Different Types Of Lenses Physics And Their Uses

FX cameras can crop their sensors to use DX lenses, although that wastes much of the capability of the FX cameras, but it doesn't waste the DX lenses. Methylene blue is often used for animal cells, while iodine in KI solution is used for plant tissues. Relate the impact of different types of waves on living cells to their frequency & the energy carried by the wave. The pupil is an opening that lets light into your eye. Optimise a water rocket A water rocket is a type of model rocket using water as its reaction mass. Color contact lenses have come a long way since the early tinted lenses. However, they can largely be grouped as follows: Standard Lenses. Here are some nice web pages on transcendental numbers: 1, 2, and 3. This makes it much easier to get a sharp image, especially with longer lenses which have a narrower depth of field. Mirrors are usually made of plate glass – one side has a metal coating or any other material that will serve as the reflecting surface. Glass lenses. Different Types of Intraocular Lenses: Their Comparative Benefits and Costs Artificial intraocular lenses are used to replace the eye's natural lens when it has been removed during cataract surgery. The first type of image we’re going to look at are flat color graphics. Lenses, unlike mirrors, generate images through refraction, and by making lenses of different shapes we can change the type of image that lenses "make. Metal List with Glossary of Common Scrap Metals Learn about different scrap metals from Non-Ferrous, Ferrous, and E-Scrap metals. Getting to know the most popular types of cameras for photography is the first step in finding the best camera for you. Engineers also use their knowledge of light energy, lenses and prisms as they design eye glasses, binoculars, cameras, medical equipment, satellites, optics and lasers. Do not include forces by an object acting through another object--only include the force due to the intermediate object. Thanks to their moving. A lamp is a device that produces light by the flow of electrical current , and it is a general form of artificial lighting. You will also use a slightly different type of light microscope called a stereoscopic dissecting microscope. in is an educational software that helps students develop flexible knowledge, effective problem solving skills, self-directed learning, intrinsic motivation. You're holding in your hand the very device responsible for tens of thousands of the most bizarre and unexplainable type of ghost photographs: Orbs. Although aimed at photographers, this book gives a good overview of different types of lenses, how they differ, and what you can use them for. Modern-day bifocal lenses are still made up of two parts. or have kids who are tough on their specs. You can use the same arguments to show that there is focusing if the potential of the middle electrode is either positive or negative with respect to the other two. Although there are different types of camera lenses, they all perform the same basic function: they capture the reflective light from the subject and focus it on the image sensor. Soft Contact Lenses. Their calls have. Contact lens wearers can use non-prescription UV-blocking sunglasses to protect their eyes from the sun. This helps the rays focus on your retina, instead of behind or in front of it. A refractor telescope uses a glass lens as its objective. ) A different type of image is formed when an object, such as a person's face, is held close to a convex lens. But in order to get astronomical data about different wavelengths, scientists have to use several different types of telescopes. The diagram below shows where different types of clouds are located in the sky. A device or phenomenon (such as a gravitational field). Did you see that or did I imagine it? Optical illusions are often created with mirrors and lenses, and here is a presentation that covers many different types of mirrors and lenses and how they work. These are more powerful than the 81 series. Chemistry solution offers 5 libraries with large collection of vector chemistry symbols and meanings, chemistry equation symbols, organic chemistry symbols, and chemical clipart: Chemical Elements Library, Chemical Drawings Library, Conformations Library, Laboratory Equipment Library, Periodic Table of Chemical Elements Library. DIFFERENT TYPES OF PLASTICS AND THEIR CLASSIFICATION The Society of the Plastics Industry (SPI) established a classification system in 1988 to allow consumers and recyclers to identify different types of plastic. There are other kinds of telescopes that also use mirrors, like Cassegrain designs. In our study of lenses, we saw that if the source was placed within a focal length of a converging lens, the lens yielded a magnified image on the same side of the lens as the source. These two philosophical "schools" deny any existence at all of an objective or universal knowledge. Lenses are used in glasses and contacts to help correct vision. This helps the rays focus on your retina, instead of behind or in front of it. Most basic compact cameras will fit in a pocket or small purse. "Disposable," as defined by the FDA, means used once and discarded. But where ocean waves vibrate only up and down, light waves wriggle in every direction. Types of Camera Lens. Different Types of Diodes Backward Diode. In this article we will learn about different types of engine. (If electricity is a form of energy, radio waves and electricity