en cherchant sur le net :

Canon EOS 1000D: all SD and SDHC cards*
Canon EOS 300D: max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 350D: max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 400D: all CF cards*
Canon EOS 450D: all SD and SDHC cards*
Canon EOS D30: max 2 GB CF
Canon EOS D60: max 2 GB CF
Canon EOS 10D: max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 20D: max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 30D: all CF cards*
Canon EOS 40D: all CF cards*
Canon EOS 50D: all CF cards*
Canon EOS 5D (firmware older than 1.1.1): max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 5D (firmware 1.1.1 and later): all CF cards*
Canon EOS 5D Mark II: all CF cards*
Canon EOS 1D: max 2 GB CF (4 GB if preformatted as FAT16 with 64K clusters)
Canon EOS 1D Mark II (firmware older than 1.2.6): max 2 GB SD, max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 1D Mark II (firmware 1.2.6 and later): max 2 GB SD, all SDHC cards*, all CF cards*
Canon EOS 1D Mark II N (firmware older than 1.1.2): max 2 GB SD, max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 1D Mark II N (firmware 1.1.2 and later): max 2 GB SD, all SDHC cards*, all CF cards*
Canon EOS 1D Mark III: max 2 GB SD, all SDHC cards*, all CF cards*
Canon EOS 1Ds: max 2 GB CF (max 8 GB if preformatted as FAT32)
Canon EOS 1Ds Mark II (firmware older than 1.1.6): max 2 GB SD, max 8 GB CF (larger than 8 GB if preformatted)
Canon EOS 1Ds Mark II (firmware 1.1.6 and later): max 2 GB SD, all SDHC cards*, all CF cards*
Canon EOS 1Ds Mark III: max 2 GB SD, all SDHC cards*, all CF cards*

  • Including cards over 8 GB in size.



Cela pourrait etre simplement une intolérance du 20D vs la CF .... si ta carte de 8Gb marche c'est amplement suffisant pour la taille des raws du 20D