AboutMartin Seymour Expertise I have worked in most aspects of still photography, using film and the wet process for 50 years. Employing all film formats 35mm to 8x10 sizes, I went over partly to digital cameras in 02, also PC editing of pictures.
I still find film work more demanding , as you have to get it right at the start with no auto settings on the camera to cover my mistakes.
Pictorial work is my personal interest.
Its is not a good idea for me to suggest a particular make of equipment just a type, and its uses.
Experience
Past/Present clients Ricardo eng. watercraft, IBM
100,000 members of the public.
Expert: Martin Seymour Date: 10/18/2005 Subject: aperture function
Question I am looking for a diagram that explains how the aperture physically controls depth of field. I completely understand the aperture scale, but why does it happen? Why does a smaller aperture give more DOF than a larger hole? What happens to the image as it passes through different sizes of holes to produce more DOF? I have scoured the internet looking for a simple diagram explaining the physics of this.
Thanks,
Answer Question is shown below
I am looking for a diagram that explains how the aperture physically
Controls depth of field. I completely understand the aperture scale, but
Why does it happen? Why does a smaller aperture give more DOF than a
Larger hole? What happens to the image as it passes through different
sizes of holes to produce more DOF? I have scoured the internet looking
for a simple diagram explaining the physics of this.
Thanks,
Hi ?
Yes you will have difficulty finding a suitable drawing for this on the web I suggest that you try you local library for a book and diagram on photography.
I agree that its important to get this sorted in your own mind as it’s the basis of all pictures that you take, when you understand this point you will say to yourself what took me so long, as its very simple!
But does need a diagram as you say.
But basically it’s all to do with the path of the light that always travels in straight lines!
IF you still cannot find a suitable book get back to me and I will try and send you one.
Martin.
