Minolta Flashmeter III

Ambient light readings

Minolta Flashmeter IV
1. Move all sliding switches on the left side to upper position. 2. Press RECALL/ON. Set ASA speed. 3. Move measuring mode selector to AMBI. 4. Move function selector to FNo. and select 5.6 with sliding switch. 5. Place Booster 1 metering probe on the ground glass. Shield ground glass against stray-light. Stop down the lens to working aperture. Switch the Booster 1 probe to M (LED lit). Press measuring button on the Flashmeter IV. 6. Read odd exposure-time and deviation, e.g.: 5.7 7. 7. Correction: (example: FNo. 5.6 7) If possible: Move the light source or reduce the output by 7/10 EV. Divide exposure time in half and open the lens by 3/10 f-stops. 8. Control measurement 0.0.0.1.1.1.1.1.1.2.2.2.2.2.2.4.4.4.5.5.5.8.8.8.Display FNo.
Correction table for flash measurement
(Autometer IV F and Flashmeter V) Correction of flashpower or working aperture (in f-stops; EV)

Sinar Booster 1

Short-instructions for operating with Minolta Flashmeter III Minolta Flashmeter IV Minolta Autometer IV F Minolta Flashmeter V
1. Move main switch to ON. Set the ASA speed. Move sliding switch to FNo. 2. Move measuring mode selector to AMBI. 3. Place Booster 1 metering probe on the ground glass. Stop down the lens to working aperture. Switch the Booster 1 probe to M (LED lit). Shield ground glass against stray-light. Press measuring button on the Flashmeter lll. 4. Move time-selector on Flashmeter until display shows f5.6. Set the displayed exposure time at the shutter. The number behind 5.6 shows the necessary reduction in 1/10 EV values with determined exposure time. E.g.: 5.6 3. 5. Correction: (example: FNo. 5.6 3) If possible: Move light source or reduce the output by 3/10 EV. Stop down working aperture by 3/10 f-stops. Reduce exposure-time by 1 EV and open working aperture by 7/10 f-stops. 6. Control measurement
Correction by number of flashes and.
. close aperture* or reduce flashpower * (in f-stops) - 0.- 0.3 - 0.- 0.3 - 0.7 - 1.0 - 1.3 - 1.7 - 2.0 - 2.3 - 2.7 - 3.0 - 3.3 - 3.7 - 4.0 - 4.3 - 4.7 - 5.0 - 5.3 - 5.7 - 6.0 - 6.3 - 6.7 - 7.0

Preparation

1. Plug Booster 1 connecting cable into the socket on the left side of the light meter. 2. Switch the light meter on. 3. Select film speed. 4. Connect flash synchro cable. For flash metering: especially suitable is the Sinar Y-Synchro Cable (Ref.-No. 521.51.010) which allows to connect light meter, Sinar/Copal Shutter (Ref.-No. 521.31) and flash generator simultaneously.
Flash readings Flash readings
1. Move main switch to ON. Set the filmspeed. Move sliding switch to FNo. 2. Move measuring mode selector to CORD. Set exposure time: Turn time dial to 1/30 sec. Connect synch cord to Flashmeter. 3. Place Booster 1 metering probe on the ground glass. Stop down the lens to working aperture. Switch the Booster 1 probe to M (LED lit). Shield ground glass against stray-light. Press measuring button on the Flashmeter lll. 4. Based on the difference between indicated f-stop value and f5.6 the flash-output must be changed and/or the flash-lamps be repositioned to obtain a display of 5.(resp. 5.or 5.6 2). 5. Correction: (example: FNo. 5.6 4) Reduce flash output by 4/10 EV, 1 flash. Stop down working aperture by 4/10 f-stops, 1 flash. 6. Control measurement. 1. Move all sliding switches on the left side to upper position. Connect Booster 1 probe cable to the Flashmeter IV. 2. Press RECALL/ON. Set ASA speed. 3. Move measuring mode selector to CORD. 4. Move function selector to TIME and 1/30 sec. Plug synch cord into the Flashmeter. 5. Move function selector to FNo. and select 5.6 with sliding switch. 6. Place Booster 1 metering probe on the ground glass. Shield ground glass against stray-light. Stop down the lens to working aperture. Switch the Booster 1 probe to M (LED lit). Press measuring button in the Flashmeter IV. 7. Read of guide number GV and deviation, e.g.: + 1 GV 5.6 6. 8a. Correction of the GV steps: + X GV: increase flashpower by X steps X GV: reduce flashpower by X steps 8b. Correction of the 1/10 EV steps: Increase the flash output by 4/10 EV, flash once. Reduce flash output by 6/10 EV, flash twice. Close the lens by 6/10 f-stops, flash twice. Open the lens by 4/10 f-stops, flash once. 9. Control measurement.

