the camera that olympus manufactures that weighs less than 530.0 uses which compress format?
(AND digicams.camera_compressed_format (JOIN digicams.camera_compressed_format.cameras (AND (lt digicams.digital_camera.weight 530.0^^http://www.w3.org/2001/XMLSchema#float) (JOIN digicams.digital_camera.manufacturer m.0fqsd))))