[LargeFormat] wollensak lens color coded dots

[Georges Giralt]

Hi !
I've worked a while in a automotive parts company.
The test machine at the end of the manufacturing process put a pair of 
colored dots on the equiment to state the range of values found upon 
testing.
This may explain the varieties of colors on your lenses ;-)

LNphoto a écrit :
> Okay  who can tell me what the dots mean on coated Wolley lenses.   One 
> dot is yellow, I think one is either red or blue.  Some lenses have two 
> dots.  Does this mean Wolley was "multi-coating" lenses 20 years before 
> the Japanese "invented" the process?
> 
> Les

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