Custom Variable 1

Using Half-Press Duration for Autofocus ( C Var 1) 

 C Var 1 controls the length of the half-press (HP) signal that is sent to the camera before the full-press (FP) trigger. By extending this half-press duration, the sensor gives the camera time to perform autofocus functions before the image is taken. 

 With newer mirrorless cameras offering highly advanced autofocus systems — including animal-eye detection — this feature allows autofocus to be used in camera-trap setups for the first time. 

 When the half-press signal is active, the camera can detect and focus on the subject before the shutter is triggered, enabling the possibility of shooting with a shallow depth of field and precise eye focus, creating images that differ greatly from traditional manual-focus camera-trap photos. 

 Practical Considerations 

 

 Focus reliability: Autofocus-based setups are inherently less reliable than manual focus. Some images may be misfocused if the camera fails to detect the correct point of interest or locks onto background elements. 

 Lighting: Autofocus requires continuous light to function. For nighttime use, video lights  may be necessary, as flashes alone will not provide light until after focus is attempted. 

 Timing: The optimal half-press duration depends on the camera model and lens. Mirrorless cameras typically require between 0.2 s and 1 s for accurate subject detection and focus acquisition. 

 

 This setting introduces a new creative approach to camera trapping — enabling  autofocus precision and shallow-depth-of-field imagery previously impractical with PIR triggers. While manual focus remains the most dependable method for critical work, C Var 1 offers an exciting opportunity to experiment with modern autofocus systems for more dynamic and cinematic results.