並前往https://books.google.com.tw/books?id=m1fPFVJIi6gC&pg=PA130&lpg=PA130&dq=DSLR+PTT&source=bl&ots=rHfJt72ypO&sig=ACfU3U2oALiNPbjg5oqb6DtGmCpFjnKHGA&hl=zh-TW&sa=X&ved=2ahUKEwj3ibimzJ6AAxV3mlYBHQtXAOoQ6AF6BQiBARAD