File:Huygensův okulár.jpg
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![File:Huygensův okulár.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Huygens%C5%AFv_okul%C3%A1r.jpg/800px-Huygens%C5%AFv_okul%C3%A1r.jpg?20140317211730)
Size of this preview: 800 × 385 pixels. Other resolutions: 320 × 154 pixels | 640 × 308 pixels | 1,024 × 493 pixels | 1,740 × 838 pixels.
Original file (1,740 × 838 pixels, file size: 173 KB, MIME type: image/jpeg)