Articles related to "Lens"

Save money and buy discount contact lenses online from an optical retailer offering an entire range of disposable, gas permeable, toric, colored or bifocal lenses.

While zoom lenses are convenient, prime lenses (non-zooms) have significant advantages. This article explains how to use prime lenses, and the different types available.

Get the perfect Halloween costume by wearing a pair of crazy contacts, sclera special effects contact lenses that cover the entire eye and not just the iris and pupil.

New SLR camera lenses often come with a removable hood. Though cumbersome, lens hoods can improve picture quality, and even protect the lens from damage.

Soft contact lenses are worn by most people who prefer lenses over glasses, but gas permeable lenses can be a more comfortable option for some wearers. Here's why.

Thinking of switching to contact lenses but need more information? Here are some answers to frequently asked questions from those new to wearing lenses.

Contact lenses are available for a variety of vision impairment problems including astigmatism. Here's a guide to the different types of lenses and their intended use.

People who have vision problems feel that the contact lenses are more modern than glasses. But, improper maintenance of these lenses result in serious problems.

Frighten Halloween party guests wearing Crazy Eyes contact lenses from Cooper Vision. Choose from 10 different colours and become a wolf, a vampire or just be a devil.

Anyone can perform simple testing procedures using a series of photos to assist lens choice and find the optimal settings for a lens.

How to vary the depth of field by adjusting the aperture and focal length on your camera to add an extra aspect to your digital photography.

Halloween contact lenses may be fashionable but wearers can get serious eye infections and even go blind if correct cleaning and disinfection practices are not followed.

Coloured contact lenses create a real Halloween zombie look without the need for elaborate makeup; prescription or plano lenses available to suit everyone.

Optician prescriptions can now be cheaper to fulfill online. Significant savings can be made on designer frames and Acuvue, Bausch & Lomb, Ciba and color lenses.

To protect a clean lens from scratches and fingerprints, screw on an ultraviolet filter.

Change or enhance eye colour with coloured contact lenses to suit the mood or the latest fashion. Buy discount lenses to wear daily or just when you need a fresh look.

The focal length and aperture of a lens will determine its suitability for a job. Here's how to choose the best Canon and Nikon lenses for different situations.

Digital photography has experienced a tremendous surge in popularity in the last five years. Here are some great tips for purchasing a DSLR camera.

Dressing up as a werewolf, a zombie or Dracula is easy using Wild Eyes contact lenses from Ciba Vision. Become the main Halloween party attraction with coloured contacts.

Colored fashion contact lenses can be worn by anyone, even if they don't require vision correction. Choose from color enhancing lenses or crazy designs for fancy dress.

Camera makers switched to bayonet-mount lens systems in the 1970s, producing adaptors so photographers could use their existing screw-mount lenses on the new cameras.

Photographers on a budget will be tempted by cheaper lenses from independent lens manufacturers. Are they as good as lenses from Canon, Nikon, Sony, Olympus and Pentax?

American computer aided design coupled with Japanese manufacturing techniques produced in the 1970s a number of camera lenses destined to become cult classics today.

Colored contact lenses will be improved with new technology. It will be clear at night and block out sunlight at day.

Photographers with a Canon 40D or 50D will want check out this fine lens

Patients with cataracts or other conditions of the lens that require surgical removal are given an artificial lens implant. What types of intraocular lenses are there?

Photographers dissatisfied with their photos will be tempted to blame the lens ("how good can a cheap lens be?") and "upgrade" to an expensive lens.

Pentax is making up for lost time with an avalanche of new cameras and lenses at PMA 08 in Las Vegas. The scarcity of quality Pentax telephoto lenses may be over.

Whether a player has a cheap paintball mask or the best brand out there, proper care of the mask is essential. Here's how.

Setting the aperture on a digital camera is more than controlling the amount of light passing through the lens.

Being short sighted, or myopic, shouldn't impact on the ability to safely enjoy scuba diving. There are a number of ways of improving a diver's vision underwater.

Both Nikon and Canon DSLRs can create professional quality images. The differences are more in the lenses, flash units, ergonomics and features.

Keeping contact lenses free of microbial contamination takes work. Compliance with lens care instructions is essential to prevent infection and eye injury.

Contact lenses can affect the cornea and cause it to reshape. Usually a result of problems with the lenses, sometimes eye doctors also intentionally reshape the cornea.

Contact lens prescriptions expire and contact lenses come with expiration dates. Consumer protection and safety are the reason behind the dates.

With a zoom range covering the commonly used focal lengths the new PENTAX DA 17-70mm f/4 AL [IF] SDM provides an insight into the future direction at Pentax.

Students new to using a microscope often get frustrated when trying to view objects, particularly at higher magnifications. Here's how to do it sans the aggravation.

Nikon DX cropped lenses work on Nikon full frame FX cameras, but Canon EF-S cropped lenses don't work on Canon full frame EF cameras.

Cropped sensor digital SLRs can use full frame lenses, but cropped lenses are normally a more practical choice.

Discover amazing details in the world around you using inexpensive close-up lenses with a digital or film camera.

Olympus recently announced three new zoom lenses to accompany their Olympus E-3 Digital SLR (single lens reflex) camera, featuring wide apertures and ultrasonic motors.

Cycling sunglasses are specifically designed to protect eyes from sun glare, dust and insects. Here's a guide to key features and the best brands of sports sunglasses.

The oil immersion objective lens must be used in order to see individual bacteria through a light microscope. Here are the steps required to get a sample in focus.

Trying to learn the parts of a compound light microscope? Here are clear descriptions and detailed photos to help you become a master of the microscope.

Help choosing camera gear for basketball photography. Venues place their own demands on sports photographer's cameras and lenses, particularly in dimly lit gyms.

A 50mm F1.4 lens can be two to three times the cost of a 50mm F1.8. A recurring question on photography bulletin boards is naturally, "Is the F1.4 worth the price?"

Zoom lenses are not always the best choice for every photographic situation. Prime lenses have advantages that sometimes makes them the first out of the camera bag

Lens filters in digital photography are just as important as with film camera lenses. Learn why these filters are necessary in any photographer's gear bag.

Astigmatism is a condition in which light bends more in one plane than in a perpendicular plane. Oftentimes the cornea of an astigmatic eye slopes and is not spherical.

Nikon photographers typically start off with a bundled zoom kit lens. Here are some suggestions on which lenses to get next.