Watameter – What the?

Scale focus cameras can be fun.  There is no precise focusing, you pre-set focus points in advance, allowing a quick “draw” approach, and the viewfinder is very uncluttered.  They are also generally cheap, so a very easy way to get into film photography.  There is occasion though, where some precise focusing would be helpful, which is where accessories like the Watameter come in.

The Watameter is an accessory rangefinder giving you the ability to determine the distance to your subject, which you then apply to your scale focus camera and in theory gives you precise focusing ability.

I enjoy using old folding cameras (folders), like the great range of Agfa Isolettes or the Voigtländer Perkeo.   These can have a great lens, but are limited in the ability for the user to estimate the distance to the subject.  I wanted something that could help in those occasions where I wanted to use an open aperture, and for a few dollars found this Watameter which I had delivered from the Czech Republic.  Mine is metric as I think in metres.


Unlike when I research cameras or lenses, I could not find much on the Watameter, which is surprising as there are quite a few of them around.  I did find an article and some advertising from Popular Photography in the U.S. dated from December 1950, specifically for the Watameter II.   Mine is a Watameter I, which was released at the same time.

What I have deduced is that in that period of the late 40s and 50s, the Wata company was from Germany and produced several different accessories, including the Watapress, an accessory flash unit.


The Watameter I is a rangefinder accessory which attaches to the accessory shoe of a camera.  There are two variants, one like mine in metric, and the other in imperial.

It works by superimposing two images, one in a yellow rectangle, in the viewfinder.  You adjust the wheel on the right side of the meter until the two images line up.  The distance is then taken from the wheel.  Of-course you then need to manually change the lens to match the same distance to ensure the right focus point.  It covers 55cm to infinity.

There are two adjustments on the meter.  The distance calibration can be adjusted with the smaller wheel inside the distance wheel on the right side.  This should be done every so often to ensure you are in fact getting the correct distance.

The other adjustment aligns the vertical part of the image.  That is adjusted with a small wheel on the left of the meter.  While this does not affect the distance measurements, it does make it easier to align the images.

The Experience

There is not much in terms of using this rangefinder.  Peering through the viewfinder I found it to be a bit small but very usable.  The yellow patch is very nice and clear, especially for its age.  The wheel moves around quite easily but is tight enough to zero in on the superimposed image to achieve alignment.  The numbers are printed nice and clear on the wheel so that you determine the distance.

I slotted it onto the top of a few cameras.  What I did find is that it was great on top of most of them, very easy to move up and down between the Watameter and the camera’s viewfinder.  There was one little complication though, as in the Agfa pictured in this article.  It got into the way of the button to release the lens from the folded position.  It also partly blocked the shutter button, but I could get to both buttons with a little effort.

Apart from the little niggle with the buttons, it worked very well and I found it quite useful.  It did help me determine the focus for the shallower apertures which are harder on a scale focus camera.  It also came with a nice leather pouch, perfect for storing it.  If you find that you can use some help determining distance on a viewfinder camera, and considering how cheap these can be found, it is definitely worth investing in a Watameter.


  • john April 30, 2018 at 9:32 am

    Thanks for this info. I was thinking of getting one that i found here in paris for 7 euros. The one that i saw only shows between 30 and 50 cm. Im imagining the dial can be turned around and on the other side markings between 55cm and infinity will be shown. Am I right?

    thanks again!

    • Theo April 30, 2018 at 3:36 pm

      The one you are seeing must be a different model, as this one focuses from 55cm to 12m and infinity. Closest is only 55cm, so the one you have seen might be a specialised model for macro/close up photography.

    • Theo April 30, 2018 at 3:42 pm

      Just had a look, you might be looking at the Watameter Super which does have a dual scale. This would be a very good buy for 7 euros!

    • der_fotograf September 22, 2018 at 5:56 am

      This is the Watameter II, which allows you to read the distance in the viewfinder up to 1 meter, and shorter distances off the wheel indicator.

      • Theo September 22, 2018 at 5:17 pm


    • Peter Gregefalk August 18, 2020 at 10:57 am

      The outer wheel of the Watameter Super, is made for macro. The distace settings for normal shooting is read from the eyepiece.

  • Werra 2 – Oh Carl, Werra art thou? – Photo Thinking June 1, 2018 at 12:06 pm

    […] altogether.  Unfortunately it does not have an accessory shoe, so I could not even attach the Watameter.  The focus is smooth and it has a medium throw, easily set to appropriate distance. I could only […]

  • der_fotograf September 22, 2018 at 6:01 am

    BTW, I am using a MEDIS rangefinder and a Präzisa rangefinder for my small full frame cameras:

    • Theo September 22, 2018 at 5:20 pm

      Those are nice rangefinders!

  • John Redmond May 11, 2019 at 2:51 am

    Thanks for this info.
    I just acquired a boxed one which has WI on the small wheel-using you instructions I tuned it in and it is uncannily accurate-Thanks.

    • Theo May 11, 2019 at 12:25 pm

      You’re very welcome! I’m glad it was a help. They are a great little accessory, especially if you like older viewfinder cameras.

  • Peter Gregefalk August 20, 2020 at 2:04 am

    I just got my Watameter today (Aug 19 – 2020)
    I have a problem. It doesn’t give me an accurate metering. According to the manual, there is supposed to be an Adjusting Screw (11) at the center of the External Wheel (3). Mine does have the external wheel. But at it’s center there is no adjusting screw. Anybody knows how to adjust the Watameter if there is no such adjusting screw?
    I have pictures to further explain my problem. But no way to ad them here, as far as I can see. But I think the description will do.


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