I just read this threat and I just got a 135mm macro for my 67 II and am very disappointed with the fact that it has a bad ratio to it. At work (dentistry) I use a Canon 10D with a 100mm macro with a ring light and I can get down to 3 teeth in photographing without any other help. Why couldn't they do this with the 67. Can you shoot small flower with the extension tubes. I understand that the larger the film size the harder it is to get 1:1 since 1:1 on 35mm is much smaller a area than a 1:1 on 4x5.