hobby, always ask about the latest in stereo microscopes in Toronto microscope stores. Since these providers carry a line of different brands ask for Leitz, Olympus, and Nikon. They will be willing to show more brand series models and give a demo for each microscope before you make a purchase - at no extra cost to you.

Also check the microscope's illumination. The newest technology integrates high brightness of LEDs and controller electronics. With this type of illumination application, this saves workbench space and facilitates ease of operation directly on the microscope, eliminating the hassle of removing your eyes from to eyepieces to check on the controller box and you can save the setting for the next day's dissecting session because this type of illumination has continuous dimming.

Dealers of stereo microscopes in Toronto also have accessories and parts to upgrade your own. Be ready to purchase dissecting pans, dissecting wax, teasing needles (straight and curved), dissecting scissors, steel scalpels, triple hooks, blowpipes, and other accessories you will need for your dissecting sessions.

If you are a jewelry artist, don't look far for microscopes. The stereo microscope is a business asset. Think of the enhanced designs you can create and the improved quality of your work when you use this. Yes, the stereo microscope is no exclusive for scientific or biology lab uses. This is a wonderfully accurate tool. For the application, you can ask for models suited for your requirements.

Stereo microscopes in Toronto stores offer options in price range. You can also get a second-hand stereo microscope, which is a smart option if you are using it for your hobby or for your craft. Just make sure it is what you want so request for a demo and see how the 3D feature works.

CanScope - complete solution for all your microscopy needs.
Contact: 1-877-56SCOPE(72673) or info@CanScope.ca

Dealers of stereo microscopes in Toronto also have the latest in biological microscopes. In Toronto you can also check out the latest in industrial microscopes. In Toronto microscope stores, you get more options and choices. Visit CanScope.ca today.

Ring Binder

Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009)

Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (October 2009)

A D-ring three-ring binder

Ring binders (sometimes called files in Britain) are folders in which punched pieces of paper may be held by means of clamps running through the holes in the paper. These retainers are usually spring-loaded, frequently circular (some rings are D-shaped, others are actually rods), and may have additional latching systems.

Binders come in many standard sizes with respect to both capacity and paper size. Most countries use a two or four hole system for holding A4 sheets. The most common type in Canada and the United States is a three ring system for letter size pages (8" 11"). A standard 8" 11" sheet of paper has three holes with spacing of 4". The lever arch system is particularly useful for larger amounts of paper. Many personal organizers and memorandum books use a six- or seven-hole system, including Filofax, the FranklinCovey Franklin Planner, and Day-Timer. These abovementioned systems have the rings on the left side of the papers as one opens the binder, but there are also binders that have the rings (concealed by the binder cover) at the top edge of the paper, reminiscent of a clipboard.

Most binder covers are made of three pieces, in the fashion of a hardback book, but are produced in many styles. Materials vary widely. Some vinyl binders have a clear pocket on the outside for cover pages, and many have pockets in the inner cover for loose papers, business cards, compact discs, etc. There are also zipper binders, which zip the binder up and keep papers from falling out.

History

German Friedrich Soennecken invented ring binders in 1886 in Bonn, Germany. He also registered a patent on November 14, 1886 for his Papierlocher fr Sammelmappen (hole punch). German Louis Leitz, founder of Leitz later made some important changes in development of ring binders in Stuttgart-Feuerbach. Leitz introduced the hole in the side of the file.

The 2 holes are 80mm apart, according to ISO 838. The 4 holes version has no ISO standard, the distances are 80mm, 80mm and 80mm.

Another design for ring binders was invented in 1889 by Andreas Tengwall in Helsingborg, Sweden and patented in 1890 under the name Trio binder, named after a business consortium of Tengwall and two associates. Tengwall's design uses four rings, two coming from each side in a forking fashion. The hole placement of Tengwall's Trio binder is still used as a de-facto standard for hole punching in Sweden under the name triohlning. These holes are 21mm, 70mm and 21mm apart.

See also

Wikimedia Commons has media related to: Ring binders

Hole punch

Notebook

Three ring binder

Tengwall's four ring "fork" binder

Categories: Notebooks | Office equipment | Stationery | German inventions | Swedish inventionsHidden categories: Articles lacking sources from December 2009 | All articles lacking sources | Articles lacking sources from October 2009

About the Author

I am China Bags Wholesale writer, reports some information about tough kid camera , coolpix 4300 nikon.

Old camera LEICA - does it have any value?

My father left me a Leica camera when he died.
It must be at least 40 years old.
I don't know what to do with it - I'm no photographer!
I would like to sell it - but I have no idea about how much it is worth or where I can offer it for sale.
Can anybody give me a suggestion?
Thank you!

PS: Leica - D.R.P. - Ernst Leitz Wetzlar - Germany

I suggest keeping the camera. After all, it belonged to your dad so in my opinion the sentimental value alone makes it worth keeping. Maybe you can find some pictures he took with it and display them along with the camera and maybe a couple of pictures of him.

Any money you get from selling it will quickly be gone but your children and grandchildren will treasure the camera owned by their ancestor.

If you're determined to sell it check here:

http://www.kurlandphoto.com
http://www.tamarkin.com

Note that you'll need pictures of the camera and a better description than what you've given here. Look for the model number - M3, M4, etc.. Check the site referenced and look at the Leicas they have for sale to get a better idea of how to identify yours.

I still suggest keeping it for the sentimental value.

Sony promises higher-end SLT camera
The electronics giant is pleased with its translucent-mirror camera designs, and it promises to sell a higher-end sibling to the a33 and a55 within a year.

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