'img stablilise on' is also not too far... wahaha i think they know what it is, they just looking for a shortcut to explain to the 2000 ppl they have to explain to everyday... hahah... and since normal consumer do not know what iso is, it's unlikely they will know the technical explanation for it... i guess it's like simplifying the explanation in a catchy/ creative way.. but yes a lot of salesmen in some shops are like just cashiers, don't know much about their products