Lens Accessories for Your Camcorder

Lens filters and accessories help you capture creative clips without digital manipulation.

There’s nothing more satisfying than finding just the right thing to give your videos a fresh new look. Three types of camcorder lens accessories – lens filters, wide-angle lens adapters and telephoto lens adapters – offer you extra flexibility and creativity when you begin to acquire your footage.

The frustration of not getting everything you want into a shot simply because you can’t physically move any farther back is a common one.

Those clever lens accessory makers provide a wide array of add-on lens adaptors designed to let your camera see more of the horizontal and vertical field of view at a given distance. At some point, wide-angle lenses introduce an unacceptable amount of distortion, which manifests itself as a fish-eye view.

Probably the most flexible type in the category is the “zoom-through” wide-angle adapter. As the name implies, this design lets you increase the viewing angle of your lens, but keeps it’s ability to zoom intact.

Not all wide-angle lenses are of the zoom-through variety. A standard wide-angle diopter provides a larger viewing field, but at a fixed focal length. Once you put it on the camera, you’re restricted to that one wide shot.

Tele-extenders do just the opposite. These screw onto the front of your camcorder’s lens and expand its long-range zoom capabilities.

A 2x extender affixed to the end of your camcorder lens will let you make objects appear twice as close as they appear without the accessory.

However, with that plus comes a minus. Lens extenders typically restrict the amount of light that reaches your camera’s CCD. So, to get a properly exposed picture with a tele-extender in place, you’ll need to arrange for more light to fall on your subject or you’ll need to open up your aperture, thereby reducing your depth of field. These long-lens accessories are most useful when used outdoors and in other situations where you have plenty of available light.

Another challenge with tele-extenders is that at your camcorder’s widest zoom setting, the barrel of the extender will actually mask a portion of the frame, providing a round window effect instead of a full frame.

With an extreme extender, like a 5x lens, you might only get a full field of view at your camcorder’s maximum zoom. And the resulting images will be quite a bit dimmer than your camera would otherwise produce.

Get Close

At the other end of the lens spectrum are macro units designed for closeup work. These attachments allow you to focus your video camera’s lens nearly on top of an object. Although most camcorders have fantastic default macro capabilities (just see how close you can get to an object with yours), you can use macro attachments to get extreme closeups without getting physically close to the object, which in practice allows you to get more light onto your subject.

These accessories are ideal for videotaping coin or stamp collections, and closeup lenses are often just the ticket for copy-stand work, allowing you to get your camera really close to modest-sized objects so they’ll fill the entire video frame.

The artistic uses of a colored piece of glass (albeit an optical-grade piece of glass) in front of your camera’s lens do not begin to cover the sophisticated applications of lens filters. The most simple and inexpensive is a protective filter, which is a clear piece of glass used to guard the expensive optics of your lens. Glass inherently stops potentially damaging UV radiation, so most protective filters also tout their ability to stop UV light; it can’t hurt and doesn’t cost any more for a UV filter. The next level is a neutral density (ND) filter, which is a gray piece of glass, designed to lower the total amount of light entering the lens without changing its color. This can be useful when you want to open up the aperture for some depth-of-field effects on a bright day. ND filters come in a variety of densities. Another variation on the ND filter is the gradient filter, which you can rotate to diminish the light from the sky for example, allowing you to properly expose two greatly disparate areas of a scene.

Another handy filter for use in the sun is a polarizing filter. It controls reflected light, which comes at the camera in straight, parallel lines. Polarizing filters can reduce glare from water, snow, glass or other non-metal reflective sources and thereby allow you to capture deeper, more saturated colors.

Color correction filters are also available, but camcorders can often do without these filters with careful and intentional manual white balancing techniques. You may find artistic or creative uses for colored filters, however.

Digital Radiography – a Must in invisalign dentistry

Digital Radiography – a Must in invisalign dentistry

Dr. Steve Thompson DDS

Paper x-rays and digital x-rays effectively provide diagnostic information. Though paper x-rays have been used traditionally, developments in recent times see dental professionals using the modern technology of ‘digital radiography’.

‘Digital Radiography’ involves the use of a small sensor, which is briefly placed in the mouth during the x-ray process. This sensor is like a tiny camera which is more sensitive to x-ray light than normal light.

The immediate benefits of Digi Images over conventional X-Rays:

Patients worry about the radiation exposure they may face with every x-ray. invisalign dentists are no different in this worry, and follow the ALARA principle to ensure minimal radiation as well. ALARA is an acronym for ‘As Low As Reasonably Achievable.’

Though digital radiography is a quick and easy method of diagnosis, the invisalign dentist does keep its use to the minimal to comply with ALARA & reduce the radiation exposure.

Over time with scientific developments, radiation exposure though xray has been reducing, let’s say 10 or 20 or even 30 years ago. This has been possible primarily because the amount of exposure per radiograph has decreased hugely over the last few decades.

Newer digital radiography is now available and it offers invisalign dentists excellent diagnostic results.  It has also decreased radiation exposure by up to eighty percent.

The digital images are stored in the patient’s computer file and these can be easily printed or emailed for communication with the patients, specialists or even insurance companies. It is also easier to compare images from one appointment to the next to allow the invisalign dentist to notice changes that may occur over a period of time.

To summarize:

• Digital radiography improves diagnostic ability
• It is faster
• It decreases radiation exposure
• Improves communication between the dental professional and the patient
• Images can be easily stored and also easily accessible
• Software enables the images to be enhanced

In today’s modern age, most dental offices have begun using digital radiography in order to take advantage of all the features available with the newer technology. Do ensure that your invisalign dentist uses digital radiography too.

Acai Elite Extreme Review – Does FREE Trial Really Work? – What is acai berry

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invisalign cost – The Bluetooth Marketing: A New Trend in the Direct Proximity Marketing

Bluetooth Proximity Mobile Marketing is the cheapest way to advertise direct to mobile phones that works by uploading an advert that can be video, animated image or text to the pod. This new tool works as a direct marketing channel to end users mobile phones. The first generation of these tools established a connection with the Bluetooth enabled phones which are within 20 meters from a dedicated hotspot. If the user agrees to accept the advert on the mobile phone, the download proceeds at a speed of about 50kB/sec. The data transfer is 100% free.

Bluetooth Proximity Mobile Advertising is environmentally friendly as it doesn’t involve the use of paper and simply requires the transfer of rich multimedia digital flyers direct to Bluetooth enabled mobile phones. A Bluetooth Marketing System is also a very economical and powerful tool to popularize your product. For a fixed invisalign cost you can scale your marketing efforts to meet your needs.

Proximity mobile Advertising provides the easiest means to attract customers and increase foot traffic at the store. If you own and operate or manage other venues like bars, restaurants, entertainment parks, Proximity mobile marketing provides an opportunity to send specials, announcements and one time notices to your customers and increase traffic. Proximity Marketing does not have to be expensive. There are several firms looking after the proximity mobile marketing including setting up the equipment and taking care of all the work.

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