butterfly
so when you focus a lens, the farther the lens of the image sensor gets closer to the focus. and the distance between the lens and the sensor is limited, however .. there are some limitations that we need to pay attention to. we can focus the lens to the subject of the photo.
when one day you want to take a macro photo but do not want to buy a special lens macro, and here are some cheap alternative scenarios that can be used:
1 Install the extension tube between the lens and the camera body
2 Install the close-up filter in front of the lens
3 Flip the lens
