that makes total sense. thank you. i just read up on Voigtländer Heliar lenses and i am liking those. they are f4.5 and are sharp lenses. i will be in the look out for those too. my interest right now is 8x10 but i am thinking of making the jump up to 16x20 view cameras. so lenses number 6, 7 and 8 would be good too.