The Rise of Second-Generation Lenses and How to Choose Wisely | Knowledge #523

Considerable time has passed since camera manufacturers began introducing their mirrorless mounts. Following the development of the first Micro Four Thirds mirrorless camera in 2008, Sony launched the E-mount in 2010, followed by Fujifilm’s X-mount in 2012.

[FACT CHECK REQUIRED] 2018年にはキヤノンとニコンもミラーレスカメラ市場に参入し、一眼カメラ＝ミラーレスのイメージが浸透してから久しいです。
As these mounts have matured, a generational shift has begun to transform not only camera bodies but lenses as well. One of the clearest manifestations of this transition is the emergence of so-called “second-generation lenses.”

A lens’s core specifications are generally defined by three elements: its mount, focal length, and maximum aperture.
When a manufacturer releases a newly developed lens with the same essential specifications as an earlier model, it is commonly described as a “second-generation lens.”

Within the X-mount system, for example, some lenses explicitly identify themselves as second-generation models, such as the XF 16-55mm F2.8 R LM WR II. Others, such as the XF 33mm F1.4 R LM WR, function as substantive successors even though their product names do not include a “II” designation.

Many second-generation lenses arrive with refinements that make them more compelling photographic tools. This reflects not only advances in optical engineering, but also the continual evolution of lens materials, autofocus motors, and other supporting components.

In the past, optical configurations were often tested through a process heavily dependent on the intuition and experience of skilled engineers. Today, computers can evaluate vast numbers of simulation patterns and identify an appropriate arrangement of lens elements in far less time.
This has enabled the wider adoption of aspherical elements, which were once difficult to manufacture and implement, helping to suppress spherical aberration while reducing overall weight.

With performance enhanced by technological progress, second-generation lenses represent an attractive option for many photographers. 

Common improvements include more compact and lightweight construction, greater resolving power, enhanced close-focusing capabilities, and improved dust- and weather-resistant sealing. For creators who already own a first-generation model, the prospect of upgrading may be highly compelling—budget permitting.

In practice, however, second-generation lenses are almost invariably more expensive than their predecessors. It is also worth noting that the arrival of a new model often reduces the resale value of the first-generation lens.

Depending on the capabilities of your camera and your photographic approach, purchasing a first-generation lens at a lower price on the used market may be the more considered choice. The key is to assess the specifications carefully against your own creative and practical needs.