The well-known Japanese optical brand Pentax, originated from the Asahi Optics company established in 1919, launched the first 35mm single-lens reflex camera made in Japan in 1952, and with the invention of the M42 screw SLR camera in the 70s, it became the world's largest SLR manufacturer at that time. It should be noted that due to the acquisition, Pentax's main imaging business was transferred to Ricoh Group, and the medical optics part belonged to HOYA Co., Ltd.
 
Pentax began to enter the telescope market in the 50s of the last century, and from the 70s to start the brand's popularity, astronomical telescopes, equatorial mounts, and astroscope series have received good market response, and once became a star product. However, due to its high-priced strategy and conservative publicity, Pentax discontinued astronomical telescopes in 2008. However, thanks to its excellent mirror-making technology, the Pentax sports optics line is still active today, including binoculars.
 
The Z series is the flagship model of Pentax binoculars, priced at about 6,000 yuan, equipped with special low dispersion ED glass, with excellent color correction function and a high degree of restoration of the details of things. At the same time, the series also uses a hybrid aspheric lens and a transmittance coating to maintain sufficient sharpness of the image. In terms of durability, it adopts an oil-resistant, hydrophobic coating, and a cold-resistant magnesium alloy body, which can play a good role in protection. In addition, the high eye distance of 15mm or more makes it easy for the eyes to feel dry even if you observe it for a long time, and it is also easy to use for people who wear glasses, and the field of view is wide and there is no obvious vignetting.
 
The S series is a collection of roof ridge and Paul prism models, focusing on fashionable appearance and portable bridge design, priced at 1210 to 2510 yuan, compared with the Z series, the cost performance is higher. The series has been replaced with a lightweight, sturdy aluminum body, a full multi-layer coating on all lens and prism surfaces to suppress flash or ghosting, and a high-refractive index glass prism BAK4 for a bright visual appearance from the center to the edges. Compared with domestic products in the same price range, the optical design of the S series is superior.
 
The A series has the smallest and lightest models in the whole product line, AD 8×25 WP and AD 10×25 WP, priced at 1410 to 1520 yuan, which basically retains the optical quality of the S series at the same time, the lens barrel is integrated into the design of foldable storage, which is very suitable for outdoor travel or watching concerts. U series has more 100 yuan entry models, of which PapilioII. series has a wide audience, known as the "insect mirror", it is characterized by the nearest focusing distance of about 50cm, this macro is used in museum calligraphy and painting, cultural relics viewing, the performance is appropriate, the details of the target object are in full view, and there is no need to take off the glasses to use, the look is comfortable.
 
Pentax has only nearly ten models of binoculars on the shelves of domestic e-commerce platforms, and the richness is not as good as the official website. More series model information needs to be obtained by users logging in to the official website, and those who need to purchase need to consult the agent information through the official website. At present, Pentax has regional agents in Beijing, Shanghai, Wuhan, Jinan, Hangzhou and other places.
 
It should be noted that Pentax binoculars have their own set of naming conventions, taking ZD 8×43 WP ED ZOOM AS AN EXAMPLE, THE FIRST LETTER OF Z REPRESENTS THE NAME OF THE SERIES, THE SECOND LETTER REPRESENTS THE TYPE OF PRISM SYSTEM, D IS THE ROOF TYPE, P IS THE PAUL TYPE, 8×43 IS THE MAGNIFICATION AND OBJECTIVE APERTURE OF THE TELESCOPE, WP REFLECTS THE WATERPROOF STRUCTURE, ED MARK USES ULTRA-LOW DISPERSION ED LENSES, AND ZOOM MEANS VARIABLE MAGNIFICATION.