The experimental results of testing the transfer function of Canon EOS 500D, AxioCam HS, and ToupCam 14MP cameras using the method proposed in this paper are presented. A diode-pumped solid-state laser (with a wavelength of 477 nm), an He-Ne laser (632.8 nm), and a tungsten-halogen lamp were used as light sources. The radiation power was varied by a spectral nine-stage attenuator (no. 7880171) and colored glasses (GOST 9411-91). It is shown that specialized cameras provide a shooting mode with a linear transfer function, while the transfer function for commercial cameras is linearized by its gamma correction.
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