Can you do infrared photography with a digital camera?

Yes — digital infrared photography is possible, but most standard digital cameras are not very efficient at it because they include an infrared-blocking filter over the sensor.

Your main options are:

1. Use an unmodified camera with a near-IR filter. This can work, but exposures are often very long, framing through the viewfinder may be difficult, and manual focus is often needed. Post-processing is usually required.

2. Use a camera designed for infrared or have a camera converted by removing/replacing the internal IR-blocking filter. This is the most practical way to get stronger IR results and avoid extremely long exposures.

3. Some Sigma DSLRs have been noted as unusually suitable for IR work by removing the dust protector, allowing either extended-spectrum capture or use with IR filters.

So the short answer is: yes, but on most digital cameras it’s cumbersome unless the camera is specially designed, converted, or particularly IR-friendly.