Stokes I and Stokes V images after sky-model subtraction for the baseline ranges 30–800λ (top panels) and 50–250λ (bottom panels). Sub-bands with frequencies between 121 and 134 MHz went into these images. Note the reduction in the displayed field of view from 20 × 20° to 10 × 10°. Intensity units are in mJy/PSF, and the scale range is set by plus and minus three times the standard deviation over the full field in all images. Note the noise-like structure in the two Stokes V images (i.e., a lack of any features). The Stokes I images, on the other hand, clearly show the LOFAR-HBA primary beam attenuation effects on the remaining diffuse emission. The level of this emission is limited by the classical confusion noise within the primary beam. The 3° × 3° box delineates the area where we measure the power spectra.