Description
We present near-IR (J and Ks) number counts and colors of galaxies detected in deep VLT-ISAAC images centered on the Chandra Deep Field (03h 32min 16s, -27{deg} 47' 25") and on the Hubble Deep Field-South. (22h 32min 55s, -60{deg} 33' 08"). The data have been obtained with the ISAAC infrared imager/spectrometer at the ESO VLT-UT1 telescope on several nights from September to December 1999 (seeing conditions around 0.7arcsec). The limiting surface brightness (1 sigma) obtained is 24.5mag/arcsec^2^ in J and 22mag/arcsec^2^ in Ks.
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