F-stop is a consistent way to measure lens aperture, and helps photographers control exposure and depth of field. It is noted with an f followed by a slash and number, for example f/2.8.

The maximum aperture is noted in the lens – for instance, a Nikon AF-S 85mm f/1.8G sports a maximum aperture of f/1.8, while a Canon EF 16-35mm f/4L IS USM features a maximum aperture of f/4.

One notable feature of the Night Walker series is its maximum T-stop of 1.2. This fast aperture offers filmmakers the ability to isolate subjects across a variety of situations.

The aperture - also described as the f-number or f-stop - is the size of the lens opening through which light passes. Lenses that have a large maximum aperture such as f/1.8, ...

An aperture ring allows you to set the f-stop directly from the lens as opposed to a camera control dial. Example: Fujinon XF 8mm F3.5 R WR OIS is short for optical image stabilization.

After dozens of hours of research and testing more than 20 lenses, these are our picks for the first lenses you should buy for your RF-mount mirrorless camera.

An aperture ring allows you to set the f-stop directly from the lens as opposed to a camera control dial. Example: Fujinon XF 8mm F3.5 R WR OIS is short for optical image stabilization.