Pentax and Nikon are professional optical enterprises, specializing in optical instruments and equipment, from camera lenses and electron microscopes to nano-mask aligner. Canon makes many things, from office supplies to small electronics to digital products. As the saying goes, "different learning methods have different specialties." How can we make first-class products if we can't concentrate?
-Pentax has a unique SMC lens coating, and Nikon has a unique lens nano-cone coating, both of which are highly transparent coatings with reflectivity less than 2%; Canon bought some Pentax patents, and the reflectivity of SWC coating is only 6%-7%, which means the light transmittance is only about 93%. Obviously worse.
-Canon lens, many people pursue Canon's red circle lens, which is really good, because only Canon has developed a fluorite lens to reduce dispersion, that is, L lens, which is professionally called "LaK lanthanum crown" lens; Especially from the early 1970s to the late 1980s, this LaK low dispersion lens made Canon lens very popular. The manufacturing cost of natural fluorite lens (lanthanum crown lens) is very high, which is the main reason why L lens is expensive.
-In the 1990s, Nikon took the lead in developing synthetic fluorite lenses (that is, ed lenses and ultra-low dispersion lenses), which have extremely high optical performance, low cost and are not limited by the lens aperture; At this point, the aura of Canon L lens has been dimmed a lot. Although Canon has also developed a low-cost synthetic UD low-dispersion lens, due to Nikon's patent restrictions, Canon's UD lens can never surpass Nikon's ed lens in optical performance.
In the test of foreign professional optical test websites, the 50mm lens and 85mm lens of two major brands are taken as the test objects. The color resolution of Nikon lens is 9.5 points (resolution) and the edge resolution of object image is 9.2 points (sharpness). Canon scored 8.5 points and 7.8 points respectively. Not exactly. I read it with instant translation software. )
In recent years, Nikon has continuously developed new optical technologies, such as nano-coating, ed ultra-low dispersion film and HRI high refractive lens. , which enriches the optical performance of its civil lens. Canon, on the other hand, didn't see any new optical products that made people shine. In addition, Nikon lens works well, and the optical quality of low-end lens is passable. Therefore, considering all kinds of factors, Nikon undoubtedly beat Canon in terms of lens.