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Firmware updates unlock new features and boost performance in Canon's pro mirrorless cameras, including 400MP resolution in the EOS R5 and more.

Unleash your ambition and make the whole world cinematic. When creativity counts, filmmakers choose Cinema EOS for exceptional image quality and control.

Generally, f-numbers are used to indicate the amount of light that passes through the lens. The smaller the number, the greater the amount of light passing ...

We are bringing the latest innovation to this year’s International Broadcasting Convention, one of the world’s biggest media and technology shows.

In the early days, all lenses were spherical. They are the easiest lens shape to make, but are not best suited to rendering a sharp image because they cannot make parallel rays of light converge at the same point. This causes a problem called spherical aberration. Lens designers discovered that an aspherical lens shape would eliminate this type of aberration, because the curvature of the lens could be used to converge the light rays to a single point. But knowing the theory is one thing − putting it into practice is quite another. The degree of asphericity is so minor that special manufacturing processes were created to stay within the 0.1-micron tolerance required. Measuring the curvature requires even greater accuracy. It was not until 1971 that the first SLR camera lens with an aspherical lens element was produced, the Canon FD55mm f/1.2AL. But it was not perfect. In fact, it took another two years before manufacturing techniques reached the levels required to achieve really large gains in image sharpness. Today, aspherical lens elements are so precisely ground and polished that if the degree of asphericity is even 0.02 micron (1/50,000th of a millimetre) away from ideal, the element is rejected. Aspherical lens elements help to compensate for distortion in wide-angle lenses, and compensate for (or even eliminate) spherical aberrations in lenses with a large maximum aperture. They also enable Canon to produce more compact lenses than was previously possible using only spherical lens elements. This is because traditional lens designs often involved complex arrangements of multiple lens elements to minimise aberrations, but a single aspherical lens can do the same job, resulting in a lighter, more compact lens with superior sharpness.

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Equipped with 4K UHD resolution, a 20x optical zoom, Hybrid Auto Focus, numerous IP streaming and control protocols, you can engage your audience in new ways.

Ranked among the top 50 engineering schools worldwide, Waterloo Engineering is committed to leading engineering education and research.

Photographers sometimes like to refer to lenses loosely as "glass", but of course they're much more complex than just pieces of glass, and the optical elements in modern lenses can include materials such as fluorite and plastics as well as different varieties of glass. All these materials, each with unique properties, are used to improve optical performance, from reducing aberrations to enhancing sharpness and contrast. In this guide, we'll explore some of the materials and technologies used in lens elements and how they contribute to improving image quality. What is chromatic aberration? Fluorite lenses Spherical lenses vs aspherical lenses Manufacturing aspherical lens elements Ultra-low Dispersion glass Blue Spectrum Refractive (BR) elements

Materials with lower dispersion, such as fluorite, can help; so can new technologies such as Blue Spectrum Refractive (BR) lens elements, shown here, which can control the path of short-wavelength blue light in particular, notably minimising blue fringing.

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Glass-moulding allows for manufacturing in quantity, and the resulting lens elements retain the scratch- and heat-resistant properties of glass. Although manufacturing them is still a precision process, moulded elements are less expensive to produce than ground elements, making their use in consumer lenses feasible. In 1990, Canon developed a fourth technology to produce "replica" aspherical lenses, using a resin to form an aspherical lens surface layer on a spherical lens element. Optical resin is added on a spherical glass lens, pressed into shape by an aspherical surface press mould, and then hardened by ultraviolet light. This process can be used with different glass materials and sizes of glass base, offering high design flexibility. In addition to being cost-effective, replica aspherical lens elements are also lighter than their ground counterparts. As the only manufacturer using four different aspherical lens production technologies, Canon is able to cater to diverse needs by choosing the most appropriate of these technologies for each lens element required.

