Visible crew/equipment: When the maid first opens the door to Mary Poppins, you can see a shadow of something, presumably the camera, on the maid's left shoulder until she steps right.
Visible crew/equipment: As Mary walks back to sit down the shadow of the camera is on her back.
Visible crew/equipment: As all the sweeps come out of the chimneys, the wires holding them are visible.
Visible crew/equipment: As Mary Poppins gets to the top of her exit from the chimney, the wires holding her are visible. And as Bert lands, his wires are visible.
Visible crew/equipment: As Mary Poppins walks over to put the hat stand in place, the shadow of the camera plays on her dress.
Answer: There's no reason you shouldn't be able to see it, it's so obvious, unless you have the movie on DVD. It's possible they fixed the framing of the scene for its DVD release.