If the edge of the workpiece has a radius, it may not be visible clearly.
You can see clearly by adjusting magnification, lighting and background.
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We tried observing the edge of the battery. |
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1. Difference in depth of focus (versus 80x magnification) |
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| When opening the aperture | When the aperture is narrowed |
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| As the aperture widens, the depth of focus becomes shallow and edges may not be clear. | |
2. Difference in background color (compared to 80x magnification) |
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| In case the background color is black | In case the background color is white |
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| Edges may become unclear due to background reflections, reflections from lights or shadows. | |
3. Difference in magnification |
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| The depth of focus also changes with magnification. (Compare with open aperture) | |
| At 30x | At 80x |
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| Edges of the same object may appear blurred when magnification is increased. | |