Led by Dr. George Shaker, an adjunct associate professor in the Department of Electrical and Computer Engineering, the team's innovative radar technology enables non-invasive, continuous glucose monitoring that is essential for those managing diabetes.

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We are the largest engineering school in Canada, with over 10,900 students enrolled in 2023. In 2023/24, external research funding from Canadian and international partners exceeded $79.3 million, a strong indication of our extensive industry partnerships and the excellence of our engineering research programs.

On Friday, November 1, the Faculty of Engineering and guests gathered to celebrate an enduring legacy in engineering education: the pioneering textbook Microelectronic Circuits, co-authored by professors Adel Sedra and K.C. Smith. This iconic book has shaped the academic journey of countless students worldwide. The event, held on the 5th floor of Engineering Building 7, featured Adel Sedra, a former Dean of Waterloo Engineering, as the guest of honour for the unveiling of a custom-designed bookcase dedicated to this important work.

Find out how the tech in Canon's IS lenses works to keep images sharp despite camera shake, which IS mode to use for best results, and more.

Canon's innovative Blue Spectrum Refractive (BR) element is sandwiched between two glass lenses, one a convex lens (top) and the other a concave lens (bottom), to control the path of blue light and minimise chromatic aberration.

May 19, 2005 — Otherwise I believe Ansel Adams mentions a wratten filter ... Almost as important to me is the intended use, which is to show tonal convergences ...

When light passes through a lens, it refracts – that is, it bends. What's more, different colours (wavelengths of light) are refracted to different degrees, with the result that it also breaks up into its constituent colours, just like light passing through a prism. This phenomenon is called chromatic aberration. It means the lens is not able to bring all the different colours to the same focus point and produces a fuzzy image. In the worst cases, coloured fringing is seen along some edges. Chromatic aberration is inherent in glass elements because of the physical properties of glass, but other materials can alleviate the problem to some extent. The lower the refractive index of the lens material, the less the light bends and the sharper the image. Similarly, the lower the dispersion ratio, the less the light is broken up, which makes it easier to correct chromatic aberration. It's worth noting that in addition to optical solutions, Canon has developed advanced ways to tackle chromatic aberration in images in post-production. Canon's Neural Network technology uses artificial intelligence to analyse images, detect chromatic aberration, and correct it intelligently, resulting in clean, crisp images with true-to-life colours.

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Chromatic aberration is inherent in glass lenses because different wavelengths of light are refracted to different degrees.

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Waterloo Engineering invites our future undergraduate students and their supporters to campus for Fall Open House to explore what the University of Waterloo has to offer!

With a robust and weatherproof housing plus 4K UHD resolution, 15x optical zoom, 12G-SDI and Dual Pixel CMOS AF, the CR-X500 is the ideal PTZ camera for remote productions and monitoring.

Plastic moulding (B) is the most flexible, making it possible to produce a huge variety of lens shapes at a lower cost. This is the technology used in compact, lightweight lenses such as the Canon RF 50mm F1.8 STM and RF-S lenses – the required shapes cannot be produced using glass moulding, and ground aspherical elements would be cost prohibitive.

TECNO DISTRIBUZIONE srl è nata nel 2001. La mission dell?azienda è quella di diventare punto sicuro nella distribuzione di prodotti tecnologici legati al ...

Fluorite is a naturally occurring crystal, but in nature it's very small. Canon grows its own synthetic fluorite crystals and developed techniques for grinding the fragile substance into flawless lens elements.

In an aspherical lens, the subtle curvature of the lens can be used to converge the rays of light and bring them to a sharp focus. The degree of asphericity is greatly exaggerated in this illustration – it is not visible to the naked eye in an actual aspherical lens element.

Round Mirror. 10mm Dia. 1064nm 45°, Nd:YAG Laser Line Mirror. Product code. #26-434. Price. $ 170.00. Availability. Contact Supplier. Product details.

