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.

Author: Arashizragore Dokasa
Country: Oman
Language: English (Spanish)
Genre: History
Published (Last): 14 October 2014
Pages: 51
PDF File Size: 8.53 Mb
ePub File Size: 6.39 Mb
ISBN: 865-9-70348-487-6
Downloads: 69590
Price: Free* [*Free Regsitration Required]
Uploader: Mogore

But contours of large objects will be sharp and clear. Our ability to resolve all the details does not save that picture. The use of hyerfocal distance has the benefit of long usage, and is well-understood.

Technical Books on Photography by Harold M. Merklinger

According to the traditional approach, only in this case the size of the DOF area does not depend on the focal length provided the image magnification is maintained constant.

To have objects sharp over a wide distance range is often desirable in landscape photography, because subjects close to the camera give a sense merklonger depth and scale to the image, which might be lacking if the whole scene is distant. You can see this guy in the photograph that I took in the kerklinger of my flash unit Fig. You may ask another interesting question. With normal cameras the camera needs repair if the lens axis is not perfectly perpendicular with the film.

Harolf this case, the lens is focused at a distance that is slightly smaller than the hyperfocal distance.


If we start with a lens with a relatively short focal length, our parameters will be beyond the limits of the green zone Fig. The exact formulas to calculate DOF can merkliger found in [ 1 ]. But they often do not understand that in some cases objects became fuzzy very quickly beyond the area of sharpness, while in other cases objects out of focus look only slightly diffused.

Most view camera photographers focus the camera through hard work and merkinger.

BAC Event Photos

Return to the Photo Books Table of Contents. With digital photography growing in popularity, sites like The Digital Camera Resource Page are most welcome.

Since there are no double lines in Fig. The Scheimpflug Principle is also used extensively in Ophthalmology – the diagnosis of medical problems related to the eye.

Again, a few experiments can help us to understand the subject matter correctly. The traditional approach treats the situation as follows. The advantages of focusing at infinity did not prove to be obvious. One of these is “aliasing” – which can occur when the optical image contains more detail than the image sensor can resolve.

The problem stated The problem, in essence, is to find camera settings — lens selection, aperture, etc. The red curve corresponds to the case when a lens in focused at the hyperfocal distance hwhile the blue curve represents the lens focused at infinity. So how does this work out in practice. The description of its results is not traditional, but the results themselves are well-known. I aborted a print job shortly after it started. Note this email gets spammed a lot so if you want to get your message through please prefix “Holding Tank” in the title.


If we accept such arguments, than we have to compare the size of each our object with the working diameter of our lens to assess resolution and sharpness.

The usual standard is that the smallest detail need be no finer than the focal length of the camera lens f divided by The lens plane is a flat surface drawn through the center of the lens and remaining perpendicular to the lens axis a line straight through the lens. The second plane is again one through the center of the lens, but this time parallel to the film.

In his opinion, it is better to describe DOF in terms of the resolution in the object field rather than concentrating on the characteristics of the final image. Again, I have to remind you that all of the above is the classical theory. But a number of questions still remain unanswered. The stool in Fig. The eyes remain blurry, and that is the point. Of course, Merklinger’s approach is basically correct.

Merklinger’s Photo Books

Which theory treats merklinge in a reasonable way? Now let us look at the same graph calculated exactly in accordance with our formula Fig. The essay by Ray Maxwell proclaims the end of Moore’s Law as it applies to photography.