Preheat oven to 350 degrees. In bowl combine peaches and juice of lemon. Toss to coat. With zester or fine grater, grate lemon rind to yield 1 teaspoon of zest and add to peaches. Sprinkle 1/2 cup brown sugar over peaches. Pour into buttered deep dish pie plate. In separate bowl combine with a fork butter, flour, remaining brown sugar and cinnamon. Blend with fork into course pieces. Sprinkle over fruit. Bake for 30 minutes. Serve warm.