When R is attached to the edge of a workpiece, it may not be seen clearly.
You can see clearly by devising magnification, lighting, background.
|I tried to observe the edge of dry cell|
1. Difference in depth of focus (compare at 80 times)
|Open the aperture||Close the aperture|
|If you open the aperture, the depth of focus will become shallow and the edge may become blurred.|
|2.Difference in background color (compare at 80 times)|
|When the background color is black||When the background color is white|
|The edge may be blurred due to reflection of the background, reflection of the edge part due to lighting, shadows.|
|3. Difference in magnification|
|The depth of focus also varies depending on the magnification. (open the aperture and compare)|
|at 30 times||at 80 times|
|Even with the same object, the edge may become unclear if the magnification increases.|