What’s the difference between the original lens and the non original lens?

The so-called non original lens refers to the lens produced by a third-party brand in addition to the fuselage brand. Generally speaking, all accessories and parts are the brand itself Or a designated manufacturer, whose factory standard is within its own control range, and the standard of good brand is naturally high. What is not original is that other manufacturers produce the accessories of products without the permission or approval of the original brand. It can be imagined that the standard quality of his products is very difficult to guarantee, and he has not communicated with the original brand manufacturer, so many technologies are needed Technical parameters rely on their own groping for design, then the shape of the product or the quality of accessories and certified manufacturers have a certain gap. The first and most important point is the difference in image quality, including color, resolution, and out of focus imaging quality. Under the premise of the same specifications, the original lens generally has more advantages in image quality, among which the most important is the powerful design and R & D ability behind the brand: < / P > < p > for example, I like to take photos with this sigma 50mm f1.4 DG HSM. I like the 50 mm angle of view, and I think its optical quality is worth my money. What doesn’t work is that I will buy one of the fuselages. The sharpness in the focus and the emptiness out of the focus are my favorite parts. I believe many people will not be used to it at the beginning. Sometimes, even if it’s raw, I feel like, ah, it doesn’t need to be adjusted any more. < / P > < p > I’ve heard others say that 50mm may be too insipid for many people. In the past, when I was in a group, voidshatter said again and again that 35mm was the best angle to shoot girls. Although I don’t totally agree with it, I can understand that the things you like are not the same. < / P > < p > of course, this situation will not always remain unchanged. In fact, the high-quality lens of the sub factory represented by simaart is quite good. However, the original lens still has a killer in hand, the most typical is the lens grinding accuracy and coating quality advantages, both of which have an important impact on the image quality: < / P > < p > the second is the difference in workmanship. The original manufacturers have high price and large profit margin, so they will not give up this huge market. In order to firmly retain users, the original factory head also maintains a high standard in workmanship, and the high-end lens has obvious advantages in terms of firmness, durability and failure rate control. < p > < p > Tenglong 28-75mm f / 2.8 Di III RXD is Tenglong’s first autofocus lens suitable for Sony’s full frame e-card, and its market positioning is also very clear. At present, many Sony users complain not that the fuselage or lens is not good enough, but that the price is too expensive. For users who want to obtain good image quality and pursue a certain cost performance ratio, it seems that there is not much choice, so this type of users focus on the third-party lens manufacturers. Tenglong 28-75mm f / 2.8 Di III RXD is targeting this type of user population. < / P > < p > some camera manufacturers have encryption protocols for the data transmission between the lens bayonet and the lens when they are making cameras. If they do not purchase patents, the compatibility of lenses will be poor, mainly reflected in the focusing speed and focusing accuracy, or some functions in the camera are only available to the original lens, and the lens parameters cannot be recorded in the photos This is also a normal means of commercial competition. The subsidiary factory can improve the compatibility by purchasing patents, cracking the agreement and upgrading firmware. Not only the lens, but also the accessories such as battery, flash, handle, etc. < / P > < p > most domestic brands have not yet realized the function of auto focusing in technology, so they can only focus manually. Of course, this is directly related to costs and patents. I don’t think it is very difficult to realize the technology. It just needs a little time. If you are interested, you should support domestic brands more. < / P > < p > to sum up, I think the difference between the original and the sub factory lens. Generally speaking, the price performance ratio of the subsidiary factory is getting higher and higher. For our ordinary users, when purchasing, they have more choices of low price and high quality. Why not? Huawei mate40 concept machine exposed, Kirin 1020 + curved surface full-scale screen, beauty hanging on iPhone 12