are the same sort of thing. Most basic compact cameras will fit in a pocket or small purse. A CD player works by shining a laser (which is a type of light) onto a disc. The Different Types of Binoculars. Types of lens There are two known types of lens these are: A convex/converging lens. Worker honey bees have a ring of iron oxide ("magnetite") in their abdomens that may be used to detect magnetic fields. (Draw three baby birds in the nest, begging and cheeping for food. Some examples are: Photodetectors: used to detect light, usually within a certain spectrum. You can also have a half note (2 beats) a quarter note (1 beat) an eighth, a sixteenth, and a thirty-second note. In this, they differ from most other arthropods, which have soft eyes. Worker honey bees have 5,500 lenses ("ommatidia") in each eye. In contrast to compound eyes, simple eyes are those that have a single lens. *Excluded Lenses:. Video: Comparing Canon’s USM and STM Lenses Using the 70D’s Dual Pixel AF A schematic of the different types of USM motors Canon uses in its lenses. Eyeglasses are the most common form of eyewear used to correct or improve many types of vision problems. For example, manufacturers who incorporate image stabilisation or low-dispersion elements in their lenses usually state this as part of the lens's name. From tumblers to champagne flutes, glassware is used to serve water, cocktails, beer, liquor, wine, coffee, tea and other beverages. Associated Activities Lasers, Let's Find 'Em! - Student teams research different types of lasers and their uses in technology today. The lenses bend or refract light to make the object beneath them appear closer. Are you obsessed with oversized lenses, partial to classic aviator shades, or absolutely stumped on which type of sunglasses you should wear? Click on any sunglass style below to learn more about a particular style, and then shop for the ones that speak to you. Advantages and Disadvantages Each telescope has its own advantage, for instance the refractor is better for observing the planets and the moon and the reflector for deep-sky objects (e. It is aimed at providing a resource for IoP members to use when trying to engage non-physicists with the subject. However, in most states, courts are moving away from awarding sole custody to one parent and toward enlarging the role both parents play in their children's lives. Soft Contact Lenses. The camera lens allows the light to enter into the camera and is typically convex. The first experiments we shall perform now are intended to show the main properties of convergent lenses. Use of an optical instruments, such as a magnifying lens or any complicated device like microscope or telescope usually makes things bigger and helps us to see in a more detailed manner. We can only fill the exact prescription your provider has given you. This means, once a wave has passed the particles return to their original position. When it comes to the fundamentals, there are many options available. There are many types of lenses that can be used, each for a different type of photography. Presbyopia occurs when individuals over the age of 40 have difficulty seeing objects close up. *Excluded Lenses:. Lenses, unlike mirrors, generate images through refraction, and by making lenses of different shapes we can change the type of image that lenses "make. If your favorite isn’t represented, tell us about it. 0, a 28 f/2. Ancient Egyptians, Babylonians, and Greeks, all had a sense of basic optics. A lens is said to be of greater power if it diverges or converges a beam of light more strongly by focusing them closer to the optical centre. Physics mirrors are where light can be reflected and reconvened to form images. The Contemporary Physics Education Project is a non-profit organization of teachers, educators, and physicists located around the world. ) A reflecting telescope uses two convex lenses. The first lens was a Tokina 12-24mm f/4 lens. Although some forms of biomass have been used for centuries – such as burning wood – other, newer methods,. Such people often require bi-focal lenses. The slit being in the focus of the lens, the light passes through the prism in a parallel beam. The glass lens is at the front of the telescope and light is bent (refracted) as it passes through the lens. Let me go through each filter type in detail and show the effects they produce in pictures (where applicable). Add up all the student totals for each beak type and then ask students to make a bar graph using these totals. Lenses obey Snell's law. Two types of image formed by mirrors are real image and virtual image. A lens is an instrument that refracts (bends) light in such a way as to allow the user to see the world around them in a different way. They will research to find the theory, applications, environmental impact, and cost related to a specific energy resource. These are more powerful than the 81 series. Two different types of mirror are concave and convex mirror with different properties. Many of us have a camera bag full of zoom lenses and prime lenses. Compound lenses are those constructed out of a combination of different simple lenses. Most persons develop low vision due to eye disease or health conditions. A lens is a piece of transparent material, usually circular in shape, with two polished surfaces, either or both of which is curved and may be either. Lens Combinations: Telescopes. Get regular eye exams to keep your peepers healthy and make sure your prescription stays up to date. defects of vision and their correction: The eye may gradually lose its power of accommodation. The sequences are also found in many fields like Physics, Chemistry and Computer Science apart from different branches of Mathematics. Associated Activities Lasers, Let's Find 'Em! - Student teams research different types of lasers and their uses in technology today. For every pair sold, a pair is distributed to someone in need. Quantum supremacy is here, researchers from Google claim. With hi-index lenses, vision can be corrected with less material, making the lens much thinner. 