T Ii E DISTORTION PREDICTABLE AND CORRECTED B y R o N I~ A PROJECTIONS D L r=- E F o R u K 1---< I 1-- - L"~ D ----+--d~ - _ I ,~ I-'~ I i D 19 7 by Ronald Fedoruk T here is no denying that the simplest projection angle locates the projector perpendicular to the center of the screen. \\'e ha\'e been led to believe that 90° is the onl~' angle that guarantees an~' relief from that \vorst of all projection enemies: Distortion. ;\.\"oiding an~' kind of distortion has become, in too many cases, the prime factor in determining the positioning of projectors and surfaces. Irregular positions and oblique angles are adopted only in cases ofabsolute necessit~·. The resulting distortion is usuall~' imperfectl~' resoh'ed or not resolved at all. There are obvious limits to this technolog~',and, in determining the location ofprojectors, there may be other considerations that will be as important as distortion. The scenographer should be able to usc the principles ofdistortion to ach·antage. The following is a geometrical approach to predetermining the exact amount of distortion and for producing corrected projections. However confusing this approach becomes in application, it is really based on the simple geometl-y used to dewlop a perspective drawing from a ground plan.