Take you to see the internal structure of Canon 70-200mm F2.8L IS USM lens disassembly
Recently, LensRentals, a foreign photographic equipment rental website, disassembled the Canon RF 70-200mm F2.8 L IS USM lens. The price of this lens in China is about 18,000 yuan. LensRentals said that the internal structure of this lens is very compact and robust. They believe this is one of the most robust external zoom lenses on the market.
The lens belongs to the category of precision optical instruments, so the internal structure is very Complex, especially this kind of telephoto zoom lens. It needs to be bold and careful to disassemble it, fortunately, the operator did not “turn over” in this process. However, viewing the scene environment is not done in a dust-free space, and the operator does not wear special rubber insulated gloves. Therefore, even if the disassembled lens can be assembled back, it should have a greater impact on the imaging. Just watch it lively, don’t follow suit.
Start with the lens tripod ring
The filter ring part is easier to disassemble
Start to separate the front lens group
start from the lens mount
The whole process needs to be bold and careful. Observe and judge before you start dismantling the PCB board . There may be electronic equipment such as processing chips.
Disassemble the control ring of this lens. A major feature of the RF lens is the newly equipped control ring. The control ring function can be customized, and the functions such as aperture, shutter speed, ISO sensitivity and exposure compensation originally adjusted on the camera can be assigned to the control ring of the lens.
Inside the is the optical mark read when the control ring is rotated.
on the inner cylinder below the ring, you can see the progress Optical sensor for reading.
began to separate the lens outer tube and focus ring from the internal equipment.
You can see the precise and detailed wiring inside the outer tube.
separate the outer tubes further, and each outer tube There are sealing rings.
Lens zoom Agency feature.
We can see that there are insulating washers under the fixing screws.
The rubber outer ring of the zoom ring has been removed, and the zoom ring has been separated.
We can already see the linear motor inside.
The linear motor that is fixed multiple times gives people the first impression that it is very sturdy.
Although we feel that this lens is a complicated optical instrument from the above photos, the layout of this lens is actually optimized and simple enough . We can see the excellent electromechanical engineering and brand new structural design of this lens. From the internal structure, it is very strong and reliable, and the composite material has high strength. It is a reliable product that can be used for a long time.
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