Super-Wide Ansie Projection Mapping 
By 
Heinz Grüner, Rochester, 
Instrumentation 
N. Y. 
ABSTRACT 
Super wide angle aerial photography for mapping 
purposes as supported by the 120° lens designed by 
Dr. L. Bertele has widened the field of application of 
photogrammetry particularly in small scale mapping. 
Several instrumental solutions are available for the 
restitution of 120° photography. In the category of 
direct projection plotters a new projector has been 
added to the Balplex plotter series widely used for the 
conventional 90° photography. The lens of the super 
wide angle projector has 6 elements. Its notable opti 
cal performance is achieved by new methods of centering 
and calibration. The illuminator is a reflective condens 
ing system produced by replication from a master ellip 
soid. A special automatic engine has been developed to 
produce ellipsoid masters of high precision and various 
dimensions for a variety of optical applications. The 
new superwide angle projector is used on the standard 
Balplex supporting equipment. It has undergone a series 
of laboratory and performance tests which have led to 
highly satisfactory results. 
Since the advent of the Superaviogon lens designed 
by Dr. L. Bertele it became evident that aerial photo 
grammetry had been presented with a new tool destined 
to widen its range of application and its economic 
significance. It may well be conceded that the step 
from 90° to 120° of angular coverage of an aerial photo 
graph has not caused so much of an instrumental and