I am completely satisfied with the resolution provided by my IIIc, which has a six element lens. If I get a Ia or Ib will I notice a difference in resolution due to the four element lens? I develop at home and scan for use on my 24 inch diagonal computer screen in my office. I might print an 8x10 but nothing larger. Most of my pictures are outdoors on sunny days using black and white film with apertures from f8-f16. Thanks!