Yesterday night I observed lambda Cygni, which is a triple star. The components A and B are quite close (0.9") and are near the limit of my 4 inch refractor. Splitting them got even harder because there is a magnitude difference of 1.6 mag between the stars. At least, they are rather bright (4m7 and 6m3). I saw that it is a double only by a slight bulge of the airy disc. The component C could be seen easily, of course.
The sketch is mirror reversed.