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What is the filter diameter of the Elgeet f : 1.5 / 13 mm C-Mount ?

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I would like to mount on a Elgget f:1.5/13 mm C-Mount, a filter and a hood, but I do not know what is the exact diameter of the thread of the filter mount.


It is between 42 and 43 mm, but it is not 42 or 43 mm.


This is obviously in inches.


Do you know what is the exact diameter in inches ?


In advance, thank you for all informations.



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Well, if you measured it and the result was between 42 and 43mm -

which translates to 1.6535 and 1.6929 and the exact middle of that being 1.6732 -

I think you may easily leave it to chance whether you'll find a 1.66 or a 1.67 filter first.

I cannot really imagine that in the "Elgeet times" there could have been reliable filter

thread measures other than these (that is with two digits behind the 'comma').

Cheers, Phil

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