I took my own SLR (single-lens reflex camera) through an camera lens (focus lens), as well as an invisible mirror for a new practice and/or artistic simulation of the self-portrait. However, a digital camera towards the IR (infrared) photography in front of my eyes. It’s taking pictures with the light which is outside the spectrum that they are unable to see with our own eyes. Therefore, this light is too sensitive to our sense in the dark. it’s difficult to keep front of the IR photography through the SLR.