Canon EF-S 10-22mm f/3.5-4.5 USM Lens

This appears to be the key features of the Canon EF-S 10-22mm f/3.5-4.5 USM lens. Here’s a breakdown of what each feature means:

* EF-S-Mount: This lens is designed for use with Canon’s APS-C format cameras that have an EF-S mount.
* 16-35.2mm (35mm Equivalent): This means the lens is a wide-angle zoom lens that has a focal length equivalent to 16-35.2mm on a full-frame camera.
* Aperture Range: f/3.5 to f/27: The aperture range of the lens, which determines how much light enters the lens and controls the depth of field. f/3.5 is a relatively wide aperture, while f/27 is a relatively narrow aperture.
* One Super-Ultra-Low Dispersion Element: This element helps to reduce chromatic aberration, which is a common issue in wide-angle lenses.
* Three Aspherical Elements: These elements help to reduce distortion, coma, and other forms of aberration.
* Super Spectra Coating: This is a type of coating that helps to reduce ghosting and flare caused by light reflecting off the lens elements.
* Ring-Type Ultrasonic Motor AF System: This is a fast and quiet autofocus motor that uses ultrasonic waves to move the lens elements.
* Internal Focus Design: The lens design allows for internal focusing, which means that the length of the lens does not change when focusing.
* Rounded 6-Blade Diaphragm: The diaphragm is rounded, which helps to create a more pleasing bokeh (out-of-focus area) in images. The 6-blade design helps to create a more circular bokeh than a traditional 5-blade design.

Categories: Canon Lens, Lenses

Description
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Description

The EF-S 10-22mm f/3.5-4.5 USM is a wide-angle zoom lens designed for Canon EF-S-mount APS-C format DSLR cameras. It offers a versatile focal length range of 16-35.2mm, equivalent to a full-frame camera, making it suitable for a variety of shooting conditions.

Optically, the lens features one Super-Ultra-Low Dispersion (Super-UD) element and three aspherical elements to control chromatic and spherical aberrations, ensuring high image quality with minimal distortion and color fringing. The Super Spectra coating applied to individual elements helps to reduce ghosting and flare, resulting in improved contrast and color neutrality, even in strong lighting conditions.

The lens uses a ring-type Ultrasonic Motor (USM) for fast, quiet, and precise autofocus performance, with full-time manual focus override. The internal focusing design allows for quick focusing speeds while maintaining the overall lens length during operation.

Additionally, the lens features a rounded six-blade diaphragm, which produces a pleasing out-of-focus quality that is ideal for using shallow depth of field and selective focus techniques.

Overall, the EF-S 10-22mm f/3.5-4.5 USM is a versatile and high-quality wide-angle zoom lens that is well-suited for a variety of applications, including landscape, architecture, and interior photography.