The Canon RF 28mm f/2.8 IS STM is a prime lens designed for Canon's RF mount mirrorless cameras. Here are some key features and specifications of this lens:

Focal Length: The lens has a fixed focal length of 28mm, making it a wide-angle prime lens. On Canon's full-frame mirrorless cameras, it provides a wide field of view, suitable for various photography genres, including landscapes, street photography, and environmental portraits.
Maximum Aperture: The maximum aperture of f/2.8 allows for good low-light performance and the ability to achieve a shallow depth of field for creative effects.
Image Stabilization: It features built-in optical image stabilization (IS), which helps reduce camera shake and allows for better handheld shooting, especially in low-light conditions.
STM Autofocus: The "STM" in the lens name stands for "Stepping Motor," which is Canon's technology for smooth and quiet autofocus. This is particularly useful for video recording and capturing stills without noisy focusing.
Close Focusing Distance: The lens has a close focusing distance, allowing you to get up close to your subjects for more creative compositions.
Compact and Lightweight: It's a compact and lightweight lens, which makes it easy to carry around and suitable for travel and everyday use.
Filter Thread: The lens has a filter thread size of 43mm, which is the size for attaching various filters, such as UV, ND, or polarizing filters.
Lens Construction: It consists of 9 elements in 12 groups, including an aspherical element to reduce optical aberrations.
Compatibility: This lens is designed specifically for Canon's RF mount, which is used in their full-frame mirrorless cameras like the Canon EOS R, EOS RP, and others in the RF series.
Quality and Performance: While specific performance characteristics and image quality may vary, Canon's RF lenses are generally known for their high optical quality and performance.

This lens is a versatile option for photographers who want a wide-angle prime lens with a relatively wide aperture, image stabilization, and quiet autofocus capabilities. It can be used for a wide range of photography styles, from landscapes to portraits, and even some macro-style shots due to its close focusing distance.

RF 28mm F2.8 STM