Negative Format (Size and Shape)

Fine-Art photography has been justifiably dominated by "large-format" cameras, first by necessity, then by preference.

Given the time and conditions to set-up a 4x5 or 8x10 camera, and the ability of the photographer to exploit it, the images can have a quality not possible with smaller formats. With the same film type, and the same size print, a larger negative will always provide smoother tonality, and, depending on the optics, and film registration, sharper detail. Large negative sizes capture more data and need less enlargement, but require longer lenses which magnify camera movement and reduce depth of field. Faster film (or a tripod) is required to control the former, and smaller apertures, the latter.

Each camera format from 8 x 11 millimeters to 8 x 10 inches produces a set of opportunities and constraints which combine to form a "format personality". The advantages of each format should be exploited and expectations adjusted to the system's assets. One is not better than the other, they are just different.

Enlargement in this discussion refers to linear enlargement. An 8" x 10" print from a 4" x 5" negative is described as "2x". Admittedly it has four times the area, four times the silver content, four times the pixel count, AND four times the area NOT covered by silver. Arguments can rage between the usefulness of linear vs. aerial measurement of enlargement, but as a photographer, not a physicist, and since linear measurement is the basis for "lines per inch", "pixels per inch" and "dots per inch", I will use "linear" measurement to describe enlargement.

It is noteworthy that advances in film technology, designed to produce APS results comparable with that of the 35mm format, also mean better film for the Minox!

The aspect ratio of negatives range from square, with a ratio of

1,

through the 4:5 ratio of

1.25,

to 35mm with a ratio of

1.5,

and finally compared with the "Golden Section" at

1.618...

The aspect ratio of the final image has a significant impact on the degree of enlargement required. Higher aspect ratios favor the 35mm, APS, and panorama formats, while lower ratios favor "medium format" square negatives. Since each image has its own "best" shape, which rarely matches the shape of the negative, comparisons of one format with another are risky.

The following table shows various formats with the enlargement factor necessary to produce prints 3.5 inch high. Some loss of data in the final print is always present when producing standardized print sizes. It is worthwhile noting that the APS "Panoramic" format requires nearly as much enlargement as the Minox format!