Hi all! I made an account just to reply to this thread, apologies for resurrecting something so old. I recently picked up a GW690II and encountered the same light streaks. Example:
St. John's Bridge - Fuji Gw690III by
Chris Reinhardt, on Flickr
Because they're highlights. You were using what, 8 to 16 second exposures? Highlights are the only parts bright enough to be recorded on the film while you were winding and before the shutter closed. You're lucky it didn't jam/damage the camera, BTW.
This is close to correct, although i'm not sure it's really operator error, just a quirk of the camera. The GW690 doesn't have a traditional bulb mode, and even the T mode functions slightly differently than in other cameras. Once you press the button the shutter stays open until you do one of two things:
1.) Advance the film lever.
2.) Change the shutter speed.
You can see this
demonstrated in this video.
I'm thinking that when you advance the film the shutter doesn't close quick enough, resulting in the film moving a bit while light is still coming in. It could be this only happens on cameras that need service? Suffice to say, i'll be putting a hat over the lens and changing the shutter speed to end my exposures from now on!
It's also worth noting that the
first in this series of cameras, the Fujica G690 and it's ilk, DO have a traditional bulb mode, along with interchangeable lenses.