Buzz
1. Canon Wide-Angle Lens
Wide-angle lenses have significantly shorter focal lengths compared to standard lenses. These lenses allow capturing more in the frame, making them valuable in architectural, interior, and landscape photography, where the photographer may not move too far to capture the scene.
They are used when photographers want to emphasize the size or distance between foreground and background objects. Objects close by appear very large, while objects at a moderate distance appear small and distant.
This magnification effect can be used to make foreground objects stand out when capturing expansive backgrounds. Wide-angle lenses with large image circles are typical for standard design lenses with the same focal length.
This large image circle allows for significant tilts and shifts with the camera view or a wide field of view. A lens is considered wide-angle when it encompasses an angle of view from 64° to 84°. Conversely, it becomes a 35–24mm lens in 35mm film format.
1.1. Characteristics of Wide-Angle Lens
Longer lens, magnifying objects more and compressing distance (focusing on the foreground). It blurs the background due to a large depth of field. Wider lenses tend to magnify the distance between objects.
Wide-angle lenses exaggerate perspective more when the camera is not squared up with the subject. Parallel lines converge at the same rate but converge more due to a wider total field.
Different lenses often require different camera-to-subject distances to maintain the size of an object. Changing the perspective can disrupt indirect sightlines. It alters the relative size of the subject and foreground.
1.2. Photography Conditions
When needing to capture the entire space of an image even from a narrow shooting angle. Ideal for landscape and reportage photography.
1.3. Pros and Cons
Captures maximum image space. Maintains a deep field of view while preserving overall sharpness. Sports events benefit from a panoramic view with an ultra-wide angle.
Wide-angle lenses are affected by height and shooting angle, but this can be overcome. Distortion, especially at the four corners, can be corrected by adjusting the camera position.
1.4. Considerations for Use
When shooting landscape photos
Scenery: In photography, capturing landscapes with a wide-angle lens requires attention to the scenery. It involves finding the appropriate ratio of the scene's elements.
Distortion: Under the influence of a wide-angle lens, the camera's position significantly impacts the image quality. Improper camera placement disrupts the virtual horizon, leading to an unbalanced image. Photographers must step back, position higher, or use Photoshop to correct the alignment.
Landscape Photography Equipment
Capturing landscapes with a wide-angle lens also requires supporting accessories. Some functions include reducing light intensity during daytime shots or creating contrast. A cable release can be used to prevent camera shake.
Specially Designed for Reportage Photography
Constrained Spaces
When paired with modern professional cameras, a wide-angle lens captures the entire frame, regardless of tight spaces. Examples include indoor environments, ancient streets, or crowded areas.
Furthermore, a wide-angle lens has the ability to deceive the visual perception of secondary elements due to the lens's apparent deviation. Photojournalists can capture natural moments as if they are outside the frame.
Interactive Effects
The wide-angle effect makes viewers feel interactive with the characters in the photo, enhancing the image's message transmission. In portraits of people and objects, the distortion effect of the wide-angle lens is highly valuable. It provides a sense of interaction, highlighting the contrast between people and objects, creating emotional impact in the photo.
Composition
When the photographer's distance from the subject results in an excessively wide frame, there is often unnecessary space. This can lead to loose composition, with scenes lacking the necessary three-layer structure.
1.5. Canon's Range of Wide-Angle Lenses
Canon offers a diverse array of wide-angle lenses. Two standout models are:
Lens – EF-S10-18mm f/4.5-5.6 IS STM Zoom
Compact and lightweight, this EF-S zoom lens is an ideal travel companion, perfect for capturing breathtaking landscapes and impressive architecture. Enjoy engaging and nearly silent AF for more exciting video recording. With an impressive close-up capability of 0.22m.
The lens covers a focal length range of 10-18mm, easily adjustable through the rear focusing system. It consists of 14 lenses grouped into 11 clusters, offering a diagonal angle of view from 107°30′ to 74°20′. The closest focusing distance is 0.22m/0.72ft. With dimensions of ø 74.6 x 72mm and weighing 240g/8.5 oz, it has a 67mm filter size. This product is typically designed for APS-C camera models, equipped with additional IS support.
Lens L, EF 16-35mm f/2.8L II USM Zoom
Canon's renowned camera brand introduces the EF 16-35mm f/2.8L II USM, an ultra-wide-angle zoom lens delivering exceptional peripheral performance. The f/2.8 aperture is ideal for professional photographers working in low-light conditions. Precision-engineered with 3 high-precision aspherical lenses and a circular aperture, it produces a beautiful, natural background blur effect.
