Many cameras (Canon, Nikon, Sony) use a 2.5mm or 3.5mm TRS connector for wired remote shutter control. Tip = autofocus trigger, Ring = shutter trigger, Sleeve = ground. Compatible with intervalometers and smartphone adapters.
| Pin | Name | Function | Type |
|---|---|---|---|
| T | Tip | Focus trigger (half-press shutter) | I/O |
| R | Ring | Shutter release (full-press) | I/O |
| S | Sleeve | Ground / common | GND |
Many cameras (Canon, Nikon, Sony) use a 2.5mm or 3.5mm TRS connector for wired remote shutter control. Tip = autofocus trigger, Ring = shutter trigger, Sleeve = ground. Compatible with intervalometers and smartphone adapters.