3/22/2021 0 Comments Canon Camera Lenses Explained
If the name of your lens starts with EF, EF-S, EF-M or RF, this indicates what type of lens mount your camera has.Here, Canon Collective ambassador Jenn Cooper sheds light on what those numbers on the lens mean, covering everything from focal lengths and aperture values to the different types of lenses and when to use each one.
Canon Camera Lenses Explained Series Of ConvexInside each lens is a series of convex and concave optical elements that work together to bend light and refract it into a single sharp focal point. For example, a lens with a focal length of 24mm will offer less magnification than a lens with a focal length of 200mm. This makes them extremely versatile, which is why many photographers consider them to be essential especially for travelling photographers who dont want to carry multiple lenses. However, because they have fewer lens elements, and fewer moving parts in general, they typically offer superior image quality. This makes them suitable for portraits and product photography, or any type of photography where a soft blurry background is desired. These wide apertures also allow more light into your camera, making them ideal for shooting in low light conditions. For example the EF 100-400mm f4.5-5.6 IS II USM lens is often used for wildlife and sports photography, allowing the photographer to zoom in on the animal or athlete when it is not possible to get close to them. This makes them suitable for landscape photography, or any type of photography where you are shooting in tight spaces, like architectureinterior photography. Macro lenses such as the EF-S 35mm f1.8 Macro IS STM, enable the objects to look larger than life size with greater detail. This is ideal for magnifying insects, flowers or manmade objects and capturing them in extreme detail. It can be adjusted much like the irises of the human eye, which dilate or contract depending on the available light. In photography, the aperture of a lens is measured in F-numbers or F-stops and is typically expressed on your lens like the following: F4.5-5.5. In this example, the minimum aperture for that lens ranges between f4.5 and f5.5, depending on what focal length youre using. In general, the smaller the F-stop, the larger the aperture opening, and vice versa. A small F-number, such as f1.8, will give you a sharp focal point with a soft blurry background. A larger F-number like f16 will give you a larger depth of field, resulting in both the foreground and background being in focus. On the other hand, f16 will limit the amount of light passing through the lens, meaning you will need to compensate by selecting a higher ISO or slower shutter speed to achieve the same exposure. The relationship between these three functions is commonly known as the Exposure Triangle Basics. ![]() Higher ISO levels, such as ISO 3200 or 6400, allow your camera to operate in low light conditions. However, the trade off is that high ISO levels introduce digital noise to your images. Where possible, its always best to shoot with a low ISO to maintain the best image quality. This allows you to use the same camera body with a variety of different lenses. For example, a DSLR camera gives you the flexibility to use an EF 50mm f1.4 USM prime lens when shooting portraits or an EF 70-300mm f4-5.6 IS II USM telephoto lens when shooting wildlife.
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