With a maximum aperture of 1:2.8, easy focal length adjustments through the rear focusing system, and a lens structure of 16 lenses grouped into 12 clusters, providing a diagonal angle of view from 108° 10’ to 63°. The closest focusing distance is 0.28m/0.9 ft.
This lens allows seamless focal length adjustment through both internal and full-time manual focusing systems. It offers a magnification of 0.22x. The filter size is 82mm, with a maximum diameter of ø 88.5, length of 111.6mm, and weight of 635g/1.4 lbs.
2. Zoom Lens
A zoom lens is a mechanical assembly of lens elements where the focal length (angle of view) can vary. As one of the popular Canon lens types, a zoom lens maintains focus as the focal length changes.
A lens that loses focus during zooming is called a varifocal lens. Virtually all consumer lenses with variable focal lengths use this versatile design. Using a zoom lens is a photography tip for capturing beautiful moments while traveling.
The focal length affects image quality, weight, size, aperture, autofocus performance, and cost. Every zoom lens sacrifices a bit of image resolution at its maximum aperture, especially at the extremes of its focal length range.
This effect manifests in the corners of the image, particularly when displayed in large formats or high resolutions. The larger the focal length range of a zoom lens, the more pronounced these compromises become.
2.1. Characteristics
Zoom lenses are often described by the ratio of their longest to shortest focal lengths. For example, a zoom lens with a focal length ranging from 100mm to 400mm might be described as having a 4:1 zoom or '4×'.
The terms super zoom or hyperzoom are used to describe camera lenses with very long focal lengths, typically greater than 5× and reaching up to 19× in SLR camera lenses and 83× in amateur digital cameras. This ratio can go as high as 300× in professional television cameras.
As of 2009, camera lenses exceeding about 3× zoom could not produce image quality equal to prime lenses. The aperture of continuous zoom (usually f/2.8 or f/2.0) is often restricted within this zoom range.
The decrease in quality is less noticeable when recording moving images at low resolutions. This is why professional video and TV lenses can have high zoom ratios. Digital photography can also accommodate algorithms compensating for optical errors, both in-camera processing and post-production software.
Some camera lenses are long-focus lenses, with longer focal lengths than typical lenses. Others are wide-angle lenses (wider than normal), and some lenses cover a range from wide-angle to long-focus.
Some digital cameras allow cropping and zooming into captured images. It simulates the effect of longer focal length zoom lenses (narrower field of view). It's digital zoom and produces an image with lower optical resolution compared to optical zoom.
Effects can be achieved using digital image processing software on a computer to crop digital images and expand the cropped area. Many digital cameras have both, combining them by using optical zoom first, followed by digital zoom.
Zoom lenses and super zooms are commonly used with still cameras, video, optical instruments, etc. Additionally, the afocal part of a zoom lens acts as an astronomical eyepiece for variable magnification to adjust the beam spread. It alters the size of a laser beam cluster for variable illumination.
2.2. Photography Conditions
Capture dynamic or static images. Take photos that require zooming without compromising quality. The key to having a beautiful picture in any condition is a good camera. There are two popular types of cameras today, Fujifilm and Canon. Which Mirrorless camera to choose between Fujifilm and Canon? With the advantage of high-quality lenses, it is still recommended to opt for Canon products.
2.3. Pros and Cons
Apochromatic (APO) lenses have added correction for chromatic aberration. Process lenses and apochromats often have small apertures and are used for extremely precise photographs of stationary objects. The performance is optimized for objects a few inches in front of the lens and lies beyond this narrow range.
Diverse types with lenses for aerial photography, infrared lenses, and ultraviolet lenses. There are fisheye lenses with an extremely wide angle, providing a view of up to 180 degrees with notable distortion.
There are tilt lenses that create pairs of images with a 3D effect when viewed with a suitable viewer. Soft-focus lenses for dreamy images without excessive focus. And they have the perfect removal effect common among fashion and portrait photographers.
Rotatable lenses when attached to the camera body to provide a unique perspective and camera angle. The variable control lens especially changes the scene by mimicking the camera's movements.
Process lenses are affected by geometric aberrations such as pincushion distortion, barrel distortion. It is usually used within a specific distance. However, this characteristic is also common in many similar models.
Zoom lenses are designed for use with a projector (specialized enlarger), not a camera. But they perform their functions very well.
2.4. Considerations When Using
Zoom lenses have a variable focal length as the internal elements move. This is often done by rotating the barrel or pressing a button to activate the electric motor. The lens can zoom from a moderately wide angle through normal telephoto to medium. Or it can go from normal telephoto to extreme.
The zoom range is limited by manufacturing constraints. The lens cannot have a large maximum aperture zooming from maximum wide-angle to extreme telephoto. Zoom lenses are widely used for small-format cameras. Mechanical zoom lenses can also include focus, aperture, and other functions.