Founded in 2015 by three Waterloo alumni from the Department of Electrical and Computer Engineering — Amol Karnick (BASc ’95), Sina Ghanbarzadeh (MASc ’14, in memoriam) and Dr. Karim Karim (BASc ’99, PhD ’03) — KA Imaging is built on one shared goal: to deliver significant social impact by advancing X-ray imaging technology.

The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg, and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is co-ordinated within the Office of Indigenous Relations.

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Blue (short wavelength) light is particularly troublesome for lens engineers because it's hard to correct its path through a lens element in the same way as longer-wavelength green and red light, which means it can cause blue fringing. However, in August 2015, Canon introduced the EF 35mm f/1.4L II USM, the first lens to feature a Blue Spectrum Refractive (BR) element. The BR element uses a new organic optical element that has different dispersion characteristics from standard elements. It is sandwiched between concave and convex glass lenses, to control the path of blue light and minimise chromatic aberration. Canon continues to develop new optical materials to further expand the possibilities of lens design and manufacture. Canon's Multi-layer Diffractive Optical Element technology, for example, utilises an optical phenomenon to emulate the characteristics of aspherical and fluorite elements, enabling smaller, lighter telephoto lenses with improved performance at smaller apertures.

Ground aspherical lens elements are individually ground and polished to an extremely high level of precision. The process is suitable for different types of glass and can be used to produce aspherical lens elements with large diameters relative to spherical lenses. Grinding and polishing an aspherical lens element is a lengthy and expensive process, but manufacturing developments now also make it possible for aspherical lenses to be moulded. Plastic moulded (PMo) aspherical lens elements are formed by injecting optical-grade resin into an aspherical surface mould, with coatings then applied to finish the lens. These lens elements have the advantage of light weight, can be mass produced in larger quantities at lower cost, and have made it possible to greatly improve the image quality of entry-level lenses. Large-diameter glass-moulded (GMo) aspherical lenses are manufactured using various types of optical glass softened by high temperatures and then shaped in an aspherical metal mould. Naturally, the moulds need to be made very precisely to ensure that the molten glass is exactly the right shape. They must also take into account the change in the elements' dimensions once the glass has cooled and been polished.

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The RF 85mm F1.2L USM is the first of Canon's next-generation RF lenses to incorporate BR technology. It also has UD glass and a ground aspherical lens element to eliminate spherical aberrations caused by a large maximum aperture.

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It's easy to take the technology behind autofocus for granted. Find out about the history of Canon's Ultra Sonic Motor (USM) and STM technologies and how they deliver fast, smooth and quiet AF capabilities.

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Perfectly spherical lenses paradoxically cause aberrations because they do not bring rays of light to a sharp focus. Canon developed aspherical lenses that use the curvature of the lens to converge the light rays to a point.

The emergence of UD (ultra-low dispersion) glass and Super-UD glass came after Canon had successfully incorporated fluorite into some of its lenses. Using optical glass rather than fluorite to correct chromatic aberrations is more cost-effective, so Canon directed its research into high-performance lenses manufactured from optical glass. Over the years, Canon has used more than 100 different types of glass in its lenses, each with slightly different properties. UD glass is similar to fluorite in that it has a low refractive index and low dispersion. Although it is not quite as good as fluorite, its performance is significantly better than ordinary optical glass. So by using UD glass Canon has been able to manufacture a range of lenses with superior performance and at a lower cost than before. In several L-series lenses, both UD glass and fluorite lens elements have been combined to produce optimum results. The technology is suitable for different kinds of lenses, from wide-angle to super-telephoto.

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A handy guide to which Canon cameras have which features –weather-sealing, IBIS, Animal Eye Detection AF, a Vari-Angle screen and more.

Glass moulding (C), although less flexible than plastic, produces aspherical lens elements with the durability and other benefits of optical glass, at a lower cost than ground elements.

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A compact IP65 rated PTZ camera offering 4K resolution, 20x Optical Zoom and IP streaming and control for a wide range of applications.

