FR17631E - Slider gives directly the exact draw and diaphragm for focusing - Google Patents

Slider gives directly the exact draw and diaphragm for focusing

Info

Publication number
FR17631E
FR17631E FR17631DA FR17631E FR 17631 E FR17631 E FR 17631E FR 17631D A FR17631D A FR 17631DA FR 17631 E FR17631 E FR 17631E
Authority
FR
France
Prior art keywords
focusing
diaphragm
exact
draw
gives directly
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Gabriel Cromer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GABRIEL CROMER
Original Assignee
GABRIEL CROMER
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
Application filed by GABRIEL CROMER filed Critical GABRIEL CROMER
Application granted granted Critical
Publication of FR17631E publication Critical patent/FR17631E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
FR17631D 1911-12-20 1913-04-21 Slider gives directly the exact draw and diaphragm for focusing Expired FR17631E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR438168T 1911-12-20
FR17631T 1913-04-21

Publications (1)

Publication Number Publication Date
FR17631E true FR17631E (en) 1913-10-13

Family

ID=1359099

Family Applications (1)

Application Number Title Priority Date Filing Date
FR17631D Expired FR17631E (en) 1911-12-20 1913-04-21 Slider gives directly the exact draw and diaphragm for focusing

Country Status (1)

Country Link
FR (1) FR17631E (en)

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