The pedagogical model of the digital camera can be put on a Ø-10 mm rod or on a camera’s stand.

• Pentax lenses: One with a fixed 50-mm focus, the other with a 28 to 70-mm focus
• Focus, aperture, time exposure, field depth, magnification, sensor, sensibility and accuracy
• Image reflection with mirror to understand the Reflex aiming

By setting the lens, the students can understand the field depth and the digital aperture principle.