Remark

There is a support available to attach the Flashmeter III, IV and V and the Autometer IV F on the Sinar cameras (Ref.-No. 462.96.006).
SINAR AG, CH-8245 Feuerthalen/Switzerland Telephone: +41 / Fax: +41 / E-mail:sinar@sinar.ch Website: www.sinarcameras.com Printed in Switzerland, 590.97/01.44.000.2 e - 02.SINAR AG, Switzerland
+ 6.0 + 5.7 + 5.3 + 5.0 + 4.7 + 4.3 + 4.0 + 3.7 + 3.3 + 3.0 + 2.7 + 2.3 + 2.0 + 1.7 + 1.3 + 1.0 + 0.7 + 0.- 0.3 - 0.7 - 1.0 - 1.3 - 1.7 - 2.0 - 2.3 - 2.7 - 3.0 - 3.3 - 3.7 - 4.0 - 4.3 - 4.7 - 5.0 - 5.3 - 5.7 - 6.0 - 6.3 - 6.7 - 7.0
(64) (50) (40) (32) (25) (20) 1 1
* + = means increase flashpower (or open aperture) * - = means reduce flashpower (or close aperture)
(x) = theoretical values, application not realistic

Minolta Autometer IV F

Single point reading ambient light:
1. Set measuring mode to AMBI by using the MODE button and select an approximate correct shutter speed TIME by using the up-down control. 2. Place the measuring window of the Booster 1 on the point to be measured. Stop down the lens to working aperture. Switch the Booster 1 on. Shield focusing screen against straylight. Press the measuring button on the Autometer IV F. 3. Adjust FNo. using the up-down control until it shows 5.6 and the TIME display shows an executable shutter speed. 4. Correction: The figure following 5.6 shows the necessary reduction of light power or working aperture in 1/10 of f-stops (EV). E.g.: 5.= reduce by 4/10 EV. 5. Control measurement. Only as long as the M button is pressed, the display shows the deviation in exposure values (EV) to the average value, expressed in aperture steps (EV). The Info-measurements are only available in the AMBI and CORD modes.

Minolta Flashmeter V

Single point reading ambient light
1. Set measuring mode to AMBI by pressing the MODE button and select an approximate correct shutter speed (TIME) using the thumbwheel. 2. Place the measuring window of the Booster 1 on the point to be measured. Stop down the lens to working aperture. Switch the Booster 1 on. Shield focusing screen against stray-light. Press the measuring button on the Flashmeter V. 3. Adjust the FNo.-value to 5.6 with the smallest possible remaining value (small digit following 5.6) using the thumbwheel. Set the shutter speed as indicated under TIME. 4. The digit following 5.6 shows the still remaining overexposure in 1/10 f-stops, i.e. it indicates by how many tenth the light must be reduced or the aperture must be closed. 5. Control measurement must result in FNo. 5.6 0. be measured and compared with this obtained average value. As long as the measuring button is pressed the display shows the deviation of these points to the obtained average value (expressed in exposure values EV).

