Nikon LS-10E instruction manual ·----~~~~-~

[b)

[a]

j

~ ~

..=---------------------mmmuuum_.._----=---

Fig. 4.16 Non-flat film

Film Incurve

Nlcht planliegender Film

[c)

	[d]	J	~
-,-	~	_______ m _____
	1·---""-~~~~-~""""'------			I
[e)		I
		[ij

Fig. 4.17 Optimizing focus for a section of non-flat film Mise au pOint optlmlsee sur un film Incurve

Fur einen Tell elnes nlcht planllegenden

Blldes optlmlerte Fokusslerung

[g)

Fig. 4.18 The focus control on the scanner La mise au pOint sur Ie scanner Die Feinfokusslerung am Scanner

Non-flat film

The film surface is not necessarily flat. It may be curved for a number of reasons . If the film is not flat, the scanner can not accurately focus on the entire film surface at the same time. The most common cause of non-flat film is bowing caused by heat. This often occurs when slides are used in slide projectors before scanning . The heat of the projection bulb will cause the film in the slide to bow. This is shown in Figure 4.16.

[a]Non-flat film

[b)Cross section of slide mount

It is therefore necessary for the user to compromise on the focus based on the area of the slide being scanned . If only a section of the film is scanned, it may be possible to adjust the focus to best suit the area of the film being scanned . This is shown in Figure 4.17.

[c)Non-flat film

[d)Optimized focus position

[e)Normal detent focus

[f]Cross section of slide mount

Glass mounts can be used to help flatten non-flat film .

The fine focus control

The fine focus control is located on the front of the scanner as shown in Figure 4.18. This knob can be easily adjusted with the thumb. A center detent is provided to center the film in the field of focus . Rotating the knob in either direction will affect the focus .

[g)Focus control

A scan is taken in the field of interest at maximum resolution. The result is displayed in a window on the screen . The user can see the result of changing the focus control as the scan is taken . Refer to the manual focusing explanation in the driver manual for the correct control.

4-5 Calibration

The scanner is self-calibrating . A calibration procedure occurs automatically during power-up. This procedure typically takes about thirty seconds. It is ·possible to force a calibration through software. This may be advantageous immediately before an important scan .

Due to the patented light source, there is no warm up time necessary for the scanner. Once the scanner has performed its power-on calibration , it is ready to go.

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