The Sony Zeiss 55mm f/1.8 is a highly regarded prime lens designed for Sony's full-frame E-mount mirrorless cameras. Here's a breakdown of its key features and characteristics:  
Optical Excellence:
It boasts the renowned Zeiss Sonnar optical design, delivering exceptional sharpness, clarity, and contrast.  
The Zeiss T* anti-reflective coating minimizes flare and ghosting, resulting in rich, vibrant images.  
It produces beautiful bokeh (the out-of-focus background blur) thanks to its wide f/1.8 aperture and 9-blade circular aperture.  
Versatility:
The 55mm focal length is considered a versatile "standard" prime, suitable for a wide range of photographic applications, including portraits, street photography, and landscapes.  
The fast f/1.8 aperture allows for excellent low-light performance.
Build Quality:
It features a durable, weather-sealed construction, making it reliable in various shooting conditions.  
It is compact and light weight, which makes it great for travel.
Key Specifications:
Sony E-mount (FE - Full Frame)  
Aperture range: f/1.8 to f/22  
Filter diameter: 49mm  
Minimum focus distance: 0.5m (1.64ft)  
 
In essence, the Sony Zeiss 55mm f/1.8 is known for its outstanding image quality, practical focal length, and robust build, making it a popular choice among Sony full-frame shooters.