Is the camera's lens longer and more expensive?
In fact the manufacturers for the use of convenience, do everything possible to make long short.
So the short thick lens will be more expensive.
Amateur telescope long, but you can weigh the weight to know, where there are few pieces of the lens, the general is also very fine.
A 200mm f / 2 lens is not long, but the thick bowl of the diameter, making it worth more than thirty thousand yuan.
Are talking about the vernacular, hope you can understand.
The longer the lens, the more lenses, the more heavy, the more expensive materials, the more expensive.
Of course, the longer the lens is thicker, its optical design and mechanical design more difficult,
High design costs, high manufacturing process requirements, low cost.
Less demand, low yield, will push the price of the big lens.
The lens is easy to do.
Almost can think so. But not comprehensive, nor is it absolute.
Only from the appearance point of view, some short lens may be longer than its long lens.
If you look from the appearance of the lens of your cheap, but also from the size of the lens point of view.
The larger the lens, the thicker the tube diameter, the more expensive!
From the raw material point of view, the lens of its cost of material ah.
The main cost of the lens is those glass lenses.
The thicker the lens, the larger the lens,
