BEE 
vedge 
ed filter) 
  
  
Fig. 14: 1:1 window of Fig. 13 
5. SUMMARY 
The paper summarises some first results of a quality 
investigation of the new Kodak DCS Pro Back 645M mounted 
to a modified Mamiya body. Two useful focal lengths (35mm 
and 24mm) are available for this camera. The camera can also 
be operated by standard medium-format film material. 
The geometric accuracy has almost proven the expected level 
of 1:200000 of inner accuracy. With the performed standard 
testfield calibration the accuracy is increased compared to usual 
cameras such as Kodak DCS 460 or Fuji FinePix S1. Due to 
mechanical instability of the mounting interface between 
camera body and sensor back, standard bundle adjustment 
programs fail if no image-variant interior orientation is 
introduced. The extended camera model based on image variant 
shift of the perspective centre and a finite element sensor 
correction grid leads to sufficient adjustment results. The 
exterior accuracy verified by calibrated reference scale bars is 
still not sufficient. Further investigations have to be carried out 
in this respect. 
The radiometric quality of the camera is surprisingly good. The 
internal camera software provides a number of different 
exposure programs and image enhancements that result in 
excellent color images with high resolution. The built-in 
infrared filter should not be dismounted since it would result in 
color errors and limited radiometric resolution. 
+47 
Although this report can only present very first results it looks 
as if this camera/sensor unit is a powerful device for industrial 
photogrammetry, but for architectural purposes too. The recent 
costs of approximately 20.000 Euro depict a good price- 
performance ratio. 
6. REFERENCES 
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Hastedt, H., Luhmann, T., Tecklenburg, W., 2002. Image- 
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