def read_uic3tag(fh, byteorder, dtype, planecount, offsetsize):
    """Read MetaMorph STK UIC3Tag from file and return as dict."""
    assert dtype == '2I' and byteorder == '<'
    values = fh.read_array('<u4', 2 * planecount).reshape(planecount, 2)
    return {'Wavelengths': values[:, (0)] / values[:, (1)]}
