Leitz sunshade for 35-135mm?

[Roland Zwiers]

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In my collection is a puzzling sunshade of telescopic design.
It has settings marked for 3,5cm/ 5cm/ 9cm and 13,5cm.
Plus engravings for Elmar and Hektor.

See the next slides:

[Roland Zwiers]

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[Roland Zwiers]

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[Roland Zwiers]

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[Roland Zwiers]

The sunshade looks original to me.
And I can readily understand that it combines with the f=9cm Elmar in closed position.
And with a f=13,5cm lens when fully extended.

But how can it be suitable for f=3,5cm and f=5cm lenses as well?
It would cause enormous vignetting!
Is this an engraving error?

Roland

[Kl@usW.]

Roland, I have that kind of sunshade in my collection too, albeit in a better condition. I even used it for some time, it works. 

In my understanding you have to align the lower margin of the upper and outer segment with the engraving. 

So: 

fully extended: 13,5 cm

half way through: 9 cm 

nearly collapsed: 5cm 

fully collapsed:  3,5 cm 

I stopped using this sunshade because of its weight-it´s all brass  and adds considerably to the weight of the set. 

K. 

Edited 25 minutes ago by Kl@usW.