In evaluating equipment, therefore, in relation to their contributions to the deleterious effects on the feather we find that the worst offender has been the camera which contributes many permanent errors due to its inconsistency and due to the fact that it does not have a sufficiently wide completely clear overlap particularly at the shortest focus distances and the widest apertures. It is imperative that these conditions be corrected.

    The second most serious offender is the projector system which cannot maintain a perfectly balanced light on the screen in terms of both color and brightness. It has been demonstrated that surprisingly minute (almost immeasurable) differences between panels affect the appearance of the blend line considerably. Actual panel changes are easily measurable.

    The positive stock is an offender in a sense because its characteristics predict certain changes in appearance, position and color with changes in background. Some of these might be programmed out by increasing the complexity of the printer considerably. The alternative is to live with it and to avoid the situations which lead to trouble in photography.

    The printer itself is capable of making rather fine blend lines, accurately placed. Its major problem is the fact that both sides are programmed together and that there are too few position steps too far apart. These deficiencies are corrected in the second printer. The second problem with it is that the degree of control required is rather close, so that the rapid fading of filters requires constant critical control. In the second printer this might be reduced somewhat by removing the filters to a cooler part of the system where the light beam is not so dense. Most important of all, however, is the fact that the printer would work even better with a wider feather which requires a change in camera standards to yield the required clear overlap.


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