[LargeFormat] Measuring square?

[Skip Roessel]

I think they are called cropping frames or cropping els.
Skip

rstein wrote:

> Dear Friends,
>
>      I have been trying to remember what it is called, but it escapes me. I
> mean the measuring device that looks like two L-shaped rulers joined over
> each other with a locking collar that enables you to set an aspect ratio and
> then open and close the rectangle as you frame up a picture.
>
>      I want to buy one to start drawing cropping lines on contact sheets -
> does anyone know what they are called and where they are sold?
>
>      Uncle Dick
>
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