DE6925696U - APERTURE ADJUSTERS AND INDICATORS - Google Patents

Description

APPARATEWERKE 8510 FURTH / BAY.

INH PAUL METZ

Patent department Our AZ: Date: Bl.- ··

A 3k7 June 25, 1969 1

Aperture adjuster and indicator

The subject of the innovation is an aperture adjuster and indicator for an electronic flash unit with automatic exposure control.

While the first electronic flash units for automatic exposure control with a very specific amount of light let the flash limiting device respond, i.e. a specific aperture for each film speed demanded, there are now designs that allow the use of different film speeds for one and the same film speed Allow shooting f-stops. Such a gradation in the Light measuring device can be achieved by engaging in the storage device, with the threshold value of the lightning limiting arrangement remaining the same, by changing the threshold value the lightning limiting arrangement or by varying the light sensitivity of the light measuring arrangement.

The arrangement according to the invention is used for setting the light measuring device to a sensitivity that within the control range of the automatic and after selecting the desired camera shutter for the recording conditions ensures optimal flash exposure. To this Purpose is once a slide with a film change by means of an adjusting knob or some other adjustment aid a film speed dial so that the film speed is opposite a setting mark. Ever Recording is then moved a second slide with setting magnifier and setting mark so that this setting mark is on the desired camera aperture in the second scale of the above

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APPARATEWERKE 8510 FURTHBAY.

¹ NH PAUL MEr /

Patent department unset az.

A 347

O, mm

June 25, 1969 2

called first slide shows. Through a window of the now set second slider, depending on the color of the Document - green or red - admissibility or inadmissibility of the selected setting can be seen. Simultaneously The indication of the distance appears under the mark of the setting slide for the range of the flash in automatic mode (with unreduced flash duration), an indication that at the same time represents the distance to the object for the set f-number in non-automatic operation.

In the case of an electronic flash unit with power graduation, the maximum distance to the object changes for the same aperture in accordance with the reduction in light output. the Slider with the range or distance information of the Automatic operation is linked to the power graduation switch.

By setting the focusing lens and mark to the camera aperture required for taking the picture, the light sensitivity is increased at the same time the light measuring arrangement in the automatic part of the electronic flash unit changed. The carrier of the light attenuating members which are connected upstream of the light-sensitive component is either fixed with the latter slider connected or taken along via a suitable translation. When changing the attenuation levels, the setting of the slide with the setting mark to set values, full or half aperture values. the individual f-stops can then duroh locking positions be secured in the wej of the slide.

The most common film speeds are not behind same steps (geometric series) as the f-numbers

APPAGATEWEBKE 8510 'URTH BAY.

INH. PAUL MET /

Patent department our αγ

Date ■

Bint; ■

A 3 ^; i7 June 25, 1969 3

set. Between the sensitivity values corresponding to a geometric series, there are intermediate values, such as 17 DIN, I9 DIN and 20 DIN. The setting on Intermediate values of the film speed would lead to the synchronization between the camera aperture graduation and the gradual Interfere with the light sensitivity setting of the light measuring device. The use of a light attenuation device with A constant change in attenuation allows the exact assignment of the film with a precise setting of the film speed the correct sensitivity of the light measuring arrangement to the desired Camera aperture level.

The innovation concerns an aperture setting plate and indicator for an electronic flash unit with automatic exposure control, characterized in that a setting mark is attached to a slide which points to the photo-taking the desired f-number of the f-stop scale of another slider is set, with the first Slide is fixed or connected via a gear to a carrier with light attenuating members and is moved in front the light-sensitive component of the light-measuring device for setting the light-sensitivity of this light-measuring device O

The innovation is based on the drawings in an embodiment described.

For the sake of simplicity, an arrangement with linear slides will be described «Without any change in the inventive concept can be used instead of the linear slide valve or e.g. with regard to the available space, the damping means can be arranged on a circular disc, which by means of rack and pinion or

692569

APPABATfWESKt 8510 FURTH BAY.

NH -AU ': - MET /

Patent department our a; ·

A 347

June 25, 1969

blue

a suitable other transfer for the slide adjustment is taken.

Instead of a visual display when the provided automatic range or a setting that no longer corresponds to the light output, can also a mechanical lock dtr adjustment means can be provided.

