AT29610B - Variable filter for photography. - Google Patents

Variable filter for photography.

Info

Publication number
AT29610B
AT29610B AT29610DA AT29610B AT 29610 B AT29610 B AT 29610B AT 29610D A AT29610D A AT 29610DA AT 29610 B AT29610 B AT 29610B
Authority
AT
Austria
Prior art keywords
photography
variable filter
filters
colorless
diaphragm
Prior art date
Application number
Other languages
German (de)
Inventor
Charles Louis Adrien Brasseur
Original Assignee
Charles Louis Adrien Brasseur
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE1905176320D external-priority patent/DE176320C/de
Application filed by Charles Louis Adrien Brasseur filed Critical Charles Louis Adrien Brasseur
Application granted granted Critical
Publication of AT29610B publication Critical patent/AT29610B/en

Links

Landscapes

  • Blocking Light For Cameras (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

  

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 Empfindlichkeit gegen die verschiedenen Farben anhaften und ebenso leicht auch diejenige Dämpfung bewirken, welche der Natur des Lichtes, wie es die   atmosphärischen Verhältnisse   bedingen, entspricht. 
 EMI2.1 
 farblos gelassen ist. Durch entsprechende Verschiebung kann dieser farblose Teil für die
Zwecke der gewöhnlichen Photographie verwendet werden. Er hat lediglich den Zweck, eine Verschiebung der Bildebene bei Nichtbenutzung eines Filters   zn   verhindern. 



   Fig. 4 zeigt die schon erwähnte Anordnung, bei der die eine   Hälfte   beider Gläser l mit einer gleichförmigen Färbung m versehen, die andere   n   farblos gelassen ist. Bei Be- nutzung verschiedener Blenden bietet diese Form den   Vorteil, dass   sie mittels einer Skala leicht ermöglicht, die verschiedenen Farben in bestimmtem Verhältnis einwirken zu lassen. 



   Ist beispielsweise ein Viertel der Blendenöffnung farblos, drei Viertel farbfilternd eingestellt, so ist es leicht bei Wahl einer kleineren Blende unter Benutzung der Skala das gleiche
Verhältnis, welches durch die Veränderung der Blendenöffnung   gestört wurde,   wieder her- zustellen,
Ohwohl für Photographie jeder Art   brauchbar, bedeutet diese Anordnung einen be-     sonderen   Vorteil für   mehrfarl) ige Photograpie,   indem durch Verstellung von mehreren
Filtern leicht die richtige Farbe des Filters erzielt werden kann.



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 Sensitivity to the different colors adhere and just as easily produce the attenuation which corresponds to the nature of light as determined by atmospheric conditions.
 EMI2.1
 is left colorless. By shifting this colorless part for the
Can be used for ordinary photography purposes. Its only purpose is to prevent the image plane from shifting when a filter is not used.



   4 shows the arrangement already mentioned, in which one half of the two glasses l is provided with a uniform color m, the other n is left colorless. When using different screens, this form has the advantage that it easily enables the different colors to act in a certain ratio by means of a scale.



   If, for example, a quarter of the diaphragm opening is colorless and three quarters is set to be color filtering, it is easy to do the same if a smaller diaphragm is selected using the scale
Restore the ratio that was disturbed by the change in the aperture,
Although it can be used for photography of any kind, this arrangement has a particular advantage for multi-color photography, in that by adjusting several
Filtering the correct color of the filter can easily be achieved.

Claims (1)

PATENT-ANSPRUCH' : Vorrichtung an photographischen Objektiven zum Ausschalten von Lichtstrahlen durch Filter von ungleichmässiger, stetig oder unstetig sich ändernder Absorptionsfähigkeit, da- durch gekennzeichnet, dass diese Filter in nnmittelbarer Nähe der Blende, parallel zu ihr uud senkrecht zur optischen Achse, verschiebbar angebracht sind. EMI2.2 PATENT CLAIM ': Device on photographic lenses for switching off light rays through filters of non-uniform, steadily or discontinuously changing absorption capacity, characterized in that these filters are mounted in the immediate vicinity of the diaphragm, parallel to it and perpendicular to the optical axis. EMI2.2
AT29610D 1905-06-08 1906-05-31 Variable filter for photography. AT29610B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1905176320D DE176320C (en) 1905-06-08

Publications (1)

Publication Number Publication Date
AT29610B true AT29610B (en) 1907-08-26

Family

ID=5697409

Family Applications (1)

Application Number Title Priority Date Filing Date
AT29610D AT29610B (en) 1905-06-08 1906-05-31 Variable filter for photography.

Country Status (1)

Country Link
AT (1) AT29610B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286989A2 (en) * 1987-04-13 1988-10-19 Fuji Photo Film Co., Ltd. Exposure control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286989A2 (en) * 1987-04-13 1988-10-19 Fuji Photo Film Co., Ltd. Exposure control device
EP0286989A3 (en) * 1987-04-13 1988-11-23 Fuji Photo Film Co., Ltd. Exposure control device

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