Now that there are more and more mirrorless users, some camera and lens problems have also been exposed, and we have written many similar articles before. It is normal to have some minor problems, but some representative products have some obvious problems that need everyone's attention.
For example, some time ago, a Nikon Z24-70/2.8S was found to have a problem during the maintenance process, and I don't know if anyone has encountered a similar problem.
According to the user, the problem with this lens is that it cannot be focused, and the aperture cannot be adjusted. I put the lens on the test machine. The aperture value is displayed, and the lens self-test action is not completed. The camera body does not recognize this lens data. Of course, you can't adjust the aperture value.
The 24-70, which is one of the large ternary lenses, is unambiguous in terms of the quality performance and workmanship of the lens, and in the lenses of the Nikon SLR mount, there are few problems with the large ternary lens. Today, I got this Z-mount 24-70/2.8S with a data screen, which looks a little awkward. I had rarely touched this lens before, and it stands to reason that the chances of a problem with this lens are very small. Let's tear it down and see what the problem is.
Removing the inner tube group, you can see that the internal structure of this lens is very refreshing, and the layout is very rigorous, giving people a strong and reliable feeling. I can't see the problem at the moment, and continue to disassemble.
Remove the aperture assembly to check the aperture group, turn the blades sensitively, and there is no jamming. Dismantling needs to continue.
When the focusing unit was removed, the focus unit still used a dual-focus lens group, and it was found that the upper focusing lens group bracket had been broken.
On the left is the broken lens group, and on the right is the new component. After a closer look, the plastic bracket of Nikon's focusing lens group is so thin. The design of this component is a bit difficult to understand, as a very important component, how can it be so crudely designed? For repairs, this is the space left for us.
This time to replace this focusing unit, the parts are difficult to order, and it is estimated that it will cost a lot of money to have similar problems with this lens in the future. Generally, the replacement is to replace the iron barrel on the outside together, so the cost is high.
The component replacement can be done for a few hundred yuan, but if it is replaced with the iron bucket outside, the cost will be high, requiring more than 2,000. So hopefully this is just an example, and there shouldn't be such a problem for this lens.
Install the camera, and finally clean the lens.
Finally, the test machine will return to normal, and the data screen will be displayed normally.
This problem is the first time we have encountered it, from the perspective of the internal structure, this should be the place where this lens is prone to problems, I wonder if users who have used this lens have encountered similar problems?
Aperture has something to say
This lens shouldn't have such a problem
This problem with Nikon's lens is something I personally think should not be there. For a bull head, this should be a bug in the internal design.
There are two possibilities for the lens group to break this time, the first possibility is that the lens has suffered a relatively large impact or vibration, such as the lens in the bag, when the camera bag is subjected to a large impact, it will cause internal injuries, and the vulnerable areas will be destroyed. However, the lens has a good appearance, and the user has not mentioned any impacts, so this is only a small possibility.
The second possibility is a defect in the product design, the camera will move back and forth each time it is focused, and due to the defect in the design, the material is not up to standard, and it will break after a long time of movement, which is more likely.
If it is a defect in the internal design, this is a more troublesome problem, the parts are rare, and the repair is a large expense. And for this lens, the problem is unacceptable, and hopefully this is just one case.