Sigma 52mm WR Protector Filter Auray LTS-ST or a stereo headphone output

or a stereo headphone output

Marking Ring

Using the A7 Accessory Support Adapter included in the kit

If you have the new compact pantograph

Sigma 52mm WR Protector Filter Auray LTS-ST or a stereo headphone outputGeneral Protective Filter Does Not Affect Color Reproduction Water, Oil, and Static Repellant The Sigma 52mm WR Protector Filter is a general use, clear protective filter to leave on a lens at all times. This filter helps to reduce dust, dirt, and moisture from reaching your front lens element and provides additional protection in case of drops or situations where scratching could occur. This Sigma WR Protector Filter is coated to repel water drops