Thanks, Ecke ... that will be helpful down the road, no doubt.
I guess what I'm looking for is a combination of both. Nothing overly
scientific -- like down to the atomic level, or anything.
Maybe if I can explain the way I've grasped the concept of the effect of
aperture size on depth of field: I see it as analogous to pouring sand
through a funnel. If you use a funnel with a larger spout, the sand is
going to pile up on the surface underneath it. Whereas, if you use a
funnel with a narrow spout, the sand will spread out on the surface
beneath it. That's how I view light passing through a larger or smaller
aperture as it relates to the focus -- which, as far as I know, is
completely false.
If I could find something that gives a technical explanation, perhaps
formulas, and then an analogy to help it all sink in, it would help me a
great deal. I mostly don't want to sound like an complete idiot when I
go about explaining what I'm doing. :-)
Thanks again,
Walt
On 12/2/2010 6:24 PM, eckinator wrote:
Roman posted this link a while ago and I find it quite useful for
doing the math. Is it that or are you interested in the underlying
logic?
http://roman.blakout.net/?dof
HTH Ecke
2010/12/3 Walter Gilbert<ldott...@gmail.com>:
Hi all,
Being not particularly mathematically inclined (to put it very charitably),
I was wondering if any of you could point me toward a sort of online idiot's
guide to understanding and calculating exposure values, depth of field, and
other basics along those lines. I figure having at least a loose grasp on
details of that nature might be helpful as I dip a toe into the world of
analog.
I've posted an entry on my photo blog concerning some of the basics that I'm
already familiar with, and plan to chart my progress as I go along.
Granted, what I've written is geared toward people who know even less about
photography than I do (as hard to conceive as that may be), but it can be
found here:
http://waltgilbert.posterous.com/putting-myself-through-the-old-school
It's a first baby step on a long journey, but I'd like to document it as I
go along, and share it with anyone who might be interested. So,
essentially, I do understand the stuff they probably teach you in the first
week of Introduction to Photography 101 -- but largely on an intuitive,
practical level. Are there any resources on the web where a simpleton can
go to familiarize himself with those principles on a more technical level?
Thanks in advance for any help you can provide.
-- Walt
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