Longteng or Nikon 28-300mm Quan Huafu lens is better.

Comparison of the advantages and disadvantages between the original lens and the sub-factory lens and the misunderstanding in selection

20 14-03-03 09:24:36 source: China photography.

When buying camera lenses, many film friends have such a misunderstanding that the original lens is better than the sub-lens. What brand of camera you buy must be matched with the same brand of lens. Buy a sub-factory lens and put it on the original camera, just like a monkey wearing a suit. But is this really the case?

The origin of the sentence that the vice factory lens is not as good as the original factory lens in the film era

In fact, the statement that the deputy factory lens is not as good as the original factory lens has been circulated in the film era. At that time, Longteng, Tuli, Sigma and other manufacturers started to manufacture lenses not long ago (Longteng and Tuli were established in 1950, Sigma was established in 196 1), which was only a junior compared with Leica and Zeiss (Canon and Nikon were also younger brothers at that time). Because it is a third-party manufacturer, many lens technologies, such as coating, focusing, zooming, lens workmanship, etc., are naturally different from the original factory, so there is a significant gap in imaging quality and handling performance after comprehensive comparison. Many users naturally think that these sub-factory lenses are not as good as the original ones. 2 1 century, although these sub-factory manufacturers have made great technical progress through years of technical accumulation, many products are out of focus, inaccurate exposure, color cast and other problems to varying degrees because they are not perfectly compatible with the original lens in terms of color contribution index, image quality control, focusing and aperture data transmission. Some sub-factory lenses still have problems such as paint loss after long-term use due to technological reasons, which also strengthens the concept that many filmmakers think that the original lens is good and the sub-factory lens is not good.

The rise of deputy factory lens in the digital age

With the continuous progress of technology, especially in recent years, Longteng, Tuli and Sigma have made breakthroughs in lens technology, and made impressive achievements in workmanship, focusing compatibility, photometric accuracy, color control and image quality control.

Among them, the ASP aspherical lens produced by Sigma is of excellent quality, which can effectively correct coma and deformation of the image and make the lens more compact and lightweight. Sigma APO achromatic lenses are divided into ultra-low dispersion lenses (SLD) and ultra-low dispersion lenses (ELD), which effectively solve the problem of obvious dispersion of most Sigma lenses. This can be seen from the imaging performance of Sigma's latest APO 70-200mm F2.8 EX DG OS HSM telephoto lens.

In addition, Sigma has added optical anti-shake system and HSM ultrasonic motor to many of its new lenses, which not only makes the lens more stable when shooting by hand, but also improves the focusing speed and accuracy. The DF dual-focus system also makes the impression that the focusing speed and accuracy of Sigma lens are not as good as the original factory disappear from the minds of users who have used its lens. In addition, by improving the external painting technology of lenses, Sigma's new lens users rarely complain that their lenses are painted.

In 20 12, Sigma also officially announced that all its interchangeable lenses would be summarized into three new product lines, each with its own clear production concept:

C (Fashion): Equipped with the latest technology, combined with light volume and excellent optical performance, it has achieved an efficient and fashionable model product line, covering a wide range of uses. Include standard zoom lens, telephoto zoom lens, high magnification zoom lens, etc.

A (Aestheticism): It is mainly designed with exquisite optical performance and rich expressive ability. This aestheticism product line can distribute high-end art exhibitions. Including: large aperture fixed-focus lens, wide-angle lens, ultra-wide-angle lens, macro lens, fisheye lens, etc.

S (Motion): With superior optical performance and rich expressive force, this motion model product line can reliably capture motion and help photographers accurately record and hunt the desired images. Include telephoto lens, telephoto zoom lens, super telephoto lens, super telephoto zoom lens, etc.

Coincidentally, Longteng and Tuli have also made great progress in lens anti-shake, focusing compatibility, lens coating, lens technology, focusing motor and overall lens workmanship, and with the evolution of their technology, these three manufacturers even introduced new lenses that were not produced by the original camera manufacturers. For example, Longteng's latest SP 150-600mm lens, Sigma's 18-35mm F 1.8 DC HSM wide-angle large aperture lens, Tuli's AT-X 1 16 PRODX II lens and so on. These lenses not only have excellent imaging quality and control performance, but also fill the focal length and function of the original lens.

At present, some sub-factory lenses have more performance and price advantages than the original lenses.

