Quote Originally Posted by Prof_Pixel View Post
The Kodak Professional Photoguide says: Lens-to-film Distance = (Magnification + 1) X Focal Length and Effective Aperture = f-number X (Magnification + 1)
hmmm... okay that sounds more fruitful... maybe I should look it up - I think i even have one of those somewhere! only question - what do you mean by 'and' as in FL and eff. aperture?

I'm pretty sure you can cancel out the aperture somehow - i.e. - it really shouldn't come into play (?) except where exposure compensation is needed I think?