Bert Modderman:
celestron c90 air balloon
Bert Modderman:
celestron c90 air balloon
Bert Modderman:
Warsteiner Air Balloon
Bert Modderman:
Moon first quarter, 5 september 2011
Bert Modderman:
Moon shot with Celestron C90
Bert Modderman:
Moon 19 September 2011
Bert Modderman:
air balloon