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.
|Published (Last):||27 August 2008|
|PDF File Size:||15.94 Mb|
|ePub File Size:||1.31 Mb|
|Price:||Free* [*Free Regsitration Required]|
The graphs in the table serve exlusively to demonstrate the general arrangement of curves and lines. Due to this fact, resolution diminishes as the distance from the camera increases. As this was a test print anyway, and the top of the print contained nothing but blue sky, I re-submitted the same sheet of paper for the next print of the same image.
The Ophthalmology folks have even created a ” Scheimpflug Club “.
Merklinger’s Photo Books
Of course, we cannot draw any conclusions on the basis of such a small picture. Or, at least, resolution of details must be the same. Three cameras were added to the Unusual Cameras page on 20 September Then the parameters will be within the green zone, and DOF will stop reacting to changes in focal length.
The downloadable version is actually expanded; the former addendum and the Shutterbug article on perspective and distortion have been included within the main text. If merklinfer least one of the above conditions is not observed, it is worth focusing the lens at haropd hyperfocal distance.
If you want to learn more details, please read the original book. In this case, we had to increase the distance between the toucan and the plate in proportion to the focal length. This observation did not square with his observations either. Both rules must be obeyed.
BAC Event Photos
These two rules also allow us to determine the conventional depth of field even when lens and film are tilted. With this aperture, and the lens focused at infinity, then features merlinger or so or larger will be distinguishable. But it is absolutely natural.
See the download page for details. Harold Merklinger was very unhappy with the traditional recommendation to focus the lens at the hyperfocal distance to obtain the largest DOF. Harold Merklinger offered another approach to linearization.
Technical Books on Photography by Harold M. Merklinger
The Scheimpflug Principle is also used extensively in Ophthalmology – the diagnosis of medical problems related to the eye. Is the information at this web site still relevant? It was also interesting to see how much new details can appear in a picture, if the lens is focused at infinity.
In this case, the lens is focused at a distance that is slightly smaller than the hyperfocal distance. If all our objects are located behind this point, the focus should be set at infinity. The article is published on this web site. Without the express permission of the author, the material may not be used in or included with printed or formatted-for-computer records offered for sale.
Hyperfocal distances and Merklinger’s method in landscape photography
All opinions stated are the authors own. When preparing the illustrations, I scanned the negatives dpi, which gives 3 pixels per the diameter of the circle of confusion. Depending upon the answer the photographer either increases or decreases the amount of lens tilt. However if we make a sufficient enlargement, it will not be difficult to notice that the DOF area is asymmetrical.
See this page for details. Merklinger’s method for scenes with distant objects. I intend to re-write the book from end to end, updating it with new information – such as issues related to digital imaging. So far as this article is concerned, his method for dealing with scenes that extend to infinity or, at least, for miles can be expressed very simply: Merklinger wrote that in spite of many differences, both methods can be used in practice. The experimental photographs will follow.
The size of the toucan should vary, of course. The DOF area is determined by the acceptable divergence two green arrows of the blue dash lines that represent a cone in the object field.
A comment has been added to the View Camera Focus page concerning corrections to the ‘back-to-front’ focusing method. These images were all taken within minutes of one-another, but the lens focal length was changed slightly from shot to shot.
The closest point will then be defined by the lens focal length and format size and orientation. The nearest point of acceptable focus according to the conventional depth-of-field formula is shown for comparison. Note this email gets spammed a lot so if you want to get your message through please prefix “Holding Tank” in the title. His disk-of-confusion in the object field unlimitedly grows behind the object in focus see the diverging blue dash lines in Fig.