On the other hand, in order to save costs, many original lens groups use a lot of plastic parts and even lens holders. However, the coating process of optical lens, lens polishing and the use of focusing motor are obviously different from the original top lens, and the comprehensive image quality and practical application ability are actually not excellent. But relatively speaking, its price is not lower than that of some deputy factory lenses. Even if it is an advanced lens with relative grade and function, take a factory 17-55mm f/2.8 wide-angle optical anti-shake lens as an example. This lens only adopts the optical structure of three aspheric lenses and an optical anti-shake system. In contrast, the comprehensive performance of Longteng's 17-50mm f/2.8 VC lens, Tully's AT-X 16-28 f/2.8 PRO FX lens and Shima's 17-50mm F2.8 EX DC OS HSM lens are not necessarily worse than it. Even some lenses have dispersion control and central resolution at full aperture.

Among them, Tully's AT-X 16-28 F2.8 PRO FX lens adopts GMR sensor (high-precision magnetic sensor), thus obtaining very high focusing accuracy. In terms of optical structure, in addition to aspherical lenses, several SD glass lenses and multilayer coating technology are used, so it has the characteristics of rich overall color and rich dark details, which is more emotional than the original lens. On the other hand, Sigma 17-50mm F2.8 EX DC OS HSM lens is equipped with two FLD ultra-low dispersion lenses and three ASP aspherical lenses, all of which are coated with SML multilayer technology, which not only has rich colors, delicate and shiny overall contrast, excellent image quality with rich dark details, but also has very sharp image performance after reducing an aperture.

In addition, compared with the original lens, some sub-factory manufacturers have also produced many products that the original lens does not have. For example, Sigma's 18-35mm F 1.8 DC HSM wide-angle large aperture lens is a new product that all original lenses do not have. The constant large aperture design of F 1.8 makes this lens not only get the large angle of view that the general wide-angle lens has, but also increase the shutter speed of 1-2 in other dark light that can only be shot by the F2.8 aperture lens, thus easily completing the hand-held shooting task and shooting the special close-up effect of blurred background with large angle of view and small depth of field that the general wide-angle lens can't get.

Judging from the materials and a series of technologies used in this lens, Sima is also sincere. The lens adopts all-copper shell, matte shell and non-slip rubber with moderate hardness, which is satisfactory in both lens protection and grip comfort. The lens also uses internal focusing and internal zoom technology. Whether zooming or focusing, the lens barrel will not protrude to produce bellows effect, so the possibility of dust and mold entering the lens to produce internal dust or mildew is greatly reduced. Depending on the design of zoom and focus ring with moderate damping and no idle margin, this lens will give people a handy feeling whether it is zoom or focus control. At the same time, this lens also has the function of full-time manual focusing. After the photographer completes the autofocus operation, if he needs to change the focal length or change the composition effect according to the photography intention, he can directly turn the focus ring to focus, which greatly improves the freedom of shooting. You know, internal focus, internal zoom and full-time manual focus functions, these technologies are not even willing to use many original lenses with the same focal length, so-called mirror emperor.

Coincidentally, compared with many original 100 micron lenses, Longteng's new generation 90mm macro lens not only has a shorter focal length, but also has the same image quality and control experience as the original factory. If you pay attention to Longteng's SP 24-70mm F2.8 Di VC USD lens, you will find that this lens adopts a lot of high-quality lens technologies, such as circular aperture, LD low dispersion lens, XD high refractive index lens, aspheric lens, USD silent ultrasonic autofocus motor, VC optical anti-shake system, full-time manual focusing, waterproof structure and so on. And some of these technologies, some old factory lenses of the same type, have never been used. The use of these technologies makes Longteng's lens in a leading position in the standard zoom lens comparable to the original factory.

In addition, the biggest advantage of the deputy factory lens over the original lens should be the price of the lens. Even the relatively expensive Longteng SP 24-70mm F2.8 Di VC USD lens only costs about 7490 yuan, while most of the original lenses of the same level exceed 10,000 yuan. Such a huge price advantage, coupled with the increasingly excellent imaging quality and control feel, has also attracted people's attention to the new lenses of these third-party manufacturers.

To sum up, it can be found that with the continuous enhancement of the technical ability of third-party lens manufacturers, the previous concept that the original lens is better than the secondary lens needs to be changed. To measure the quality of a lens, we need to measure it from the shooting application purpose, camera compatibility, comprehensive cost performance, future upgrade space, various technologies adopted by the lens, lens workmanship and actual test results. At the same time, when buying lenses, remember to blindly trust the original brand and ignore the advantages brought by the new technology and new functions adopted by the lenses themselves.