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Wednesday, October 13, 2004
from article - Introduction to Photography
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Posted by editor in chief at 01:30 0 comments
Labels: Articles, Photographs
from article - On Focus in Photography
How does CoC affect focus considerations?
There is only ONE plane of exact focus. Anything outside of this plane is rendered soft. The further away from focus plane, the softer the detail. Why so?
A point photographed at plane of focus will be represented as point on the film, to be exact light rays will re-converge, after passing through the lens, at the film plane, requirement for sharp rendering.
Now let’s look at a point that is away from the plane of focus.
If it is behind it, its image forming light rays will re-converge before the film plane, so will have to travel a bit more before they reach the film. This will result in a circle rather then a point. It’s size will depend on how much before the film plane rays convergence occurred.
If our point is before it, the rays will re-converge behind the film plane. So they will first travel through the film, before convergence takes place. This will also result in a circle rather then a point on the film. And again, the size of this circle will depend on the distance between film and the rays-convergence point behind it.
In either of the latter two cases, the rendering of the circle will result in a soft looking point as recorded on the film. It is the size of this circle we’re concerned about. Our calculations will use earlier assumptions, mostly based on critical lab measurements, as a starting point.
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see entire article
Posted by editor in chief at 01:20 0 comments
Labels: Articles
Monday, October 11, 2004
Word of caution
My latest post may be construed as misrepresentation of my intents. Due to recent upgrade to the site design, technical and link sections are off-line for the time being. Will post an update here once all of it is back on line. Thanks.
Posted by editor in chief at 07:58 0 comments
Sunday, October 10, 2004
Elusivefoto.com - what's there ?
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If you happened to stumble upon this blog prior to seeing my actual site, here is a short list of what you will find there:
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- my photographs, certainly, which may or may not represent my current way of seeing things through a camera lens
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- articles on all aspects of photography, technical, critique, practice etc.
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- equipment manuals in an on-line format (and eventually in a downloadable .pdf versions as well)
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- lens specifications, mostly large format stuff but other quality lines of all sizes as well
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- charts and tables of all sorts (i.e. DOF tables)
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- links to many quality relevant sites with shorter (or longer) descriptions of their content
This blog would be the place to post your comments on elusivefoto.com content and form of delivery. It's really the only way I can make it better. Thanks to all in advance....wjg
Posted by editor in chief at 19:57 0 comments