Aspherical lens photography

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Magnifiers and Loupes can be used, from helping you read a menu in a dark restaurant to checking jewels for imperfections, and each style has been perfected over the years with various additions, from powerful LED lights to stronger and more transparent glass. So whether you need a powerful tool for work or just a little help around the house while reading the newspaper, you'll find just what you need in a magnifier from OpticsPlanet-still having trouble finding the perfect magnifying glass? If you require even greater magnification, be sure to peruse our selection of outstanding microscopes!

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When shopping for new glasses, keep an eye out for the type of lens technology that’s being offered. Some eyewear shops carry only spherical lenses, whilst some may offer aspherical lenses – or both. Here at Mouqy, we’ve opted to use aspheric lenses in all our glasses. We’re strong believers in the sleek and light design over the bulkier spherical equivalents – but also love the superior optical clarity. Be sure to check out our full collection for stylish but functional frames!

Human eyes only can properly focus to approximately 6-8" (focal length) in front of them; as you get closer than that distance, the image often gets distorted and blurred as our binocular vision is not designed for such close distance viewing. Magnifiers and Loupes assist in allowing your eyes to focus at a closer focal length at a distance beyond human eye capability. A magnifier or magnifying glass uses a convex lens (a thinner lens at the edges and thicker at the center) to magnify. A convex or bi-convex lens shape bends light rays inward, enabling an enlarged view when looking through the lens. A traditional magnifier has a round-shaped lens secured in a frame that holds the lens and handles, allowing the user to keep it at a comfortable distance and its focal length. The magnifying lens can also bend light rays inward to converge sunlight to create an area of radiation and intense heat that can easily ignite a fire.

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A stand magnifier is basically a plus lens mounted on legs that fix the distance from the lens to the object. They work based on the principles of angular and relative distance magnification.

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In literal terms – aspheric means ‘not spherical’. That’s because aspheric (or aspherical) lenses use an irregular curvature on its front profile – with different radii of curvature for different points on their surface. This results in a slimmer and flatter surface – especially at the edges of the lens. If you have a strong prescription, high index aspheric lenses can help accommodate this whilst letting you wear slim and aesthetically pleasing lenses. But it’s not all about aesthetics – aspheric lenses tend to offer more precise light guidance. Whilst spherical lenses can create mild distortions, the shape of an aspheric lens can help objects look more natural and reduce aberrations or image errors.

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Here at OpticsPlanet, we have a massive selection of Loupes and Magnifiers from the world's top brands! Carson Magnifiers are highly innovative, with unique options available for all kinds of uses. Nikon Magnifiers take the famous quality of their cameras and apply it to the glass in these optical devices. Bausch & Lomb Magnifiers take their optical quality, which is trusted for eyewear and contact lenses, and put it into these portable vision enhancers. OpticsPlanet offers some of the best loupes and magnifiers available at unbelievable prices. Since we know you're looking for helpful information to help guide you toward a wise purchase, we also have a great article on Buyer's Guide to Magnifier and Loupe, so be sure to check it out if you have any questions.

Aspheric lenses can come in a range of indexes. High-index aspheric lenses are a fantastic double-whammy solution for people who require strong prescription lenses.

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Spheric or aspheric lenses? How do they differ? And what do those terms refer to anyway? Well – let’s start with the basics. “Spheric” and “aspheric” refer to the shape of the lens. A spherical lens has a curved surface in all directions, in the same way a basketball does. Aspheric lenses, however, are curved in only some directions, and are flatter near the edges. This results in thinner and lighter lenses – great news for anyone with a high prescription who doesn’t want to deal with thick or bulky lenses. Today, we’re explaining what these two types of lenses are and why we recommend aspheric lenses here at Mouqy.

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When should you consider using aspheric lenses, rather than spheric ones? In our opinion – aspheric lenses simply offer a better visual experience for the wearer – with fewer aberrations and less distortion. Their lightweight nature makes them great for any pair of glasses that you plan to use regularly. However, it’s glasses wearers who have higher prescriptions who will really feel the difference. If you need a strong prescription, aspherical lenses are the way to go if you want to keep your lenses flat and sleek. However, if you only have very mild myopia, you can get away with either type of lenses. If you’re on a smaller budget, spherical lenses may be the way forward. However, it would be best if you discussed all possible options with your eye doctor before deciding whether aspheric lenses work best for you.

Double-aspheric lenses take things one step further! These lenses are irregular in curvature in both the front and rear surfaces of the lens. The result is a thinner profile that’s both even more lightweight and aesthetically pleasing.

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Both ‘high-index’ and ‘aspheric’ lenses have similar goals – thinner lenses for higher prescriptions. Lens index refers to how efficiently the lens material can bend light. The higher the index, the more effectively that lens can bend light (check our guide on lens indexes for more detail). It can be helpful to remember that these terms refer to two different aspects of a lens:

Handheld magnifiers are one of the most common types of magnifiers available. The hand-held magnifier typically has a handle that is attached to a lens through which the user will view an object - whether it is text or an image. Because the user has the ability to adjust the distance between the lens and the object. A Coddington magnifier is a magnifying glass with a single very thick lens with a central deep groove diaphragm at the equator that limits the rays to those close to the axis minimizes spherical aberration. This allows for greater magnification than conventional magnifying glass that typically has 10x up to 20x magnification.

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Aspheric lensesadvantages disadvantages

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Spheric lenses are a common type of lens with a simple curved design. The ‘spherical’ refers to the fact that the shape of the lens has a singular curvature on both its rear and front profiles – kind of like a magnifying glass. Spherical lenses tend to be thicker and will have a more prominent curve, especially as the prescription increases. They’re sometimes referred to as ‘big belly’ lenses – since they tend to be bulkier. This means that if you need a strong prescription, spheric glasses may not be ideal. The magnification can get quite obvious and give the wearer a warped ‘bug eyed’ look that’s not very aesthetically pleasing. The plus side? Spherical lenses tend to be cheaper because the manufacturing process is more straightforward.

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Loupes or hands-free magnifiers are optical lenses held close to the eye which is used for viewing objects with some moderate magnification. In contrast to a magnifying glass, a loupe is used at a close distance from the eye, is typically smaller, and has a shorter focal length. Loupes may be used to inspect optical elements, e.g., before and after cleaning operations and other types of small objects, e.g., in jewelry, biology, electronics, and watchmaking. Specialized loupes, often of binocular type, are used in surgery and dentistry.

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