Yes, but not with normal front screw-in filters. The Sigma 8-16mm’s very convex front element and extremely wide field of view make standard filter mounting difficult.

Options mentioned by users include:

• Large square filter systems such as the Cokin X-Pro.
• Adapting a Lee SW-150 holder, which is designed for other ultra-wide lenses.
• Hand-holding square filters, or using a custom/jury-rigged holder that mounts around the lens or camera rather than using normal filter threads.

One reported workaround is fitting an adapter ring over the lens barrel with protective tape so a large holder can be attached. This can work, but coverage at the widest end is still a challenge.

Limits to expect:

• At 8mm, many filter systems may vignette because even 4-inch filters can be too small for the angle of view.
• Around the long end, some users report 72mm filters can be used with the cap tube fitted, though with slight vignetting wide open.
• A polarizer is generally a poor choice on such an ultra-wide lens because the sky can darken unevenly and look unnatural.

So: yes, filters are possible, but usually only with oversized square systems or custom adapters, and performance at 8mm is limited.