T. a TT E = = ep rats i A Ml. x : Us Rif = #3 ois vege a oec wan 
A A SN EDGE DE RES RE Mu MEN LEN NO SAS VASE QE ACIE AN ANDR M DRM MAR EAE — 
Allowing for the increased quality of aerial survey lenses, 
countermeasures should therefore be taken into consideration 
when meeting with highest requirements in large altitudes. 
4, Closing remarks 
  
  
  
  
In accordance with the considerations mentioned at the beginning 
the results of theoretical calculations given here have to be 
elaborated and confirmed through practical tests. In particular, 
more detailed knowledge should be obtained of environmental 
conditions under which aerial survey cameras are used, In this 
field, activities of Commission I - ISP would be particularjy 
valuable and most welcome. 
Ihe calculations were made in the mathematical department for 
photogrammetric optics of Carl Zeiss, Oberkochen under super- 
vision of Dr. H. Zügge. The author is very much obliged for expert 
assistance and friendly discussions.