I am sure your father was a real good photographer and what I am about to say is not meant to belittle him in any way whatsoever. But... I was a pro photographer for many years and I have known personally and worked with many professional media photographers in London, Tokyo and Europe. I have to say that I have never known one of them to only take no more than two photographes of any subject 'ever'. Even in 'Still life' and advertising. Film stock varies so much that only the wise photographer would take polaroids and still bracket his/her exposures to make sure they got the right one. The top picture you have shown of your father is obviously depicting 'Child' photography. Whether this is advertising his trade or not I do not know...But, taking successful photographes of children almost always takes a lot more that two frames especially in a studio situation. I would be extremely interested to know who your father was and see some of his work. I have been a 'wannabe' many times in my life. If I had never have been, I would not ever have been a professional musician, a professional photographer or a professional digital artist! Colm Jackson