>>3012019I'm not sure we're talking about the same camera. I'm referring to the GS645S. Closing the shutter isn't the issue as you can just do that with the main shutter button or a manual release cable attached to it. It's opening the shutter that's the issue. There's no separate 'T' setting on the shutter speed dial, 'T' mode can be activated at any selected shutter speed and is only activated when pressing the recessed button on the side of the lens. Winding the film also will eventually close the shutter, but only after it has advanced nearly an entire frame, but again this is unnecessary as you can close the shutter by pressing the shutter button.