Can Canon 5D3 take infrared photography?

No, because there is a layer of infrared low-pass coating on the coms to block infrared interference. If you need infrared photography, you need to install an adapter ring and filter holder in front of the lens, and then plug in the infrared filter. . It is worth mentioning that the infrared filter has poor light transmission, so the shutter speed is basically very slow under the scorching sun, and a tripod is usually required for shooting.