6eV for the non-symmetric case (i. Browse by lens type. Some of them are natural while others are artificial. What follows below is an attempt to unpack the different types of lenses that most manufacturers offer in the DSLR market. The SI unit of force is Newton, denoted by N. For example, manufacturers who incorporate image stabilisation or low-dispersion elements in their lenses usually state this as part of the lens's name. One N is the force which when acts on a body of mass 1 kg produces an acceleration of 1 m/s². Home >> Cinematography >> Types of Lenses. The most common types of lenses are Wide Angle, Standard, Telephoto, and Zoom lenses. The functions of each type of eye movement are introduced here; in subsequent sections, the neural circuitry responsible for three of these types of movements is presented in more detail (see Chapters 14 and 19 for further discussion of neural circuitry. Biometry is the method of applying mathematics to biology. Casual sunglasses are typically not designed to handle the intensity of action sports. Type R, S, and B thermocouples are “Noble Metal” thermocouples, which are used in high temperature applications (see thermocouple temperature ranges for details). Prosthetic lenses. Lenses are one of the most important considerations in photography. In this interview, Joe Wragg from LIG Nanowise, talks to AZoOptics about their range of Microsphere Enabled Lenses that can be used for Imaging Volcanic Mineralogy Samples. All glasses include FREE anti-scratch coating, single vision lens, UV protection, hard case, and cleaning cloth. By continuing to browse the site, you are agreeing to our use of cookies - if you wish to opt-out of non-essential. It is this type of lens that is most commonly used in corrective lenses. – Lens curvature, width, position, type of glass – Some can be fixed, other vary with focal length, focus (e. Convex lenses. Compound lenses are those constructed out of a combination of different simple lenses. 7 Different Types of Strength and Their Benefits. 3 Types of Microphones used in Music. You have an awesome list of hobbies! i have already done some of this list. All 400,000 species of plants and a few species of bacteria use sunlight and the process of photosynthesis to obtain their energy. Use this approach when you have more information than you can cram into a print ad. Coupling materials of water, grease, oils, or commercial materials are used to remove the air gap between the transducer and the component being inspected. We will use this so-called thin-lens approximation in this unit. E a = E b), and five different incident energies from 34. Welding is defined as a process where two or more pieces of metal or thermoplastics are fastened together by use of heat and pressure. A CD player works by shining a laser (which is a type of light) onto a disc. This type of lens features a large numerical aperture and a better resolution and thus is often used for research that requires detailed observation. In each high school course, literacy is addressed in the activities in the form of vocabulary, comprehension, fluency, and writing activities. When this pioneering surgery received FDA approval, there was very little choice and generally a monofocal intraocular lens was implanted during. Energy Transfers & Efficiency – conservation of energy, efficiency calculations. These two philosophical "schools" deny any existence at all of an objective or universal knowledge. The light rays are refracted by the cornea onto the lens. Their technique could be used to obtain optical images of biological samples that are hidden beneath layers of opaque tissue (Opt. 1a: Each animal has different structures that serve different functions in growth, survival, and reproduction. Here are some nice web pages on transcendental numbers: 1, 2, and 3. If used on aircraft, the brushes would need repltlacement after one hour of operation. Use the K'nex pieces to explore the various types of bridges. If they did change, it would not just be the speed of light which was affected. A reflector telescope uses a mirror as its objective. And it has two focal points, one on this side, so that is one focal point. The glass lens is at the front of the telescope and light is bent (refracted) as it passes through the lens. Encourage students to use different diary entry ideas within their pairs and to choose different items to emulate, as they will be writing the diary together. In liquid lasers, light supplies energy to the laser medium. In the case of modern soda-lime glass, a quick cooling will produce a glass transition at about 550° C. Another name for this type of lens is a positive lens. Used on a film camera, at some or all settings the corners will go black. You will also use a slightly different type of light microscope called a stereoscopic dissecting microscope. This is why the Hubble telescope is able to gather