Kneel for the photographer: the camera lens has a very fine running-in trace, about 5 mm long. Does it affect imaging? Does it have a big impact?

Slight scratches on the lens will not affect the imaging, nor will it produce traces on the photo, and nothing can be seen in the photo. At this point, you should relax.

So what does it affect?

Because there are scratches, some diffuse light will be generated, which will reduce the "hardness" of the lens, which means that the photo will be "soft". The more scratches, the softer the photo will appear, and the more scratches will also affect the clarity.

Of course, you can't see any change if you just scratch it in the photo. The problem is that you are afraid of accumulation, so you must pay attention next time. It is not allowed to wipe the lens with an eye patch.

You go and buy a suede and a lens brush. If there is ash, use it to brush and brush as little as possible. In addition, these two tools should be kept clean.

Tell me another thing that will reassure you:

As we know, cameras can be equipped with extra mirrors. There is also a mirror called "Starlight Mirror", which is made of optical glass and engraved with netted lines. The density of the grid is equivalent to 2-3mm, so you can shoot the work, not to mention that you only have one line.