At low light levels or when not using a flash with your camera, a relatively long shutter speed may result in blurry images.
Film for SX70 cameras has a lower sensitivity than film for 600 camera's. In general film for SX70 cameras needs 4 times more light than film for 600 cameras. Indoor light levels generally are low. We would not recommend shooting SX70 from the hand without flash indoors.
Use a flash unit with your camera or rest the camera on a sturdy surface while shooting.
Please note that the built-in-flash will only be effective at a range from 1 to 2,5 meters (3,3 to 8,2 ft). Do not shoot objects below this distance when not using a special close up lens.