VideoCAD

Example 26  Checking Depth of Field in horizontal projection

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Example 26  Checking Depth of Field in horizontal projection

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Example 26  Checking Depth of Field in horizontal projection

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Read before: Depth of Field.

 

Problem

 

We need to check that a camera has enough Depth of Field.

 

Order of work

 

1. Activate the camera.

2. Open the Depth of Field  box by clicking on the Depth of Field button on the Toolbar.

3. In the Depth of Field box: Specify Aperture (f-number) of the active camera. Click the Default button.

 

4. Check the sharpness area bounds in the horizontal projection.

 

When the depth of field box is visible, next to all cameras in the horizontal projection the following lines are displayed:

These lines are calculated according to the depth of field parameters of each camera at the height of depth of field measurement.

 

If the focus plane or the plane at the hyperfocal distance not intersect the horizontal plane at the height of depth of field measurement within the view area projection, then the focus plane or the plane at the hyperfocal distance are not displayed.

 

If the near or the far bound of the sharpness area not intersect the horizontal plane at the height of depth of field measurement within the view area projection, then this bound is not displayed.

 

The absence of near and far bounds of the sharpness area indicates that the sharpness area completely covers projection of view area, thus the depth of field does not reduce the resolution of the camera.

 

5. If the displayed sharpness area is not enough:

Click the Specify the focus plane button in the Depth of field calculation box.
Try to change focus distance by clicking on the view area projection until you get the desired sharpness area.

 

If you can get the desired sharpness area, then the desired depth of field is achievable for the active camera.