pictures so clearly. Zoom lenses (or varied focal length lenses) are by far the most common type of lenses known to the average consumer. All types of microscopes are used based on their purpose and the results that the scientist or the observer is trying to achieve. For the first time, a quantum computer has solved a problem that can’t be performed by a standard computer — at least not within a. She observed Minca using a different color palette for each type of spell. Organisms use different types of adaptations to aid in their survival. Contact Lens, Lens Care Systems, & Solution Types information on the different types of contact lenses and solutions used to disinfect, store, and clean contact. *Excluded Lenses:. The rules of ray-tracing have a simple consequence for lens combinations: if two lenses are mounted one after the other, then the image formed by the first lens becomes the object for the second lens. types of camera lenses and their functions When you're ready to move from a beginner level, fixed lens camera to something more advanced, you're almost certainly going to turn to interchangeable lens cameras (ILCs), either DSLRs or mirrorless ILCs. They need to be mentally challenged, and thrive off solving critical thinking issues. Descriptions Of Various Baseball Pitches. Some Types of Force. I used a variety of focal lengths in order to illustrate this effect. These two types of lenses - a double convex and a double concave lens will be the only types of lenses that will be discussed in this unit of The Physics Classroom Tutorial. Other papers are too impure and will scratch the optical coating on the lenses. The process, developed by Nagoya University researchers in Japan, could be up-scaled for manufacturing. Types of Camera Lens. Medical lasers can also be used to reattach retinas and can be used in conjunction with fiber optics to place the laser beem where it needs to be. Light from an object passes through the cornea which is a transparent dome like structure covering the iris. ) A reflecting telescope uses two convex lenses. Single voltage models are for more defined single voltage applications. This is the case because with zoom lenses you can go telephoto or wide-angle at the push of a button. Certain types of these are excellent candidates for solar cells or light emitters. A refractor telescope uses a glass lens as its objective. It comes with interactive. Lenses, unlike mirrors, generate images through refraction, and by making lenses of different shapes we can change the type of image that lenses "make. A fourth type, not often found in building structures, is known as a simple support. If you're looking for something reliable and versatile, then you ought to start with dynamic mics. Students will be asked to make additional observations to further their knowledge of lens properties. As the traditional wideangle lens used to have a focal length of around 28mm, most kit lenses start from 18mm to meet this length (ie, 18 x 1. The earliest telescopes -- like the ones Galileo used -- are the simplest: we call them refractors. Another name for this type of lens is a positive lens. glass), bounded by two surfaces, of which atleast one is buldged. This type of lens is thicker at the centre than the edges - a positive lens. Fast, free shipping both ways. Even though diverging lenses look very different than converging lenses, you can find their magnification values using the same formulas as above. The animations below demonstrate both types of wave and illustrate the difference between the motion of the wave and the motion of the particles in the medium through which the wave is travelling. Lenses Lenses refract light in such a way that an image of the light source is formed. Mirrors and lenses both have the ability to reflect or refract light. Like the loom on which fabric is woven, general assumptions and interpretive. The particular distance through the system is characterized by either the DIN or JIS standard; all finite conjugate microscopes are either one of these two standards. The cheapest start at 10-15k$, without lenses, but their resolution and image quality is hard to beat. Nowadays, cameras come in many different forms. If you want to sell or trade your own equipment, just ask for a quote. What follows below is an attempt to unpack the different types of lenses that most manufacturers offer in the DSLR market. The earliest telescopes -- like the ones Galileo used -- are the simplest: we call them refractors. Literary lenses provide different methods for the analysis of literature. The quantitative types argue that their data is 'hard', 'rigorous', 'credible', and 'scientific'. So please come in, look around, and learn something. Camera Lenses. These common features serve as the baseline, on top of which licensors can choose to grant additional permissions when deciding how they want their work to be used. accommodation of the crystalline lens, choice of corrective lenses). Prime lenses tend to be more compact and lightweight than zoom lenses. Types of Light Bulbs and Their Uses. You can view individual cells, even living ones. Kogan Page, 2006. And having to make a decision on the type of cataract lenses you would like can sometimes feel a little bit overwhelming, especially as there are so many different lens types. The creative use of the lens gives photography its expressive qualities - they shape the way you "see" the world through the viewfinder. There are many different types of microscopes, from