This is a list of standard zoom lenses that are designed for mirrorless cameras â limit one per brand, focal length, aperture, and zoom mechanism combination. There is no precise definition of the term, but lenses marketed as "standard zoom" usually cover a range of at least 30mm to 60mm in terms of 35mm equivalent focal length with an optical zoom ratio of 2.5à(e.g. 28-70mm) to 5à(e.g. 24-120mm) â the most common being 3à(e.g. 24-70mm). They are called standard zoom lenses, because the midpoint of their zoom range is around 50mm, which is considered a standard or "normal" field of view.
High-quality optical formulas for wider-angle lenses are more difficult to achieve and expensive to produce, so older standard zoom lenses often started at 27mm or 28mm instead of 24mm at the wide end, especially for smaller sensor formats.
The Sigma 17-40mm F1.8 has the largest aperture of all APS-C zoom lenses but narrowly fails to qualify for this list due to its 2.35ÃÂ zoom ratio. It is included in the list of 2ÃÂ zoom lenses below.
This is a list of autofocus lenses designed for mirrorless cameras that at least cover 40mm (a "normal" field of view) in terms of 35mm equivalent focal length with an optical zoom ratio of 2ÃÂ to 2.4ÃÂ. In exchange for the smaller zoom ratio, they offer either a larger image circle, larger aperture, or smaller size.
The increasingly popular 20-50mm zoom range is arguably more versatile than the more established 16-35mm lenses and shares the minimum 2.5ÃÂ optical zoom ratio of 28-70mm lenses but shifted to a wider field of view. Even some new fixed-lens cameras like the Sony ZV-1 II are switching from a standard zoom lens to a wider zoom lens that covers this range.
The 35-150mm zoom range shares the 4ÃÂ optical zoom ratio of 24-105mm lenses but shifted to a tighter field of view, which can be more useful for portraits.