Sigma 17–40mm F1.8 DC Art Lens - L-Mount

The filter size is 67mm.

This lens is compatible with Canon RF Mount, Fujifilm X Mount, L mount, and Sony E-mount.

Yes, it has autofocus with HLA (High-response Linear Actuator).

The maximum aperture is F1.8.

Yes, the lens features a silent autofocus motor and internal zoom, making it suitable for video.

No, this lens does not have image stabilization.

The closest focusing distance is 0.28 meters.

Use a soft, microfiber cloth to gently clean the lens. Avoid using harsh chemicals.

Ensure the autofocus switch on the lens or camera is enabled. Clean the lens contacts and check for any obstructions.

Check your focus settings, ensure that you are focusing on the subject. Also check if the subject is in the depth of field. Clean the lens and check for any smudges.

Check your camera's settings to ensure the aperture control is set to 'lens'. Ensure that the camera is compatible with the manual aperture control.