JPS6074138U - Underexposure warning device for strobe photography - Google Patents
Underexposure warning device for strobe photographyInfo
- Publication number
- JPS6074138U JPS6074138U JP1983165895U JP16589583U JPS6074138U JP S6074138 U JPS6074138 U JP S6074138U JP 1983165895 U JP1983165895 U JP 1983165895U JP 16589583 U JP16589583 U JP 16589583U JP S6074138 U JPS6074138 U JP S6074138U
- Authority
- JP
- Japan
- Prior art keywords
- warning device
- strobe
- comparing
- output signal
- circuit
- 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.)
- Granted
Links
Landscapes
- Exposure Control For Cameras (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、本考案の一実施例を示すストロボ撮影用の露
光アンダ警告装置の電気回路図、第２図は、上記第１図
中の乗算回路の具体的な電気回路図、第３図は、上記第
１図に示した発振回路のガイドナンバー発振周波数の関
係を示す特性図、第４図は、本考案の他の実施例を示す
ストロボ撮影用の露光アンダ警告装置の電気回路図、第
５図は、上記第４図中の２乗回路の具体的な電気回路図
、第６図は、上記第４図中のＶ−Ｆコンバータ回路の具
体的な電気回路図、第７図は、第５図に示したＶ−Ｆコ
ンバータ回路の発振波形図、第８図は、ガイドナンバ２
０、絞り値Ｆ４の時の露光−距離の関係を示す特性図、
第９図は、上記第４図の動作説明をするための線図、第
１０図は、上記第４図の動作結果をまとめて示した説明
図、第１１図、第１２図は、距離値検出回路の他の例を
それぞれ示す電気回路図である。
１・・・ストロボの電気回路、２・・・制御回路部、６
・・・発振回路（ガイドナンバ信号発生手段）、■・・
・絞り値検出回路（演算手段）、２５−・・距離値検出
回路（演算手段）、４６・・・２乗回路（ガイドナンバ
信号発生手段）、４７・・・Ｖ−Ｆコンバータ回路（ガ
イドナンバ信号発生手段）、ＯＰ３・・・コンパレータ
（比較手段）、ＬＥＤｌ・・・警告表示用発光ダイオー
ド（表示装置）。
−一層
Ｃ瞥
山−」Ｎ １ リ６７
ｍFig. 1 is an electric circuit diagram of an underexposure warning device for strobe photography showing an embodiment of the present invention, Fig. 2 is a specific electric circuit diagram of the multiplication circuit shown in Fig. 1 above, and Fig. 3 is a characteristic diagram showing the relationship between the guide number oscillation frequency of the oscillation circuit shown in FIG. 1, and FIG. 4 is an electric circuit diagram of an underexposure warning device for strobe photography showing another embodiment of the present invention. FIG. 5 is a specific electrical circuit diagram of the square circuit in FIG. 4, FIG. 6 is a specific electrical circuit diagram of the V-F converter circuit in FIG. 4, and FIG. , the oscillation waveform diagram of the V-F converter circuit shown in Fig. 5, and Fig. 8 shows the guide number 2.
0, a characteristic diagram showing the relationship between exposure and distance when the aperture value is F4,
Figure 9 is a diagram for explaining the operation of Figure 4 above, Figure 10 is an explanatory diagram summarizing the operation results of Figure 4 above, Figures 11 and 12 are distance values. FIG. 7 is an electric circuit diagram showing other examples of detection circuits. 1... Strobe electric circuit, 2... Control circuit section, 6
...Oscillation circuit (guide number signal generation means), ■...
・Aperture value detection circuit (calculation means), 25-... Distance value detection circuit (calculation means), 46... Square circuit (guide number signal generation means), 47... V-F converter circuit (guide number signal generation means) OP3...Comparator (comparison means), LEDl...Light emitting diode for warning display (display device). -Mt. Cbetsu-”N 1 67 m
Claims (1)
手段と、 ストロボのガイドナンバに対応する信号を発生する手段
と、 この発生手段からの出力信号と上記演算手段からの出力
信号を比較して出力信萼を出す比較手段と、 この比較手段からの出力信号により、適正露光の可否を
撮影前に警告する表示装置と、を具備したことを特徴と
するストロボ撮影用の露光アンダ警告装置。[Scope of Claim for Utility Model Registration] Means for calculating lens aperture information and distance information to a subject, means for generating a signal corresponding to a guide number of a strobe, and an output signal from this generating means and the above-mentioned calculating means. A strobe photographing device comprising: a comparing means for comparing output signals from the comparing means and outputting an output signal; and a display device for warning before photographing whether proper exposure is possible or not based on the output signal from the comparing means. Under-exposure warning device for
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983165895U JPH063382Y2 (en) | 1983-10-26 | 1983-10-26 | Display device for flash photography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983165895U JPH063382Y2 (en) | 1983-10-26 | 1983-10-26 | Display device for flash photography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6074138U true JPS6074138U (en) | 1985-05-24 |
| JPH063382Y2 JPH063382Y2 (en) | 1994-01-26 |
Family
ID=30363326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983165895U Expired - Lifetime JPH063382Y2 (en) | 1983-10-26 | 1983-10-26 | Display device for flash photography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063382Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55115025A (en) * | 1979-02-28 | 1980-09-04 | Olympus Optical Co Ltd | Strobe synchronized camera system |
-
1983
- 1983-10-26 JP JP1983165895U patent/JPH063382Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55115025A (en) * | 1979-02-28 | 1980-09-04 | Olympus Optical Co Ltd | Strobe synchronized camera system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH063382Y2 (en) | 1994-01-26 |
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