File:Bertele US1975678A (Sonnar f1.5, 1932).svg
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Captions
Captions
Dr Ludwig Bertele's ''Sonnar'' design (1932)
Summary[edit]
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| Description |
English: Dr Ludwig Bertele's Sonnar design (1932), with a maximum aperture of f/1.5, redrawn from geometry listed in US Patent 1,975,678. |
| Date | |
| Source | Own work |
| Author | Mliu92 |
Licensing[edit]
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I, the copyright holder of this work, hereby publish it under the following license:
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:57, 21 March 2023 | | 830 × 700 (2 KB) | Mliu92 (talk | contribs) | Uploaded own work with UploadWizard |
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