A close-up can make a molecular structure easier to inspect—but camera moves can also make a scene feel as if its point of view has shifted. That matters when you are preparing an animation, comparing views, or using visual effects such as fog or depth of field that depend on the camera’s target point.
In SAMSON, Zoom camera is useful when you want to change the camera’s distance while keeping its target fixed. The animation changes the camera’s position between its start and end frames; it does not change the target point. In practical terms, you can move closer to a region of a molecular system without also animating the point the camera is looking toward.
Why a fixed target can help
Think of the target point as the anchor of the view. If your goal is simply to make a region appear larger, changing the camera position while leaving that anchor in place can make the move easier to control. It is especially relevant if you are using Fog or Depth-of-field: keeping the target unchanged avoids altering the target point as part of the zoom animation.
This is different from Dolly camera, which can use different target points at the beginning and end of the animation. Choose Zoom camera when the target should stay put; consider a dolly when the intended move involves changing the target point too. If the goal is to change the view’s orientation or otherwise reposition the camera, the related Move camera animation may be more appropriate.
Set up the move around the view you need
- Choose the start frame. In the Animator’s Track view, select where the zoom should begin.
- Compose the starting view. Orient the view and camera as you want them at the beginning of the animation. This starting composition is the basis for the move.
- Add Zoom camera. In the Animator’s Animation panel, double-click the Zoom camera effect.
- Set the end frame. Place the end of the animation where the zoom should finish. You can move either the start or end frame afterward if the timing needs adjustment.
Before settling on the timing, check the transition in the context of the surrounding animation. A camera move that reaches the right close-up can still feel abrupt if its duration does not fit the sequence. SAMSON lets you adjust the animation’s Easing curve, which controls how camera parameters are interpolated between frames. Use it to shape the transition rather than changing the target point when the target is meant to remain fixed.
Check which camera and orientation rules apply
By default, camera animations apply to the active camera. The animation’s target point is defined by that camera’s current target position—the center of the view. If you need the animation to apply differently, inspect it and adjust Apply to active camera.
One setting to review is Keep camera upwards. Camera positions may be defined differently depending on whether the grid is on or off; this option determines whether the animation’s behavior depends on the grid state. If the move does not behave as expected, inspect this setting and check the grid state as part of troubleshooting.
You can also fine-tune camera target and position with the animation controllers. This is useful when the initial or final framing needs adjustment without rebuilding the whole animation. The key distinction remains: Zoom camera is designed to move the camera while leaving its target point unchanged.
For the full procedure and property details, see the Zoom camera documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.