Figure l) shows the external view of the aperture adjuster and indicator according to the innovation. The arrangement - here with linear slides - consists of a body 1, which can also be part of the device housing or, in the case of two-part devices, part of the reflector rod and three independently movable slides r, b and c. Furthermore, a function switch a, with, for example, a position ka "full power" and a second position i = "half power ^{11 is} provided.

The slide r has a linear scale a with the film speed values and a linear scale ρ with diaphragm scales. Here are the ones that correspond to each film speed Camera aperture numbers with full light sensitivity of the light measuring arrangement on the same or adjacent Row.

By means of a handle b or the like. Each time the film is changed, the slide r is moved so that the mark e on the housing 1 and the corresponding film speed of the new film to coincide

The second slide b is coupled to the power switch h. In the case of two power levels, it is

APPABATEWEBKE 8510 FURTH BAY.

INH. PAUL METZ patent department

Our

D.iluin- Hliill

June 25, 1969 5

postponed by a fixed amount.

The third slider, c, has no lettering, he

is only with a carrier of the setting mark g, here

In the drawing, for example, an illuminated magnifying glass f which makes adjustment easier.

If the automatic exposure control is switched off, after setting the film sensitivity against brand e As with every aperture calculator, the camera aperture to be set for each recording distance on the scale of the slider b can be read off the scale ρ on slide r.

For operation with automatic exposure control, after a one-time setting of the film speed, only Slide c is set to the desired camera aperture with the marking. As long as in the window of the marker If the color appears green, the automatic system is working in the intended range.

The slide arrangement described above is shown in FIGS. 2) and 3) shown in section.

FIG. K) shows again in section the connection between the slide c and the carrier m of the light attenuating means η and FIG. 5) shows a section through the overall arrangement. Underneath the slide c, an insert s is provided which, through the window of the marking g and an opening in the slide, inclines the areas "green" and "red" j. The carrier m of the damping means n, which weaken the incidence of light on the light-sensitive component ο and thus control the light sensitivity of the light measuring arrangement, is firmly connected to slide c. ... - »■

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Claims (1)

APPARATEWEBKE 8510 FiIRIH BAY. INN. P Λ U I. METZ Patent Department Untier Λ /: Diilum: ΒΙίιΐι A 3Ί7 25.6.I.969 6 , 5 chut ζ talks 1) Aperture adjuster and indicator for an electronic flash unit with automatic exposure control, characterized in that a setting mark (g) is attached to a slide (c) which points to the f-number of the aperture scale (p) of another slide (r) required for taking photos. is set, whereby with the first slide (c) fixed or via a gear a carrier (m) with light attenuating members (n) is connected and is moved in front of the light-sensitive component (o) of the light measuring device to adjust the light sensitivity of this light measuring device O 2) Aperture adjuster and indicator for an electronic flash unit with automatic exposure control, characterized in that the slide (r) with scales to be set on the Aufhahmekaniera F-number (p) and the film speed (a) by means of an adjustment knob (d) compared to a The setting mark on the housing (e, l) is set to the sensitivity of the recording material used. 3) Aperture adjuster and indicator according to claim l), characterized in that a third slide (d) is provided which carries a meter scale on which under the setting mark (g) the range of the flash under automatic exposure control and at the same time dio Gcgonstandsentfernung when switched off the automatic exposure control can be read Date: APPAPiT [WEBKE BMO FURIH / BAY. INK. PAUL M F. T / Patent department unnor μ. Λ 3 ^ 7 when pressing the selector switch (h) for setting to full power or reduced light output of the flash unit in terms of the guide number change at the same time is moved. k) aperture adjuster and indicator according to claim l), characterized in that the setting mark (g) in the area of the slide (c) is expanded like a fork over a slot-like opening of the slide body, whereby an intermediate layer (s) between slide (c) and Housing body (l) becomes visible, whereby this intermediate layer (s) is colored green in the permissible working area of the automatic exposure control, while a red mark appears when the device is set to an area outside the working area. 5) aperture adjuster and indicator according to claim l), characterized marked that, to facilitate reading of numbers and setting of markings, on slide (c) a cylindrical illuminated magnifying glass (f) as a carrier for the marking (g) is appropriate. 6) aperture adjuster and indicator for an electronic flash device according to claim l), characterized in that the Slide (c, b, r) are designed as linear slide. 7) aperture adjuster and indicator according to claim l), characterized characterized in that the slides (c, b, r) are designed as concentric rotary slides.