leo.roos:
In the twilight zone: a7 + Meyer Anastigmat Trioplan 1:5 Foc 4 ¼ inches (1930; no name folder)
leo.roos:
Boltavit I with Boltar 1:7.7 f = 40mm, 1935 (with Photavit I with Meyer Trioplan 1:3.5 F=4,2cm, 1937, in the background)
leo.roos:
a7 + Meyer Trioplan 1:4.5 f=4cm, 1936 (with Boltavit I and Photavit I in the background)
leo.roos:
Photavit I with Meyer Trioplan 1:3.5 F=4,2cm, and Photavit I with Meyer Trioplan 1:4.5 f=4cm (with Boltavit I in the background)