It could be condensation or needs a good clean inside the lens housing - or it could be a trickier issue to resolve. Who knows?.
Sony HVR-Z5E Camcorder - Black - SPARES OR REPAIR
GoPro Hero4 Silver Action Camera LCD Touch for Spares Or Repair
Epson LCD projector EB SO2 H433B Spares or Repair UK
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Sony Handy Cam CCD FX400E Video 8 and Accessories for Spares Or Repair
Sony Video Camcorder DCR-TRV140E PAL For Spares Or Repair In Carry Travel Bag