P. Persi 1, D. Cesarsky 2, D. Rouan 3, & R. Siebenmorgen 4
1 Istituto Astrofisica Spaziale CNR,Area di ricerca di TorVergata,Roma,Italy
2 Institute d'Astrophisique Spatial, Orsay,France
3 Observatoire de Paris,Meudon, France
4 ISO Science Operation Center,ESOC,Villafranca,Spain
We present the results of spectral images taken with ISOCAM in CVF mode from 5 to 16.5 of the planetary nebule NGC 6302 and the ``ring nebulae'' NGC 6720. The different morphologies observed in the atomic fine-structure lines are discussed for the two nebule.