little plastic toys for kids to highly advanced scanning microscopes for scientists. Thus, this is all about what is a transistor and different types of transistors and its applications. This will help you know how to fix the distortion. Associated Activities Lasers, Let's Find 'Em! - Student teams research different types of lasers and their uses in technology today. They can be used as accent mirrors, wall mirrors , coasters, vanity mirrors, cabinet door alternatives , in jewelry boxes, globes, bath bars, and even for. Prescription eyeglasses starting at $95. A dye laser is an example of the liquid laser. Physics is The study of matter and energy, and their relation with each other. You can also have a half note (2 beats) a quarter note (1 beat) an eighth, a sixteenth, and a thirty-second note. Chemistry solution offers 5 libraries with large collection of vector chemistry symbols and meanings, chemistry equation symbols, organic chemistry symbols, and chemical clipart: Chemical Elements Library, Chemical Drawings Library, Conformations Library, Laboratory Equipment Library, Periodic Table of Chemical Elements Library. To examine and measure real and virtual images in simple optical systems. He named cells after the Latin word cella, meaning room. We call these types of cells autotrophs. a, {3, and 'Yare small and may be taken as equal to their tangents. After the initial 30 day period, on any order, your order is refundable in store credit only. Types of Lenses: Master Class on Film Camera Lenses. Sentences come in a variety of shapes and lengths. Magnification. Telescopes are able to see very distant objects that are very small to our sight and magnify them so we can see the details. Linear position. Prime lenses tend to be more compact and lightweight than zoom lenses. A quick article about different types of welding processes. Physical optics will help you understand the phenomena of light wave interference, diffraction, and polarization; the use of thin film coatings on mirrors to. Roots - how much water is used by different plants - what is the effect of temperature, sunlight, etc. Wide-angle lenses are also a great way of showing your subject in their environment. The microscopes have varied applications and modifications that contribute to their usefulness. Draw a dot to represent the object of interest. mathematical physics, mathematics pertaining to physical problems. The second was a Nikon 35mm f/1. Unit Representation. Understanding the tools of the trade is as important as understanding how to tell a compelling story. Making use of the fact that. CPEP materials present the current understanding of the fundamental nature of matter and energy, incorporating the major research findings of recent years. Different types of motors and their use. Sample Assessment Questions with answers 1. The former can be drawn with reference to the X and Y axes, whereas, the latter also includes the Z axis. DO NOT EVER, NOT NOW, NOT EVER, USE ANYTHING BUT LENS PAPER TO CLEAN THE LENSES. Two different types of mirror are concave and convex mirror with different properties. You will also use a slightly different type of light microscope called a stereoscopic dissecting microscope. And now i can add more on my list. However, in most states, courts are moving away from awarding sole custody to one parent and toward enlarging the role both parents play in their children's lives. Only their frequency is different. They are mostly used by commercial shooters and (rich) landscape photographers. When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus. What are the different types of digital cameras? Which digital camera should I use and buy? In this guide, we describe in detail what each digital camera out there is and who they may be suitable for, depending on your budget and intended use. Fast, free shipping both ways. Science Questions and Answers from Chegg. The most widely used form of renewable energy is biomass. lens Light rays converge when passing through a biconvex lens and diverge when passing through a biconcave lens. Learn More. The last one, through the combined use of two lenses, will show how some important optical instruments such as the telescope and compound microscope work. These terms are sometimes used not only to denote a volume or mass, but also to represent an amount of energy. These people need to accommodate as much as possible in order to reduce their farsightedness to a lower level. Even though the image making happens inside the camera body and on the film itself, the lens is what handles the light and determines the quality of the resulting image. find x-y coordinates on CIE diagram. This has nothing to do with this, but you might want to add this on your list of hobbies. This lens allows more oxygen to pass through and reach the eye cornea. Interactive solvers for algebra word problems. For such thin lenses, the path of the light through the lens itself contributes very little to the overall change in the direction of the light rays. PMMA is a lightweight, crystal-clear, glasslike polymer used in airplane windows, taillight lenses, and light fixtures. A lens is an instrument that refracts (bends) light in such a way as to allow the user to see the world around them in a different way. One of the most common lens is the Plano - Convex lens, this lens has one side which is flat, and the other side which is curved like a sphere. Their hands are embellished with gold bracelets, thick rings and long