279 
With the used enlargement, the principal point of the images with a size of 24 mm 
* 36 mm is located 50 mm outside the centre of the photos. The corresponding 
base to height ratio 100 : 380 = 1 : 3.8 enables a sufficiant stereoscopic 
impression. 
The lens distortion is reaching 150 pm. It is mainly radial symmetric, but not in 
relation to the principal point. The point of symmetry is located 6 mm beside the 
photo centre. The inner orientation and also the lens distortion cannot be 
reproduced, it will be influenced by any change of the focus and enlargement. In 
addition the photo resolution has been poor. By theese reasons a switch was made 
to the partial-metric camera Rolleiflex metric 6006 and 3003 with macro converter 
and macro lenses. 
4. Rolleiflex metric with macro lenses 
The Rolleiflex metric includes a reseau infront of the film. The 6006 has a photo 
size of 60 mm * 60 mm, the 3003 24 mm * 36 mm. The extended image size of 
the 6006 includes the advantage of a better angular resolution. 
Rolleiflex metric 6006 | Rolleiflex metric 3003 
2-fold converter 
yes 
yes 
yes 
yes 
no 
adapter ring 
34 mm 
68 mm 
102 mm 
2 * 
3 * 
focal length 
218 mm 
275 mm 
337 mm 
258 mm 
138 mm 
photo scale 
1 : 1.2 
1.7 : 1 
2.5 : 1 
2.6 : 1 
1.5 : 1 
mean distortion 
31 pm 
13 pm 
14 pm 
18 pm 
10 pm 
table 1: used Rolleiflex configurations 
Because of the small view angle no reseau correction for compensation of the film 
flattening was necessary. The inner orientation has been determined with the same 
three-dimensional control pattern described before. 
With long focal length in the normal case only a poor base to hight relation can be 
reached. So a tilted view to the object is necessary. The handled samples have 
been small but the cameras have had a very long combination of adapter rings, 
converters and lenses, by this reason the object was located on a tilting table and 
the camera has been fixed. 
fig. 4 
configuration for 
Rolleiflex metric