Relatively narrow-band continuum (134.5–137.5 MHz) LOFAR-HBA image of 10° × 10° of the North Celestial Pole (NCP) field, centered at dec +90.°0. Baselines between 30 and 800λ were included, using uniform weighting. No sources have been subtracted, and the image is cleaned to a level sufficient to show the brightest few hundred sources above 60 mJy. The 3° × 3° box delineates the area where we measure the power spectra. The bright extended source in the lower-left is 3C61.1 (J0222+8619), discussed in the text. The bright (7.2 Jy) compact source near the NCP is indicated by an arrow. The intensity units are mJy/PSF (see text). R.A. increases clockwise; R.A. = 00 hr is toward the bottom.