Currently, many brands offer zoom lenses on the market such as lenses from Fujifilm, Sony, Canon, Tamron, Olympus, etc.
2.5. Canon Zoom Lens Series
Canon offers a diverse range of zoom lenses. Notable among them are the following Canon camera lenses:
Canon EF 11-24MM F/4L USM Lens
This is a Canon ultra-wide-angle lens with an EF mount, featuring an F4.0 aperture, 0.21x magnification, 7-blade aperture, closest focusing distance of 0.15m/0.49ft, filter size of ø43mm, compatible with EW-43 hood, and weighing 105g. Designed for Full Frame cameras.
Canon EF 24-70MM F/2.8L II USM Lens
The Canon EF 24-70MM F/2.8L II USM lens has an F2.8 aperture, 0.09 (wide-angle) / 0.21 (telephoto) magnification, 9-blade aperture, closest focusing distance of 0.38m/1.25ft, filter size of ø82mm, compatible with EW-88C hood. This lens weighs only 805g and is specifically designed for Full Frame cameras.
3. Fixed Lens
Photographers often use fixed lenses for portrait photography to achieve impeccable image quality. Its optical structure and lens coatings provide brighter and more vivid images.
3.1. Characteristics
A fixed lens (also known as a prime lens) has a fixed focal length. When using a fixed lens, you cannot zoom in or out on the desired image. In other words, fixed lenses lack zoom capabilities. The most 'standard' and popular focal length for fixed lenses is 50mm because it provides an angle of view closest to the human eye.
3.2. Photography Conditions
In addition to choosing a professional camera that captures still images well, it's advisable to use a camera tripod such as the Benro tripod. When capturing dynamic subjects, movement is required to change the focal length.
3.3. Pros and Cons
Regarding Aperture
The primary and arguably the most crucial advantage of fixed lenses is their large maximum aperture. A large aperture means the lens performs better in low-light conditions, allowing you to shoot at high shutter speeds.
Additionally, opening the aperture creates beautiful bokeh effects and excellent background blur. Fixed lenses always have a larger maximum aperture than zoom lenses in the same price range.
Regarding Image Quality
Designed without the need for zoom, the internal lens structure of fixed lenses is simple and operates more efficiently than zoom lenses. This leads manufacturers to focus on improving optical quality and reducing lens imperfections.
About Size and Design
Featuring a simple structure and eliminating moving lens components, fixed lenses are smaller and lighter than zoom lenses.
Regarding Cost
Most fixed lenses have a less complex construction, requiring fewer lens elements than zoom lenses. Consequently, their prices are significantly lower compared to zoom lenses with the same focal length and aperture.
No zoom capability and requires movement during use. With a fixed focal length, it cannot stay stationary for shooting. Photographers need to move to capture the desired angles.
Drawbacks
Not always can a walk-and-zoom replace the optical zoom of a lens. Photographers cannot always maintain a fixed distance from the subject. Therefore, they have to constantly change lenses if they want to alter the focal length.
Pricing
The cost of fixed lenses is always lower than zoom lenses, but to own a desired focal range, one needs to invest in about 2-3 fixed lenses. Thus, the overall cost becomes more expensive. For instance, it takes more than 6 million to buy a 50mm fixed lens. But adding an extra 500 thousand can get a zoom lens with a focal range from 18-55mm.
3.4. Things to Consider When Using
Fixed lenses with a fixed focal length can only be zoomed by foot. They are suitable for shooting portraits, objects, etc. Focal lengths are usually 20mm, 24mm, 28mm, 35mm, 50mm, 85mm, etc. When using fixed lenses, they can be combined with various types of image stabilization tripods to achieve the best image quality.
3.5. Canon's Lineup of Fix Lenses
Canon offers a diverse range of Fix lenses. Here are some representative types:
Canon EF14MM F/2.8L II USM Lens
With an aperture of F2.8, magnification of 0.15x, and 6 aperture blades, this lens is designed with a minimum focusing distance of 0.2/0.7m, weighing only 645g. It's a reliable companion for Full Frame cameras.
Canon EF 24MM F1.4 L II USM Lens
As a wide-angle lens without zoom, offering both manual and auto focus. It's crafted with a focal length of 24mm, maximum aperture of F1.4, minimum F22, and a closest focusing distance of 0.24m. Notably, it has excellent dust and water resistance, commonly used for Full Frame cameras.
Camera lenses are crucial components with numerous options to choose from. Canon, a renowned brand, ensures quality, so you don't have to worry about where to buy Canon lenses. Hopefully, this article has helped you choose the right Canon lens!
