User Manual
The Sigma CR-41 Cable Release Switch is designed to provide remote shutter control for the Sigma fp Digital Camera, minimizing camera shake and enabling precise long exposure and timed photography. This manual provides instructions for proper setup, operation, and maintenance of your CR-41.

Figure 1: The Sigma CR-41 Cable Release Switch, showing the main trigger unit, the cable, and the 2.5mm jack connector.
The CR-41 consists of a main trigger unit with a shutter button and a lock mechanism, connected by a cable to a 2.5mm jack that plugs into the camera.
Note: Ensure your camera is powered off before connecting or disconnecting the cable release to prevent potential damage.
Tip: Using the cable release helps prevent camera shake, which is critical for sharp images, especially during long exposures or when using telephoto lenses.
| Problem | Possible Cause | Solution |
|---|---|---|
| Cable release does not trigger shutter. | Cable not fully connected. Camera not powered on. Camera settings incorrect (e.g., not in photo mode). Faulty cable release. | Ensure the 2.5mm jack is fully inserted into the camera's remote terminal. Turn on the camera. Check camera mode and settings. Test with another compatible cable release if possible, or contact support. |
| Shutter remains open indefinitely (not closing). | Lock switch engaged. Camera in Bulb mode without manual release. | Disengage the "LOCK" switch on the CR-41. Ensure you manually release the shutter button or unlock the switch to end Bulb mode exposure. |
Please refer to the warranty documentation provided with your original purchase or visit the official Sigma website for detailed warranty terms and conditions applicable to the CR-41 Cable Release Switch.
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact Sigma customer support through their official website or the retailer from whom you purchased the product.
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