What does Fuji no dog head mean?

It refers to everyone’s evaluation of Fuji camera lenses:

The imaging quality of zoom lenses is actually the result of mutual compromise, because the wide-angle end must be taken into consideration when designing. , imaging at the mid-focus range and telephoto end. Because I think too much and have to strike a balance, what I get is not good. Fixed-focus lenses do not need to consider zoom issues when designing, so they can obtain the best image quality at a certain focal length. Due to cost considerations, dog heads basically do not have a constant large aperture.

Expansion:

Fuji Camera Development History Fujifilm Co., Ltd. (hereinafter referred to as: Fujifilm) has been moving forward with a firm pace since its establishment in 1934, and its development has become a world-class One of the largest manufacturers and suppliers of comprehensive imaging, information, and document processing products and services in the world. The current global president and CEO is Shigetaka Komori, headquartered in Tokyo, Japan. Fujifilm began to actively develop overseas in the late 1960s and built a strong global production, sales and service network. The Fuji Group includes Fujifilm Co., Ltd., 282 subsidiaries and 40 affiliated companies engaged in research and development, manufacturing, software development, marketing and procurement and related business activities. It is distributed in more than 200 countries and regions around the world, and its overseas sales are close to consolidation. 50 of total reported net sales. Fujifilm has three major business areas, namely 1. Imaging business area including traditional and digital product groups (film, cameras, photo paper, chemicals, processing and expansion equipment, etc.); 2. Including printing systems, medical systems, liquid crystal materials, The information business field of recording media and other series of products; 3. The document business field consisting of document processing equipment (copiers, printers, multi-function digital printing centers, consumables, etc.) produced and sold by Fuji Xerox Company, a subsidiary of Fujifilm.