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View Full Version : Zeiss Anastigmat Patent Ross London 119mm, f/12.5, №173


electronick
25-Jun-2023, 09:02
Hello, friends.

Maybe somebody would be so kind and tell about that lens more information - first of all its production year.
Thank you in advance!
https://i122.fastpic.org/thumb/2023/0625/64/120a73664ad0237e84436c6d7aa8cd64.jpeg (https://fastpic.org/view/122/2023/0625/120a73664ad0237e84436c6d7aa8cd64.webp.html) https://i122.fastpic.org/thumb/2023/0625/d2/797fe49ee7c58bf766633fefa924b6d2.jpeg (https://fastpic.org/view/122/2023/0625/797fe49ee7c58bf766633fefa924b6d2.webp.html) https://i122.fastpic.org/thumb/2023/0625/86/9abbc40e32bbbdc8d4d76d387f18fc86.jpeg (https://fastpic.org/view/122/2023/0625/9abbc40e32bbbdc8d4d76d387f18fc86.webp.html) https://i122.fastpic.org/thumb/2023/0625/11/f7a2e08c73feffd20be14cb9792d3e11.jpeg (https://fastpic.org/view/122/2023/0625/f7a2e08c73feffd20be14cb9792d3e11.webp.html) https://i122.fastpic.org/thumb/2023/0625/cb/5bd5dd3922bd962db41536bed1f32ecb.jpeg (https://fastpic.org/view/122/2023/0625/5bd5dd3922bd962db41536bed1f32ecb.webp.html)
Vaidotas
25-Jun-2023, 09:37
Beware - infected links on thumbnails.
Steven Tribe
27-Jun-2023, 02:51
Mid to late 1890’s. Zeiss patent lenses made by Ross had own their serial number progression.
This is a series IV wide angle design (Protar) covering just 12x15cm. Front lens has a diameter of 12mm. 80 to 100 degrees.
electronick
2-Jul-2023, 02:55
Mid to late 1890’s. Zeiss patent lenses made by Ross had own their serial number progression.
This is a series IV wide angle design (Protar) covering just 12x15cm. Front lens has a diameter of 12mm. 80 to 100 degrees.
Many thanks about the answer!
arri
3-Jul-2023, 07:36
I guess this lens covers much more than 12x15cm.
I have a f/9 75mm Protar and Zeiss listed it with 90° angle of view and it really covers 4x5 inch.
The f/12.5 protar lenses have a larger angle of view. I mean 110° when I remember right.
So it should cover 8x10 inch.
Don't await an extreme sharpness but it is usable.
Steven Tribe
4-Jul-2023, 10:48
No it is the Series V (F1:18) which is the 110degree WA. The 112mm focal length covers 5x7”. The series IIIa (F1:9) has a 97 deg coverage so the no.3 ( focal length 172mm) is OK for 5x7”.