If cameras are not already displayed
in the drawing, click Render tab Camera
panel Show
Cameras.
Click the camera glyph.
Click a Lens Length/FOV grip tool.
Move the cursor and click where you want
to position the lens.
Press Enter.
NoteTo change a lens
length to a precise value, double-click a camera glyph to open the
Properties palette. In the Cameras section, Lens Length option (mm),
enter a numeric value.