But a precision spotmeter in the first place!:
But remember it is the eye of the beholder that is the most important tool, combined with the human brains. In this commandcenter the final area will be chosen and defined as middle-gray (Kodak test card).
The SinarSix therefore has a measuring area of only 6mm diameter.And thanks to its exact location in the film plane, the cell precisely covers the same image area at maximum sharpness.
Moreover, oblique rays affect the spot reading cell in exactly the same way as they act on the film.
Thanks to the brightness range indicator and the selective location of the spot reading cell the SinarSix probe and meter can also serve as a densitometer.
The first SinarSix meter had also the Apex system and a Window ro read ASA°
Place the negative on a good lightbox, measure the lowest level and the highest level which must show detail. The difference in stops rersult in a D-value (See table below).
|Stops Difference||Contrast value||D-Value|
|1||1: 2||0.30||2||1: 4||0.60||3||1: 8||0.90||4||1: 16||1.20||5||1: 32||1.50||6||1: 64||1.80||7||1:125||2.10|
Gossen Lunasix special mounted on Sinar measuring cassette.
These are offered regularly on Ebay, if you want one be sure it is the second version, which is much more sensitive and has one lightscale only.
No need to switch between two scales. Also the measuring area is much smaller.!
Same meter Gossen Lunasix special now mounted on Sinar measuring cassette 13x18.
DarkSlide of the SinarSix:
Click Image to enlarge (690x1540): Reading or printing Darkslide of the cassette for short instructions...
Only in german (original)language!
The SinarBooster I fits in the measuring cassette of the SinarSix. If acquired a valuable tool, much easier to measure flashlight with a Minolta Meter. The SinarBooster has a measuring area of only 2.5x3 mm rectangle.And thanks to its exact location in the film plane, the cell precisely covers the same image area at maximum sharpness.
Measuring Window: Seen on the left is the measuring Window of the Sinar Booster I. Clearly marked is the rectangle of 2.5x3mm. Thus covering an area of 7.5mm2
Location Measuring Window: Aligned both, the later SinarSix probe and the Sinar Booster 1
It does not take much imagination to see that the placement of the Booster 1 is more ideal than the placement of the SinarSix probe.
Due to a smaller Silicium cell, the position could be much more to the end of the probe enabling measurememt closer to the borders and in the corners.
Just one button to activate... Move slider from O to M.
This is the Sinar Holder plate for the Minolta series NR: 525.16.005
When attached to the meter, the meter can be mounted on the measureing cassette. It will fit measuring cassettes 4x5 and 5x7 the same way as the original SinarSix.
Provided with the same springs and closing mechanism of the SinarSix and Profisix meters by Gossen.
Sinar Light Meter Cassette 5x7" (13x18 cm) NR:525.17.000
Sinar Light Meter Cassette frame 8x10" (20x25 cm)
Checklist Booster I/Minolta IV
Checklist Booster I/Minolta IV
Metering of Flash:
Readout = Underexposure of 1,6 f-stops
(2-0.4 = 1.6)
|Increase flash output by 1.6 or increase by 2 and close diaphragm by 4/10 = Ideal Exposure.|
On the left is the Sinar Booster 1 mounted on the SinarSix Lightmeter cassette through the adapter shown above.
Item NR: 525.16.005
This meterholder can easily taken off and if neccessary replaced with the original SinarSix meter.
Comparison shot of the two systems. A few more versions were available: SinarSix I, Gossen Profiselekt TTL with booster and SinarBron CLM and FCM meters.
Horseman 4x5" TTL meter, also available in 6x9cm(Type 69).
Note that this meter measures more integral i.e the whole film plane. It helps getting rid of bellows extension and filter compensation, but is not suitable for pinpoint measurements like the Sinar meters.
SinarBron Imaging FCM meter with probe.
Technical the same as the Booster 1, but this one is for the FCM meters.
Minolta and Sekonic offer a booster also, with this booster you have to measure from the GG. Calibration of the GG is neccessary to obtain valuable readings.
Instructions for other Minolta meters: III - IVF -V
Accessories and knowhow on measuring.
|Px 13 PX 625 (2x1.35 V)
Mercury batteries now discontinued. Look here for a solution
|4LR44 - 4SR44 - 4G13 (6V)|
EXPOSURE METERS GALORE:
CD-ROM about exposure meters a.o NorWood Director, WestonMaster, Ranger 9 and Focal plane meters by Sinar, is now available.
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