A,
Ihe Photogrammetric Camera Lenses of VEB Carl Zeiss JENA and the Cali-
bration Techniques for Photogrammetric Cameras
Wirtz, Gerhard, Dr.-Ing., VEB Carl Zeiss JENA, Carl-Zeiss-StraBe 1,
GDR-69 Jena
le The Photogrammetric Camera lenses of VEB Carl Zeiss JENA
Continuing the tradition of the development and production of photo-
&rammeiric lenses VEB Carl Zeiss JENA successively developed from 1968
to 1976 the aerial camera lenses Lamegon PI 4.5/150, Super-Lamegon PI
506/90 and Lamegor 5.6/300 for the image size 2323. The additional de-
signation PI (for Pan-Infra) means that such lenses can without any li-
mitation be used for exposures on films, which are sensitive in the pan-
chromatic and infrared spectral regions. The characteristics of the afore-
mentioned lenses have repeatedly been described [3], [4], (7]e Table 1
shows the most important characteristic data,
Parallel to the development of the PI aerial camera lenses new lenses
were designed for terrestrial-photogrammetrical measuring camerase
The result of this development is the Lamegon 5.6/55 for the Stereo-
metric Camera SMK 5.5/0808 and the Lamegon 8/100 for the Universal Mea-
suring Camera UMK 10/1318, It is a novelty of the UMK compared with
the conventional measuring cameras that merely by actuating a control
knob it can continuously be focussed for distance settings from oo to
1.4 m with indications in steps corresponding to a change in the image
distance of 0.4 mm. The number of settings amounts to 19. The control
knob can be set to two index marks depending on wether panchromatic or
infrared exposures are to be made. When altering the distance setting
distortion changes in a way shown in Table 2. Only the standard distor-
tion values for the object distances oo and 1.4 m have been denounced.
The values for all other range settings lie between these two data with
an alternation of 1,6 um from setting to setting approximately. The
standard distortion vhlues as well as those of all the following ones
refer to panchromatic plate material without the use of a colour filter,
Upon request the UMK can also be equipped with a Lamegon 8/100 N, whose
minimum distortion of 29.7 um lies at an object distance of 2,1 m.
The calibrated focal lengths for the individual distance setiings are
gained from the sum of the calibrated focal length c, determined for
"oo" and an additional quantity (ic, . Both data are^recorded on each
photograph. It should be noted that Ac, does not correspond to the
change in the image distance, since ,\c does not only depend on this,
but also on the position of the entrance pupil and distortion.
RT CE
LEGAME c3
ERE
RECA SR A RES
SER
EI S
La NE
