What does "E PZ 16-50mm F3.5-5.6 OSS" mean?

E is Sony's e-mount, micro-single special lens,

PZ is an electric zoom, which can be manually or automatically zoomed like digital. (zoom)

OSS is lens anti-shake

16-50 is the focal length of the lens, covering the focal length between 16 mm and 50 mm, and its zoom magnification is 50÷ 16≈3. 1 times.

3.5-5.6 is the maximum aperture value, which means that there is a floating (varying) aperture between the focal segments of 16-50mm, and the maximum aperture is F3.5 at 16mm and F5.6 at 50mm.

The history of human development proves that no technology can be brilliant forever. In the film age, film, a medium for storing images, must be strictly protected from light leakage when taking pictures. However, in the digital age, the situation has changed fundamentally-CCD is not afraid of light leakage. It can be used not only for framing, but also for imaging after clearing. Therefore, the necessity of reflector is greatly reduced. Its working principle determines that reflector framing is not suitable for digital photography. There is no need to keep the mechanical part-reflector on the digital camera that can be completely electronic. Although people can tolerate the bulky and complicated structure of the reflector, because they can both watch through the lens and protect the film from light leakage, in today's digital age, because the image sensor is not afraid of light leakage, the existence of the reflector is no longer necessary. With the improvement of electronic viewing technology, the clarity and brightness of electronic viewing will be good enough to replace the reflector sooner or later. Therefore, in theory, a single electric camera can have almost all the advantages of SLR cameras-better image quality, greater depth of field and replaceable lenses. Once waiting for the demand to break out, such a problem will definitely be solved, and the size of a single electric camera is an advantage that SLR can never catch up with.

Before Sony introduced the "micro-camera", consumer electronics giants such as Olympus, Panasonic and Samsung had introduced products without mirrors and using electronic viewfinder, which could change the lens like a SLR and called it a "single-camera". Hidehiko Handai, head of Sony's personal audio-visual department, said that "Micro-single" is a trademark specially used in the China market, and its products have been given two meanings: micro-camera, compact and portable, which can change lenses like SLR cameras and have the same image quality as SLR cameras.