Why is the SLR lens so expensive?
And then the mechanical structure, SLR lens mechanical structure of the precision requirements are relatively high, first of all to withstand enough zoom movement, and then in this movement to ensure that the optical axis is basically no offset. For the automatic zoom head and electronic structure and combined.
Therefore, not the price of unrealistically high, there is a certain value in the inside.
In addition, in fact, most of the well-known lens manufacturers are not their own production, but after the design of the lens were separately processed, the domestic production of lens manufacturers quite a few, but the status quo to the interests of the supremacy, rather than research, R & D strength and level is still limited.
For the lens of the optical system, the first to be designed, the cost of the design according to the requirements of the lens, good optical design to tens of thousands are possible. We see some of the lens imaging will be some purple edge, or image distortion, etc., these are caused by optical design, for these effects it can only take into account some of these aspects, the whole should have a good imaging, with aspheric Right now. And then the lens of the material, the lens of the different prices of different materials, some in order to correct the aberration must use a series of glass, and this glass price is more expensive.
Anything is not based on the cost of his material to count, there are many to count into the material costs, labor costs, machine wear and so on. And in terms of optical lens, not as you said the cost is not high, you can say, optical calculation of optical lens, 10 sets of lenses and 1000 sets of lenses fixed cost is the same, each lens needs a face The whole set of tooling, and even if you only produce a lens, there are two sides, each side need to tooling, and 1000 words also need such a tooling, so the more the cost will be lower. And then with the lens diameter, the greater the diameter of his surface more difficult to control the accuracy of the higher precision machining requirements, the greater the difficulty of processing, it will increase the cost, some must be a little bit of artificial surface dressing. Then spherical and aspheric, spherical processing is simple, aspheric processing is much more difficult. And then the coating, do not underestimate the coating, a film design and processing are good products on the impact of the optical system is huge, and the coating of materials tend to be relatively high prices. These are only for a single optical lens, and did not form a lens into the optical system.
Said the white lens is a few optical lens group, said white IPONE, computer, etc. These are some electronic devices, the cost is not high, why the cottage phone to sell hundreds, genuine to thousands. Said that the CPU is the point of silicon, many other chips are silicon, why CPU so expensive, the other chip a few dollars there.
