Dolly Zoom Mouse Gesture
Dolly zoom the scene camera with mouse gestures.
Changes the focal length of the scene camera while keeping the size of the subject constant.
This is useful when you want to adjust the perspective when experimenting with camera angles.
How to Use
Press Alt + M and move the mouse left or right to adjust the scene camera's perspective.
The focus target is the active object by default.
Press C while running to change the focus object to the "active object" or "3D cursor."
Features

- Menu Location: 3D View > View > Navigation
- KeyMap: Alt + M
- Shift Key: Fine adjustments.
- Number Keys: Numerical setting of focal length.
- C Key: Switch focus between the active object and the 3D cursor.
Other

This feature is for adjusting camera movement.
It does not support keyframes for animation.