  The short wavelength cutoff has been introduced in the calculation of ac
fluctuation conductivity of superconductors. It is shown that a finite cutoff
leads to a breakdown of the scaling property in frequency and temperature.
Also, it increases the phase phi of the complex conductivity
(tan(phi)=sigma_2/sigma_1) beyond pi/4 at T_c. Detailed expressions containing
all essential parameters are derived for 3D isotropic and anisotropic
fluctuation conductivity. In the 2D case we obtain individual expressions for
the fluctuation conductivity for each term in the sum over discrete wavevectors
perpendicular to the film plane.
