Quote Originally Posted by Rajagra View Post
I just want to check something ... you guys do realise that his image size is one centimetre NOT one millimetre don't you?

He mislabelled it in at least one place:
right. as labeled: 1/2 mm scale. I may have read over a typo, but I thought it said. 1cm was enlarged to to fit 25cm screen which equaled an approximate 25X magnification.