Weston Master II

Discussion in 'Exposure Discussion' started by Chan Tran, Mar 20, 2010.

  1. Chan Tran

    Chan Tran Member

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    I have a Weston Master II exposure meter. I got it at a garage sale many years ago and never used it. Recently, out of curiousity I checked it to see how accurate it is. I found that the direct reading in Candela per foot squared is quite accurate but the dial would indicate wrong exposure.
    For example, 400 c/ft^2 which is EV15 for ISO100 but dial this value in the built in dial I would get 1/130@f/20 which is EV15 and 2/3. Using Weston rated speed of 80 for ISO100 I would get 1/130@f/18 which is EV15 and 1/3.
    It seems to get the correct exposure setting I would have to set the dial for ISO64 instead.
     
  2. Denis P.

    Denis P. Member

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    Older Weston light meters used different speed ratings. The general formula states that Weston 80 equals 100 ASA/ISO. So, you're right that you should set the film speed dial to 80 (or even 64, as you say).
    Check also here: Weston meter
     
  3. Galah

    Galah Member

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    Amazing how these old Weston Masters continue to work so well ! :smile:
     
  4. benjiboy

    benjiboy Subscriber

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    I think the Weston 11 master meter came out in 1948, after around sixty years it's a miracle they work at all never mind accurately ,
     
  5. Steve Smith

    Steve Smith Subscriber

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    The miracle could be that they have had the cell replaced. A service which Megatron in the UK still offer.


    Steve.
     
  6. benjiboy

    benjiboy Subscriber

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    They may still do it Steve but there's no mention of it on their website now http://www.megatron.co.uk/homepage.html
     
  7. edp

    edp Member

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    They did my Master V in October 2008, and I don't think their website mentioned it then either.
     
  8. ic-racer

    ic-racer Member

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    I'd do a Zone I test on an old meter anyway, and use the results of that test for my exposures.
     
  9. Galah

    Galah Member

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    I have a W-M II and a V (neither has been "serviced"): both work well. :smile:

    I have several other "built in" selenium meters in various cameras: all work OK.
     
  10. Chan Tran

    Chan Tran Member

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    I bought mine at garage sale so I can't be sure but I believe it has not been recelled.
     
  11. Steve Smith

    Steve Smith Subscriber

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    You are right. It doesn't mention it any more. I think it used to be on the Euromaster II page at the bottom. They offered calibration and/or cell replacement.

    I definitely saw it about a year ago. It did take a bit of searching for though.


    Steve.
     
  12. MartinCrabtree

    MartinCrabtree Member

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    He repairs them.Shipping may be a bit stiff but the price for an overhaul isn't bad.
     
  13. Galah

    Galah Member

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    Hi all,

    Over the week end, I bought a second Weston Master II Universal Exposure Meter (Model s141/7350) black body with a white scale , manufactured in England, exactly like the one I have had already for about a year.

    This one came in the original box, a leather eveready case and a lanyard, and the original instruction booklet.

    What I found interesting was that both copies of the meter give identical readings in the same conditions: that must be good? :smile:

    Alright then, my question is: is this model meant to have an invercone (so it can do "incidental light" readings) or not?

    A very careful reading of the instruction booklet and the illustrations therein seems to suggest -strongly- that this model was never meant to be used for "incidental" reading, only for reflected light readings (and, therefore, was never meant to be used with an invercone).

    Is there anyone who can confirm this, please???
     
    Last edited by a moderator: Mar 30, 2010
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  15. Steve Smith

    Steve Smith Subscriber

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    Mine has both an invercone and an ND filter which fits in place before the invercone. The invercone from the later Weston IV and V meters do not fit.

    http://www.urmonas.net/manuals/westonII/westonII.html

    EDIT: I was hoping that link to a manual would include instructions on the invercone and filter but it doesn't!

    I think the idea is that in order to fit the invercone the door is opened which sets the meter to its low light range. The filter compensates for having the door open and also pushes the scale back to the high range. Without the filter it works normally on the low light range.


    Steve.
     
    Last edited by a moderator: Mar 30, 2010
  16. benjiboy

    benjiboy Subscriber

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    The invercone fitted to the later Weston meters like the Master 1V, V, and Euro Master that is bigger than the meters body and allows the light to back leak in backlit situations and because of it's cardioid shape IMHO is the best incidental light meter ever, I've been using it for more than thirty years, and although I have a Gossen Luna-pro SBC ( Profisix), a Gossen Digipro, and a Sekonic L-358 the Weston purely for incidental light readings in normal daylight is the best of the lot, Jack Dunn who invented it in the 1950s was a genius.
     
    Last edited by a moderator: Mar 30, 2010
  17. Chan Tran

    Chan Tran Member

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    I have the manual for my Weston Master II (unfortunately the manual is in much better shape than the meter) and it does say that you can use an invercone with the Master II.
     
  18. Galah

    Galah Member

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    My manual doesn't mention any invercone whatever and makes no reference to incident light measurement at all, only to reflected light readings. :confused:

    No invercone was provided and no mention of such an accessory is made in the manual:confused: (unlike in my WM-V manual).
     
  19. Galah

    Galah Member

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    Well, Steve, if you open to page one, in the link you provided, it states:

    "Brightness

    Your exposure meter is designed to measure reflected light or brightness and not incident light...."


    So, it pretty well appears to eliminate the use of invercones etc and all that goes with it?

    Yet, people still claim that the WM II can be used to/is designed to read incident light.:confused:

    are they simply incorrect?:confused:

    I know later models (e.g, the WM V) are actually clearly designed to read both incident and reflected light, but the WM II ?:confused:
     
  20. Steve Smith

    Steve Smith Subscriber

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    You are correct. My meter has an invercone and an ND filter. However, it's a III not a II like I thought it was!!!


    Steve.
     
  21. benjiboy

    benjiboy Subscriber

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  22. Steve Smith

    Steve Smith Subscriber

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    ... and mine for the III looks just like that. This page: http://westonmeter.org.uk/westonthree.htm shows the ND filter I mentioned.

    And on the home page:

    Steve.
     
  23. erikg

    erikg Member

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    The Invercone converts the meter for use as an incident light meter, this will be true for the Master II as it is for all following Masters. My guess is that early manual was not written with the Invercone in mind, perhaps it had yet to be added as an option.
    Quality Light Metric in Hollywood still works on these meters, and the price and turn around are very reasonable, exceptional even.
     
  24. Galah

    Galah Member

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    OK, thanks everyone. This seems to clear it up :smile:
     
  25. Galah

    Galah Member

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    Thanks for the link: this really clears it up. :smile:
     
  26. RMD

    RMD Member

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    With reference to the mention of Megatron in this thread,this company has recently ceased operation.
    A company called Optical Test and Calibration (OTC) has taken over some of the maintenance side of the industrial business,but there is no mention of repairs to Weston meters.