thanks - I'm thinking that the small ones at Michaels are not very sharp and would not enlarge enough for me if it's the small box style.... I've had bad experiences with low end small models...I really want a good one like the ones in schools or art studios - but there is such a range in price and lens' that I'm not sure how good it needs to be to create a large image and a reasonably sharp one. I do know a teacher - she's not an art teacher - but she may be able to tell me the specs on the ones they use that are clear and reproduce largely on the wall. I'll have to ask her....I just thought some other art quilters may use them and have specific models they are happy with.