Any idea what this little piece of mysterious device is?

ziyanglai

I bought a Mamiya RZ67 on eBay and it came in a bag with a lot of accessories. I found this little thing in the front compartment together with a Gossen light meter. I'm assuming that it is something for calculating distance or exposure? But does anyone know what this is or how it works?

It says Germany (West) on both the case and the device itself.

Any help would be appreciated. Thanks.
zylai.com
 

Dr Croubie

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I was thinking 'external rangefinder', but given that it says 'Gossen' and '7.5 degrees' on it, more than likely a spot meter (or attachment for one).
 

AgX

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For Lunasix 3, Lunasix 3S, Lunalite, Lunasix F, Profisix and Mastersix

Switchable between 15° and 7.5°.


Actually your grey version belongs to the Lunasix 3 in its grey outer. But that would be cosmetics only.
Later models of that attachment were black, apt for the later black meters.


Keep in mind to set the appropriate corrective setting at the meter!
 
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aRolleiBrujo

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lucky find!
 

BrianShaw

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"Pro" is US name; "six" is EU name. Same meters.
 

MattKing

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You attach it to the front of the meter, switch it between green (7.5 degree) and red (15 degree ??) Settings and then look down through the top viewer and position the appropriate circle on the part of the subject you want to meter from.

Then take your reading, and read it using the same coloured arrow on the meter.

The real advantage of this, IMHO, is that it permits yu to be certain about what area you are metering from (without requiring a full blown 1 degree spot).
 

MattKing

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BrianShaw

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Interesting; I didn't know about Canada until now. Tnx.
 

aRolleiBrujo

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MattKing

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BrianShaw

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Gossen battery adapter is not cheap but foolproof way of extending the useful life of LunaPro (or LunaSix for ROW).
 

aRolleiBrujo

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wein makes the replacement, they are around $6 US. I'm getting the Gossen LunaSix 3 at around $25 or so! xD
 

MattKing

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aRolleiBrujo said:
wein makes the replacement, they are around $6 US. I'm getting the Gossen LunaSix 3 at around $25 or so! xD
Click to expand...
The Wein cells are one way to approach the problem, but you will need two, and once they are opened they don't last long (so you need to start out with at least 4).

You can use inexpensive hearing aid batteries if you use an appropriate physical adapter. They have the same short life as the Wein cells, but they are closer to 40 cents each. Jon Goodman here on APUG sells one good type of adapter for not a lot more than the price of two Wein cells.

Or the expensive Gossen adapter will give you very long life out of two silver oxide cells.

A Lunasix 3 is fairly old. If it hasn't been recently serviced, I woyld consider quality Light Metrics, who may also be able to adapt the meter to modern batteries.Otherwise, $25.00 is good.
 

aRolleiBrujo

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hmm maybe ill skip it for now until i get the other needed PROP items! xD
 

AgX

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I advocate the Profisix or the Lunasix F:

the most intuitive readings there is, as you "place" the luminances.
No meter knows what it is metering. With other meters you must tell it (corrective factors, film speed) or somehow correct the result (all very clumsy).

Have a look at the above meters.
(they are the same except for the Lunasix F having incorporated flash meter capability but for this lacking the super high sensitivity of the Profisix.)
They are big though (D-battery).
 
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aRolleiBrujo

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One other aspect in my wanting to buy it, was merely the fact that it was made in Germany just like my Pentacon and its Zeiss lens! I miss my Rollei 6008 pro., as well!
 
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ziyanglai

Wow.. Thanks for all the answers in such a short time! This is why I love this community!

The Gossen meter is a Luna Pro F. Doesn't seem like it's working... Will do more research and tests on it tomorrow.
 

MattKing

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The meters recommended by AgX are also made in Germany, as all Gossen meters are (I think).

They take 9 volt batteries, not D cells.
 

aRolleiBrujo

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MattKing

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The Luna Pro F uses a commonly available 9 volt ("transistor") battery.
 

aRolleiBrujo

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I have this one still, but, it is hard for me to understand! I DON'T KNOW ITS CURRENT VALUE, IF ANY, SO, IT IS HERE FOR NOW!

20140804_212236 by a.rodriguezpix, on Flickr
 

AgX

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By turning the dial make the digit match the needle and choose one of the time/aperture pairings at the scale.
 

AgX

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Yes of course 9v batteries, I mixed up designations.

Within the range of these Gossen meters everything is large. The combination of such meter with the Spot-attachment is huge.
I consider this their largest drawback. Seen with standards of today.
 

MartinP

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As everyone has pointed out, the mystery object is a "spot" attachment for the Lunasix 3. If anyone has a grey coloured meter then the factory will no longer service them, and I read that the black ones (the later model) have been orphaned by Gossen during the last few years. Perhaps a newer model will be more future-proof and serviceable for longer.

I had my Lunasix 3 serviced at, coincidentally, almost the last possible moment and was astonished to find that the new calibration-certificate showed less than +/- a tenth of a stop error throughout both ranges -- unnecessarily accurate in fact, as the scale cannot be read with anything close to that precision!
 
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