Wide Field
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 20X 30X 40X 60X SUPER WIDEFIELD STEREO BOOM MICROSCOPE  US $384.00
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 20X 40X 80X SUPER WIDEFIELD STEREO BOOM MICROSCOPE US $358.00
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 10X 15X 30X 45X SUPER WIDEFIELD STEREO BOOM MICROSCOPE US $351.00
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 SUPER WIDEFIELD COIN MICROSCOPE 5X 10X 15X 30X US $329.98
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 SUPER WIDEFIELD STEREO MICROSCOPE 10X 15X 30X 45X US $299.44
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 20X 30X 40X 60X SUPER WIDEFIELD STEREO MICROSCOPE US $299.00
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 SUPER WIDEFIELD STEREO MICROSCOPE 10X 20X 30X 60X US $272.70
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 SUPER WIDEFIELD TRINOCULAR STEREO MICROSCOPE10X 30X US $296.98
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 5X 30X SUPER WIDEFIELD STEREO MICROSCOPE w TWO LIGHTS US $296.95
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 20X 40X 80X SUPER WIDEFIELD STEREO TWO LIGHT MICROSCOPE US $269.00
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 10X 20X 40X TWO LIGHT SUPER WIDEFIELD STEREO MICROSCOPE US $259.75
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 LEICA ATC 2000 WIDEFIELD MONOCULAR MICROSCOPE US $250.00
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 20X 40X SUPER WIDEFIELD STEREO MICROSCOPE w TWO LIGHTS US $252.98
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 20X 40X SUPER WIDEFIELD STEREO MICROSCOPE W TWO LIGHTS US $229.98
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 10X 30X SUPER WIDEFIELD STEREO MICROSCOPE w TWO LIGHTS US $229.95
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 Leica ATC 2000 10x Widefield Monocular Microscope P R US $169.99
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 BINOCULAR STEREO SUPER WIDEFIELD MICROSCOPE 10X 30X BN US $159.00
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 Leica ATC 2000 Widefield Monocular Microscope P R US $149.99
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 Oylmpus BX Widefield Eyepiece Lens 24mm WHN10X H 22 US $100.00
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 PAIR OF EXTREME WIDEFIELD 20X EYEPIECES 30MM US $109.98
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 PAIR OF EXTREME WIDEFIELD 10X EYEPIECES 30MM US $99.95
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 2X BARLOW LENS FOR WIDEFIELD STEREO MICROSCOPES US $99.00
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 NIKON WIDEFIELD E2 TB MICROSCOPE EYEPIECE CF1 US $99.00
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 SUPER WIDEFIELDPLAN 10X MICROSCOPE EYEPIECES30mm tube26mm diam lenses US $99.00
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 OPMIsurgical 16x focusable SUPER WIDE FIELD eyepieceGREAT25mm tube ^ US $95.00
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 Swift Microscope Zoom Widefield Eyepiece 10x 20x NEW US $90.00
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 Olympus WHB 10x 2 Widefield eyepiece N1129900 US $90.00
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 SUPER WIDEFIELD 10X 22 EYEPIECE WITH RETICLE 30MM US $89.98
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 2 WF20X 10 WideField Eyepieces for Microscopes 30mm US $73.40
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 WF15X 16 30mm WideField Eyepiece for Stereo Microscopes US $69.99
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 WF20X 12 WF20X 12 Widefield Eyepiece for Microscope US $69.00
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 MICROSCOPE EYEPIECE 10x WF 145 WideField 10 X WF Pair PARTS US $64.99
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 2 WF10X 20 WideField Eyepieces for Microscopes 30mm US $64.99
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 Super Widefield WF15X Eyepiece With Reticle 30MM US $45.99
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 New One Widefield WF10X Eyepiece With Reticle For Stereo Microscope 30MM US $45.89
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 WIDEFIELD WF10X EYEPIECE WITH RETICLE 305MM US $44.95
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Wide Angle Lenses - Five Tips for Photos With More Impact
Photographers shopping for a new digital camera are bombarded with information about the power of modern zoom lenses. "This camera has eight-times optical zoom and up to twelve times digital zoom but this camera has twelve times optical and..." You know the drill.
A powerful telephoto lens is terrific, and essential if you are shooting lots of sports photography, wildlife photography, or any photography that requires you to capture your subject from a distance. But with all the marketing that goes on around telephoto power, you could be forgiven for believing there is little value in a good wide-angle lens.
This is simply not the case. In fact, if you take a lot of travel photos, you may find that your powerful telephoto rarely gets a workout. As a landscape photographer, I use my wide-angle lens a lot more. I can tell you right now that even though the wide-angle lens makes everything smaller, it can create images with massive impact if you use it well.
So here are my five tips for creative photography with a wide-angle lens.
Wide-Angle Photography Tip #1. It Really Is A Wide Angle. When using a larger lens, you narrow your field of view considerably, so if you focus on a subject in the foreground you really don't capture much of the background. On the other hand, with a wide-angle lens you capture a much wider field of view. Your foreground subject may still be the focus of the image, but you can make use of the background to add interest to the picture as well.
As a result, your picture can tell more of a story. Instead of a photo that says "Here is a shot of my kids" your photo can say "Here is a shot of my kids at the beach, you can see what a beautiful day it was and I managed to capture a sailboat going by as well."