candy apple-colored nails. It can be useful to try different types of camera lenses for different perspectives and composition. While no one retailer had the best prices across the board, there were a few standouts, including 1 800 Contacts, Contact Lens King and Costco. Primary LCA correction is usually performed using an achromatic doublet lens, which is made of positive and negative lens elements of different refractive indices (Figure 3). This list is by no means complete. The Galilean telescope could be used for terrestrial and celestial purposes interchangeably. The size of the filters depend on the diameter of the lens and they usually are like; 49mm, 52mm, 55mm, 67mm, 77mm, and so on. Some of them are natural while others are artificial. Assessment and evaluation studies may take place at the subject, department, or Institutional level, and range in size and scope from a pilot study to a complex project that addresses a number of different topics, involves hundreds of students, and includes a variety of methodologies. Astronomers study planets, stars, galaxies, and other celestial bodies. This has nothing to do with this, but you might want to add this on your list of hobbies. The physical property is referred to as thermometric property. A dye laser is an example of the liquid laser. In our study of lenses, we saw that if the source was placed within a focal length of a converging lens, the lens yielded a magnified image on the same side of the lens as the source. Please note that while attending the MA1 evening lecture is optional, the MA1 assignment is NOT optional and must be turned in before the deadline for your division for credit. There are several options when pursuing this form of degree. So what are the effects of lensing?. Never reuse any lens solution. 8 and a 28 f/3. Analysis and comparison between different technologies will help us to adopt the most efficient and beneficial technology given a specific set of conditions. Knowing which lens to use at what time is imperative. The two major manufacturers, Canon and Nikon, both have different options depending on whether you’re getting a lens for a full-frame or crop sensor camera. So let's think about what this lens will do to the images of different objects. This list defines 633 sciences, arts and studies of various degrees of respectability and rarity, ranging from the common and esteemed (chemistry) to the obscure and quirky (peristerophily). Compound microscopes are light illuminated. It is one of the most mature cell types and the first to be used commercially. These lenses are fantastic for certain purposes, but are often overused without real purpose - use them with caution. Students will be asked to make additional observations to further their knowledge of lens properties. Only a few of the thermo books even discussed a definition for energy. In a nut shell, it enhanced their already remarkable "mystic" powers. In fact, there is a specific type of doctor for almost every major system located in the human body. Since all DX lenses are also G lenses without aperture rings, DX lenses won't work on manual focus cameras. They used clear calcite crystals to form the lenses of their eyes. lenses (L2 and L3), 1 long focal length double convex lens (L4), 1 double concave lens (L5), diopter gauge, meter stick, ruler, flashlight. Nearly every lens has a line of symmetry down its center (which may or may not be its geometric center, but usually is). in is an educational software that helps students develop flexible knowledge, effective problem solving skills, self-directed learning, intrinsic motivation. Convex lenses are thicker at the middle. I’m not going to get into talking about specific lenses but want to give a brief introduction to some of the terms and types of lenses that you’ll come across as you begin to explore the DSLR lens market. Other variations include cantilever and moveable bridges. Physclips provides multimedia education in introductory physics (mechanics) at different levels. Their technique could be used to obtain optical images of biological samples that are hidden beneath layers of opaque tissue (Opt. Bifocal lenses have been around since the late 18th century and were created when Benjamin Franklin cut two lenses in half (each with different corrective powers) and glued them together. Geometrical optics will help you understand the basics of light reflection and refraction and the use of simple optical elements such as mirrors, prisms, lenses, and fibers. All types of microscopes are used based on their purpose and the results that the scientist or the observer is trying to achieve. Physics to Go 2 Physics Tricks This section describes recipes for 20 physics-based tricks. Although there are different types of camera lenses, they all perform the same basic function: they capture the reflective light from the subject and focus it on the image sensor. This microscope is the most commonly used. accommodation of the crystalline lens, choice of corrective lenses). Types of Grant Programs NIH uses activity codes (e. Medical lasers can also be used to reattach retinas and can be used in conjunction with fiber optics to place the laser beem where it needs to be. The lens in the CD player helps focus the laser onto the disc. Most modern macro lenses use an autofocus system. Explore Lenses From telephoto to fisheye — and every lens type in between — switch up your perspective and discover which lens is best suited for your lifestyle and needs.