Nikon LS-10E instruction manual Focus, Thickness of the slide mount, Film type

4-4 Focus

There may be times when it is necessary to adjust the focus control in order to achieve maximum scann ing performance. Focus control becomes more significant when a high resolution scan is taken . High resolution typically ranges from Pitch=1 to Pitch=2 scans .

Focus is affected by the position of the film with respect to the optics in the scanner. The most common parameter that can cause focus problems is the thickness of the film mount. Fortunately, the scanner utilizes a self-adjusting focus mechanism. This mechanism automatically centers the film in the center of the focal region regardless of the thickness of the slide mount.

It should be noted that the focus control of the scanner cannot be used to sharpen unfocused film . These are some software processing techniques that can be used to help sharpen unfocused film .

The following is a list of things that can affect focus .

Thickness of the slide mount

There is a wide variety of slide mounts popularly used today. The thickness of these mounts affects where the film will be positioned within the slide mount and consequently within the scanner. This scanner utilizes a self-adjusting focus mechanism . This mechanism automatically centers the film in the center of the focal region regardless of the thickness of the sl ide mount.

The film type

Many film types are used today . The film material, film thickness , dyes and emulsions used on the film can affect how light passes through the film and consequently affects the focus .

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