Wide-Angle Photography Tip #2. Depth Of Field. The wide-angle lens has a much stronger depth of field than a larger lens. Not only can you make a feature of both foreground and background, you can keep everything in focus while you are at it. To achieve the same result with a larger lens, you may have to close the aperture, which means slowing the shutter speed, which means using a tripod...a lot of exta effort. After all that, the depth of field may still not be as strong as if you had used your wide-angle lens.
Wide-Angle Photography Tip #3. Perspective. Perspective is exaggerated by a wide-angle lens, so it makes long objects seem even longer. If you are shooting a fence-line, a jetty, railroad tracks, a road...anything that stretches away into the distance, the wide angle lens can really give your photo a boost. The result will be a truly three-dimensional sense of depth. The strong lines of the composition will lead the viewer into the picture, so they feel they are not just looking at the photo, but right into it.
Wide-Angle Photography Tip #4. Powerful foregrounds. The exaggerated perspective of the wide-angle lens makes objects at different distances seem much further apart than they really are. Foreground objects may seem a bit smaller, but objects in the background can seem many miles more distant. As a result, the wide-angle lens is excellent for adding impact to a foreground subject. You can stand very close to a person (or a tree, whatever) and they will appear to tower over the scene in the distance. This is the opposite of a telephoto lens, which tends to bring the background into prominence.
Wide-Angle Photography Tip #5. Putting It All Together. All the above tips are helpful by themselves, but by putting them all together you have the power to create photos that really grab the eye of the viewer. There is not enough space in a short article to outline all the ways you can use these tips, so I will give you one example that puts all the strengths of a wide-angle lens to good use.
Imagine an old rustic farmhouse, with a striking cloud formation behind it. Your telephoto lens might fit in just the farmhouse, and a standard lens might fit in the house and the sky.
With a wide angle lens, you could walk down the driveway and look for some special detail (maybe a rusty old mailbox) to create a more interesting composition. If you stand near the mailbox, it will have prominence in the composition, but you will still have a clear shot of the farmhouse and the sky in the background. Even better, the strong depth of field makes it easy to keep everything in focus. The exaggerated perspective will make the driveway seem longer, adding a three-dimensional impact to the picture. If you do it well, the first thing that catches the eye will be the mailbox, but the driveway will lead the viewer into the distance, to appreciate all the detail of the background as well.
So there you have a quick introduction to the creative use of a wide-angle lens. I hope this little article does more than just just spark your imagination. Reading about it is not nearly as exciting as doing it...so grab your camera and start snapping!
About the Author
Andrew Goodall's ebook "Photography In Plain English" covers all the essentials - aperture, shutter speed, depth of field, wide angle and telephoto lenses...it is all there is simple language you can understand. Visit http://www.naturesimage.com.au to see all of Andrew's work, and sign up to the online newsletter for even more great tips...it's free!
Loupes - a quick guide to dental loupes frames
Loupes are recognised as an must have for the dental professionals every day use in practice. Best magnification and the correct lighting environment are vital for consistency and success of clinical procedures for the loupe to work best.
There are various different options available on the market, including TTL. Flip-Up loupes, which are fully adjustable binocular systems and are supported by an articulated joint connected to the glasses. TTL means that the eyepiece is placed an at optimal distance from the pupil providing a wide field of vision.
Custom loupes are not just for aesthetic purposes, but can enable clinicians or anyone using magnification for long periods. These loupes are ideal to operate at an ideal working distance without causing eye strain, helping with neck pains or backache.
Two designs of telescope are commonly used for surgical magnification, these are Galilean and Keplerian (or prismatic). Galilean loupes designs are simple, relatively unobtrusive and lightweight and are used for the lower magnification (2.3x to 3.5x) loupes.
Where a higher magnification (up to 8x) the oculars are inherently longer and heavier. But a better clarity image is required than Keplerian loupes are the best option.
Good illumination from a high intensity headlight complements the use of loupes and in some cases can be colour corrective. Best working policy for use of the loupes whilst working are employing high quality lighting technology will increase your depth of vision.
A quality dental loupes will greatly improve the clinicians abilities to perform exacting dental procedures and operations in the dental surgery.
Modern wraparound frames are very comfortable and provide greater splatter protection for the user. This loupes frame is especially popular with dental hygienists Technology mean loupes are now presented on extremely lightweight, designer frames that incorporate the correct lens size, shape and pantoscopic angles providing perfectly magnified vision that look good too.
He has many articles published on the internet. What interests Andrew about loupes magnification is that they are used by only a few people but effect so many. Andrew Cambridge compiles articles for denistry , and other health industries.
A rectangular field is 5 times as long as it is wide?
Solve math problem for quick 10 points please
A rectangular field is four times as long as it is wide. If the perimeter of the field is 500 yards, what are the field's dimensions?
If you can explain the solution of P= 2L + 2W above " I believe this is what deminsions to come out to since im in Algebra.
The question should say 4 times as long as it is wide.
length = L
width = W
So, the perimeter P = 2L + 2W
but L = 4W
So, P = 10W = 500
W = 50
L = 200
NASA's Wide-field Infrared Survey Explorer - WISE
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