Lens position control device and endoscope apparatus

An endoscope apparatus comprising:

• an endoscope that is provided with a zooming optical system;
• and
• a lens position control device that controls a position of a variable magnification lens of the zooming optical system,
• wherein the lens position control device includes
• a DC motor with a brush that generates a drive force for changing the position of the variable magnification lens,
• a drive circuit that drives the DC motor with a brush by repeating an application state where a drive voltage is applied between a pair of terminals of the DC motor with a brush and a release state where the terminals are released from each other, and
• a processor configured to control the position of the variable magnification lens based on a time-integrated value of a counter-electromotive force generated at the DC motor with a brush in the release state.