Focusing the View Camera: A Scientific Way to Focus the View Camera and Estimate Depth of Field. by Harold M. Merklinger. Merklinger’s method is less widely used, but is much easier to apply in the field. . Harold Merklinger describes his method for optimizing depth of field here. Harold Merklinger on Depth of Field. If you arrived at this page by a direct link, it will be helpful for background information if you read my article, More on Depth.
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The stool in Fig.
The photo in Fig. To make things clear, I also prepared another version of those pictures Fig. When we focus our eyes at infinity, we will not be able to distinguish small details at large distances. Another writer in the last series of essaysDan Seligson, says that in his field, the Rayleigh limit has been surpassed by a factor of 5!
And there are a few other minor additions. In this case, the lens is merklijger at a distance that is slightly smaller than the hyperfocal distance. And poor resolution means poor sharpness. Where L is the camera height, F is the lens focal length and W is the format size in the down direction.
Merklinger’s Photo Books
He suggested a simple way out. Before discussing the results of the experiments, let us recall what the two theories predict for our conditions. For all other lenses, more care is required. This is an interesting concept that I know I have often used with analyzing it when I was worried the hyperfocal method would not render sufficient distance detail, often as a secondary safety shot. However if we make a sufficient enlargement, it will not be difficult to notice that the DOF area is asymmetrical.
Is the information at this web site still relevant? Scheimpflug’s Principle has been one of the guiding rules for view camera users ever since. merklinter
BAC Event Photos
Now that enough has been said about the two theories and the actual circles of confusion have been demonstrated, you are invited to compare two photographs. Recently, October 5I encountered a very similar phenomenon while printing with an ink jet printer. For an experimental panoramic view of Halifax and Dartmouth, Nova Scotia, try http: See here for details. Applying that approach to the general situation, we can obtain the universal mathematical expression: There is only one way to resolve this dispute.
Below are some examples showing portions of a building with corrugated siding illuminated by oblique direct sunlight. The rear area of acceptable sharpness extends to infinity. jerklinger
And the third plane is again perpendicular to the lens axis, but now one focal length in front of the lens. If we start with a lens with a relatively short focal length, our parameters will be beyond the limits of the green zone Fig. If the lens is focused at infinity, the two blue dash lines run in parallel Fig.
It was also interesting to see how much new details can appear in a picture, if the lens is focused at infinity. If we focus mer,linger lens at infinity instead of focusing it at the hyperfocal distance, objects at infinity will be shown considerably sharper in our picture.
Again, a few experiments can help us to understand the subject matter correctly. The traditional depth of field theory, developed over a hundred years ago, deals with the ability of the image to portray detail. It now includes a version of VuCamText. The procedure is very simple. The Photography Links page was revised – removing many non-functional links – on 15 Merklinget This case is similar to the previous one.
Hyperfocal distances and Merklinger’s method in landscape photography
ahrold Without enlargement, it can be clearly seen that circles of confusion do not increase for the distant sources of light. The problem stated The problem, in essence, is to find camera settings — lens selection, aperture, etc. Now let us see at the foreground Fig. The second plane is again one through the center of the lens, but this time parallel to the film.
With normal cameras the camera needs repair if the lens axis is not perfectly perpendicular with the film. Because of this, the divergence of blue dash lines in Fig.
Should I ever focus at the hyperfocal distance? The article is also published on this web site. Part 1 describes the principles of view camera focus, illustrating the application of the Hinge Rule to obtain the desired results.
According to the traditional theory, the degree of fuzziness grows quite sharply in front of the focusing point. Junk has a web page describing such application of Harkld methods. Moreover, it is quite natural, and it does not lead to unsharpness. A Ricohflex VII 35 mm camera.
Resolution for distant objects does decrease. In this article Merkliger assumed a basic familiarity with photographic concepts such as aperture, exposure, and focus.