Telescope optics shop in Berlin?

[kkokkolis]

We have some German folks here and I thought I could ask. I'm going to Berlin for a Congress, 25-28 September. I would like to know if there is any Telescope Optics shop there. The German vendors are the following (but I don't know the cities they reside)
* Ait
* Apm
* Astro media
* Astro optik
* Astro professional
* Astrocom
* Astrokatalog
* Astrolumina
* Astroshop
* Astroshop.de
* Astro-theke
* Astro-versand
* Baader planetarium
* Burkhads shop
* Bw-optik
* Fernrohrland
* Gerd neumann jr.
* Grab astro tech
* House of Optics
* Intercon spacetec
* Juelich
* Lohmann-optik
* Ma-astro.com
* Meade
* Optical systems
* Optik pro
* Optooffice
* Osdv
* Osim
* Schul teleskop
* Spheretec
* Sterne und planeten
* Tele optic
* Teleskope service
* Vega optics
* Vixen europe
* Vtsb

Thank you!