Introduction
This manual provides instructions for the proper use and care of your Sigma TS-111 Tripod Mount Ring. Please read this manual thoroughly before use to ensure optimal performance and longevity of the product.
Safety Information
Always ensure the tripod mount ring is securely attached to your lens and tripod before use. Avoid applying excessive force during installation or removal. Keep out of reach of children.
Package Contents
- One (1) Sigma TS-111 Tripod Mount Ring
- Instruction Manual
Product Overview
The Sigma TS-111 is a ring-shaped tripod mount designed for specific Sigma lenses, crafted from a lightweight and durable magnesium alloy. It provides stable support for your lens when mounted on a tripod or monopod.
Key features include:
- Compatibility with both standard and Arca Swiss clamps.
- Integrated 1/4-inch screw holes for connection to various tripod sockets.
- Allows a lens hood to be reversed and stored with the mount attached.
- Equipped with safety stop screws to prevent accidental detachment from Arca Swiss clamps.

Figure 1: Front view of the Sigma TS-111 Tripod Mount Ring, showcasing its ring shape and base.
Setup
1. Attaching to the Lens
Open the tripod mount ring by loosening the knob. Carefully place the ring around the compatible lens barrel, ensuring proper alignment. Close the ring and tighten the knob securely until the mount is firm on the lens. Do not overtighten.

Figure 2: Side view of the tripod mount ring, highlighting the tightening knob used to secure it to the lens.
2. Mounting to a Tripod
The base of the TS-111 features an integrated Arca Swiss compatible plate. Slide this plate into an Arca Swiss clamp on your tripod head and secure it. Alternatively, for tripods without Arca Swiss clamps, use the 1/4-inch screw holes on the base to attach the mount directly to a standard tripod screw. Ensure all connections are tight before use.
3. Safety Stop Screws
The mount includes safety stop screws on the Arca Swiss plate. These can be engaged to prevent the mount from sliding out of an Arca Swiss clamp accidentally.

Figure 3: Bottom view of the mount, illustrating the Arca Swiss compatible plate and the 1/4-inch screw holes for tripod attachment.
Operating Instructions
Once securely mounted, the TS-111 allows for easy rotation of the lens within the ring, enabling quick switching between horizontal and vertical orientations without adjusting the tripod head. Loosen the knob slightly to rotate the lens, then retighten to lock it in position.
Maintenance
Clean the tripod mount ring with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, followed by immediate drying. Avoid using harsh chemicals or abrasive materials. Store in a dry, cool place away from direct sunlight.
Troubleshooting
- Mount does not fit lens: Ensure you have the correct TS-111 model for your specific Sigma lens. Refer to your lens manual for compatibility.
- Mount feels loose on lens: Check that the tightening knob is fully secured. If still loose, ensure the ring is correctly seated around the lens barrel.
- Mount slides in Arca Swiss clamp: Verify that the Arca Swiss clamp on your tripod head is fully tightened. Ensure the safety stop screws on the TS-111 are engaged if desired.
Specifications
| Product Dimensions | 5.4 x 3.7 x 3.3 inches |
| Item Weight | 4.2 ounces (0.26 Pounds) |
| Item Model Number | ATC900 |
| Manufacturer | SIGMA |
| Color | Black |
| Compatible Devices | Camera |
| UPC | 085126938437 |
Warranty and Support
For warranty information or technical support, please contact Sigma customer service directly or visit the official Sigma website. Keep your purchase receipt as proof of purchase.