Single point reading flashlight:
1. Set measuring mode to CORD by using the MODE button and select the synch speed (as set at shutter) with the up-down control. 2. Place the window of the Booster 1 on the point to be measured. Stop down the lens to working aperture. Switch the Booster 1 on. Shield focusing screen against straylight. Press the measuring button on the Autometer IV F. 3. Correction: Consult the correction table to obtain the necessary correction of flash power and/or working aperture and set the values accordingly. 4. Control measurement
Single point reading flashlight
1. Set measuring mode to FLASH by pressing the MODE button and select the flash sync speed (as set on the shutter) using the thumbwheel. (The FNo.-display can be ignored). 2. Place the measuring window of the Booster 1 on the point to be measured. Stop down the lens to working aperture Switch Booster 1 on. Shield focusing screen against stray-light. Press the measuring button on the Flashmeter V. 3. Look for the displayed FNo.-value in the correction table for flash metering and set the resulting flash power and/or aperture correction accordingly. (The difference between the displayed FNo.-value and 5.corresponds to the necessary correction of flash power and/or aperture). 4. Control measurement must result in FNo. 5.6 0.
Contrast reading ambient light:
1. Set Measuring mode to AMBI by using the MODE button and select an approximate correct shutter speed TIME with the up-down button. 2. Measuring the first point: Place the measuring window of the Booster 1 on the point to be measured. Stop down the lens to working aperture. Switch the Booster 1 on. Shield focusing screen against straylight. Press the measuring button on the Autometer IV F. Store the Measuring value by pressing the button M. 3. Measuring of the second point as described above. Store the measuring value by pressing M. Press button A. The average value is now displayed and the contrast range is shown on the analogue scale. 4. Adjust FNo. using the up-down control until it shows 5.6 and the TIME display shows an executable shutter speed. 5. Correction: The figure following 5.6 shows the necessary reduction of light power aperture in 1/10 of f-stops (EV). 6. Control measurement Info measurement: As soon as the A button is pressed following one or several measurements, additionally selected points can be compared with this obtained average value.
Contrast reading continuous light
1. Set measuring mode to AMBI by pressing the MODE button and select an approximate correct shutter speed (TIME) using the thumbwheel. Contrast metering indicator should not show at this stage (cancel with button if necessary). Clear memory with the M-CLR button if necessary. 2. Place the measuring window of the Booster 1 on the first point to be measured. Stop down the lens to working aperture. Switch Booster 1 on. Shield focusing screen against stray-light. Press the measuring button on the Flashmeter V. Store measuring value by pressing the M button. 3. Measure and store the second metering point as described above. Press and hold the S/A/H button (average value will be displayed) and at the same time press shortly the button (average value will remain on display). 4. Adjust the FNo.-value to 5.6 with the smallest possible remaining value (small digit following 5.6) using the thumbwheel. Set the shutter speed as indicated under TIME. 5. The digit following 5.6 shows the still remaining overexposure 1/10 f-stops, i.e. it indicates by how many tenth the light must be reduced or the aperture must be closed. 6. Control measurement must result in FNo. 5.6 0. Info Metering: As soon as the button is pressed following one or several measurements, additional points can

Contrast reading flashlight:
1. Set measuring mode to CORD by using the MODE button and select the synch speed (as set at shutter) with the up-down control. 2. Measuring the first point: Place the measuring window of the Booster 1 on the first point to be measured. Stop down the lens to working aperture. Switch the Booster 1 on. Shield focusing screen against straylight. Press the measuring button on the Autometer IV F. Store the measuring value by pressing the button M. 3. Measuring of the second point as described above. Store the measuring value by pressing M. Press button A. The average value is now displayed and the contrast range is shown on the analogue scale. 4. Correction: Consult the correction table to obtain the necessary correction of flash power and/or working aperture and set the values accordingly. 5. Control measurement
Contrast reading flashlight
1. Set measuring mode to FLASH by pressing the MODE button and select the flash sync speed (as set on the shutter) using the thumbwheel. (The FNo.-display can be ignored). 2. Place the measuring window of the Booster 1 on the first point to be measured. Stop down the lens to working aperture Switch Booster 1 on. Shield focusing screen against stray-light. Press the measuring button on the Flashmeter V. Store the measuring value by pressing the M button. 3. Measure and store the second metering point as described above. Press and hold the S/A/H button (average value will be displayed) and at the same time press shortly the button (average value will remain on display). 4. Look for the displayed FNo.-value in the correction table for flash metering and set the resulting flash power and/or aperture correction accordingly. (The difference between the displayed FNo.-value and 5.corresponds to the necessary correction of flash power and/or aperture). 5. Control measurement must result in FNo. 5.6 0.