I have a good sized collection of historically interesting lantern slides. They date from the 1800's - about 3 x4 inches in side -- and though they are on glass -- they are not all completely flat ( I think some may have been coated on whatever was available in the way of glass) . I would like to scan them so that they could be "cleaned up" (spots, fly specs, scatches ad stains) on the computer. I have no idea as to what to look for in a scanner of this type. Also -- budget is very important - I had to buy a gallon of gas this week for my lawn mower -and that almost broke the bank!