void auto_focus_now()
        {
            try
            {
                if (device.LiveViewEnabled)
                {
                    device.LiveViewEnabled = false;
                    liveViewTimer.Stop();
                    pictureBox1.Image        = null;
                    live_btn.BackgroundImage = Microfilm_Dafater_D810.Properties.Resources.play;

                    live_now_1.Visible = false;
                    live_now_2.Visible = false;

                    device.AutoFocus();

                    device.LiveViewEnabled = true;
                    liveViewTimer.Start();
                    live_btn.BackgroundImage = Microfilm_Dafater_D810.Properties.Resources.flag_red;


                    live_now_1.Visible = true;
                    live_now_2.Visible = true;
                }

                else
                {
                    device.AutoFocus();
                }
            }
            catch
            {
                MessageBox.Show("Cannot be able to auto-focus the photo");
            }
        }