A Waterloo Engineering research team has designed a system that fits into a smart watch and eliminates the need for diabetics to have to prick their fingers or rely on invasive wearable patches with micro-needles to track their blood-sugar levels.

Enjoy high quality performance, low cost prints and ultimate convenience with the PIXMA G series of refillable ink tank printers.

Great autofocus and low-light performance, 40fps, pro video features – six ways the full-frame hybrid EOS R8 can widen your creative horizons.

Our mirrorless cameras are easy to carry and distil the best of Canon technologies into a compact body with interchangeable lenses.

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Waterloo spinoff company KA Imaging is helping to improve health care diagnoses in remote areas with its advanced X-ray imaging technology.

Find out how the tech in Canon's IS lenses works to keep images sharp despite camera shake, which IS mode to use for best results, and more.

The RF lens mount is at the heart of Canon's EOS R System. Find out about the many innovations and design advances it has made possible.

Multi-layer Diffractive Optical Element is a technology that combines the characteristics of aspherical and fluorite elements. Find out more.

Fluorite is a naturally occurring crystal with three special properties that make it eminently suitable for use in lenses − it transmits infrared and ultraviolet light well, has a very low refractive index, and has low dispersion. This means fluorite lens elements greatly reduce chromatic aberration, compared to glass lenses. Even back in the 19th century, natural fluorite crystals were used in microscope lenses, but in nature, fluorite grows in very small crystals and it's not suitable for use in photographic lenses. To overcome this problem, Canon grows its own synthetic fluorite crystals in large enough quantities to create photographic lenses from them. The next stage is to grind the fluorite into lenses − another challenge, since fluorite is difficult to grind. However, the engineers at Canon developed a new grinding technique to ensure flawless fluorite lens elements. The downside is that it takes four times longer to grind a fluorite element than a glass element − one of the reasons for the increased cost of a Canon L-series lens. The results, though, are lenses that all but eliminate chromatic aberration, resulting in sharper images since the light is recorded as a point rather than a blur of colours. The first Canon lens to contain a fluorite element was the FL-F 300mm f/5.6, produced in 1969.

Explore our Chemical Engineering program, where you'll learn to combine principles of chemistry, physics, biology and mathematics to design and optimize processes that produce, transform and transport materials. From developing new materials to creating sustainable energy solutions, chemical engineers are at the forefront of innovation. Hear from our professors, current students and alumni, and get your questions answered at this interactive AMA webinar.

Learn about RGB and CMYK colour systems. Find out how Canon inks and paper are designed to work in harmony with printers, providing colour accuracy.

Close the distance with unrivalled clarity. Capture, control and deliver superb quality content with Canon’s imaging eco system.

Explore our Nanotechnology Engineering program, where you’ll learn to manipulate matter at the atomic and molecular scale, typically between 1 to 100 nanometers. With applications spanning electronics, healthcare, energy and environmental protection, this rapidly growing field offers the chance to develop groundbreaking solutions. Hear from our professors, current students and alumni, and get your questions answered at this interactive AMA webinar.

Canon employs four different technologies to produce aspherical lenses. Precision ground elements (A) require the most time and resources.

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Spherical lenses are the easiest lens shape to make, but they disperse the rays of light passing through them so that they do not focus at the same point. This results in a lack of sharpness and clarity, particularly at the edges of an image and at wider apertures, posing a significant challenge to photographers seeking to maximise depth of field without compromising image quality.

The Best Feature Documentary category of the 2020 Oscar nominations was particularly dominated by productions filmed with Canon kit.

Wide-angle lenses are prone to barrel distortion (exaggerated here), while telephoto lenses are prone to the opposite, pincushion distortion. Aspherical lens elements can help to correct such distortions, although their effect will vary depending on their position within the configuration of the lens, relative to other elements. For example, aspherical lens elements near the front of the lens configuration will be effective in correcting barrel distortion.