Digital Specialists

35mm Slides:
35mm film gauge most commonly used for both still photography and motion pictures, and remains relatively unchanged since its introduction in 1892 by William Dickson and Thomas Edison, using film stock supplied by George Eastman. The photographic film is cut into strips 1 3/8 inches or 35 mm wide — hence the name. The standard negative pulldown is four perforations per frame along both edges, which makes for exactly 16 frames per foot.

Slides are still generally preferred by professionals and many amateurs when working with traditional film. Slides are often sharper and have better colour reproduction. Generally, slides have a longer life span than colour prints.

Direct positive slide film is less forgiving of exposure errors than the negative – print – and development process chain. With negatives, the overall value may be sensed after processing and the exposure of the positive image controlled to compensate. The simplest point and shoot and disposable cameras do not even control exposure, a demonstration of the wide exposure latitude of the processes. It is also more cumbersome to display if only a few images are to be shown, although small battery powered direct viewers are available and suitable for use by one or two viewers.

A slide is a special type of transparency intended to be projected onto a screen using a slide projector. This allows the photograph to be viewed by a room-full of people at the same time. Slides were at one time an important medium for presentations, but LCD projectors, though inferior in resolution and color reproduction, have largely replaced traditional slide projectors for this purpose.

The most common form of modern slide is the 35mm slide, essentially a positive-image printing onto the standard 35mm film used in the movie industry, then placed inside a cardboard or plastic shell. Older projectors used a sliding mechanism to manually pull the transparency out of the side of the machine, where it could be replaced by the next image, and it is from this that we get the name "slide". Modern projectors typically use a carouselthat holds a large number of slides, and viewed by a mechanism that automatically pulls a single slide out of the carousel and places it in front of the lamp.

120mm Slides
Same as 35mm but obivously larger in size. Used mainly by professional photographers. Click on the photo to see an enlargement.