Broken focusknob Swarovski EL, more people having this? (1 Viewer)

[kwikstaart]

A friend from Asia posted his broken focusknob on Facebook. He agreed that I post it here. I know two more birders who had the same and it also happened in warm, humid conditions. Are their more owners familiar with this problemen? Although I am sure swaro will solve this I wonder what could be the problem.

 

[NDhunter]

I've never heard of this before, not common at all.
It could be abuse or not knowing how to adjust the diopter.

 

[John A Roberts]

It's certainly not common, though I've seen two used EL SV’s for sale with the focuser cover missing
(one had a white plastic screw cap as a replacement!).

As can be seen the focuser cover (along with the marked end cap) slides on over the complex underlying mechanism,
though it's not clear how it is retained:




The complexity is necessary to translate the rotation of the focuser knob, to a front and rear motion to move the focusing lenses,
taking into account the very small space in the bridge arms.
(Contrast that to the relative simplicity possible where there is a full length bridge such as with the Leica Ultarvid HD,
as shown in posts #8 and 15 at: Sticky Focus Wheels )

The original EL has 270 components, and while the EL SV's focuser was much simplified, it still has around 170 components.
For more, see posts #49, 52 and 60 at: Binocular Weight, a Triviality?

I’ve also attached a full copy of the EL SV image below.


John