Sua resolutio(2 000 × 1 301 elementa imaginalia, magnitudo fasciculi: 613 chiliocteti, typus MIME: image/jpeg)

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Summarium

Descriptio
English: A laboratory diary of Finnish astronomy professor Yrjö Väisälä. The text is written in 1929. On the pages seen here Väisälä describes the principle of 'a new telescope for photography'. Väisälä never published this concept and few years later Estonian Bernhard Schmidt invented the same construction which is nowdays known as Schmidt camera.
Datum
Fons Opus proprium
Auctor Xepheid

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depicts Anglica

copyrighted Anglica

29 Iunii 2009

exposure time Anglica

0.01 secundum

f-number Anglica

4

focal length Anglica

7.126 millimetrum

ISO speed Anglica

80

media type Anglica

image/jpeg

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recentissima14:24, 7 Iulii 2009Minutum speculum redactionis 14:24, 7 Iulii 2009 factae2 000 × 1 301 (613 chiliocteti)Xepheid{{Information |Description={{en|1=A laboratory diary of Finnish astronomy professor Yrjö Väisälä. The text is written at 1929. On the pages seen here Väisälä describes principle of 'a new telescope for photography'. Väisälä never published this

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