Originally Posted by
Ole Tjugen
Hartmut Thiele lists a Landschaftsaplanat Ser. IV f: 10.5-15 in 58 to 600mm focal lengths, introduced in 1867.
And the Orthostigmat Serie D, two different types, 60-900mm f:10 (I) and f:8-10 (II), introduced in 1896. The Orthostigmat is 6 elements in 2 groups. I don't know why I wrote Collinear this morning - I must have turned another leaf...
There's also the 1865 Periskop, but that's 2 in 2. The rest are wide angle lenses, which the one in these pictures is not very likely to be.
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