Sandy, the 3005 holds 5 8x10 sheets as wellas 5x7 and 4x5. the 3006 is designed for 4x5 and 5x7. someone mentione dthe problem with the antihalation backing not coming off. i have never had that proble but i can see where it can happen. chemicals can be poured in while standing upright. tilt it qa littel to let the chem in aand hte air out and you shouldn't have any problem.. tillman crane