To see what timeframes in a camera look like I used my old 35mm film SLR camera (Nikkormat FTn). I opened the back, with a standard 50mm lens and with the aperture fully open I set the speed to 1 second and pointed it to a scene.
As I fired the shutter my eye registered the scene. I worked through each the standard camera speed seconds with each exposure getting shorter. While I could register the difference between light and dark at the top speed of 1/000th second, it was at 1/125th where I could not register the image any longer.
To ensure this was a fair test I repeated at this speed on another scene just to prove my brain/eye was not remembering the image. For me it was the 1/60th, 1/125th second mark that I could still see the image.
I also repeated without the lens to see if it made any difference but other than the image being the right way up nothing changed for me regarding the fastest time.
Not that I would think it would have any affect but the Nikkormat has a vertical travel, focal plane shutter rather than horizontal. Regardless of orientation the time between the two shutter blades/curtains should be the same.
The image of this local viewpoint demonstrates well foreground, middle ground and background. Why I find this interesting in that this scene is designed to be looked at in layers.
You look at viewpoint display board for reference and then either view the middle distance or the horizon/background to find the corresponding geographic point. Therefore what I have shown here is not intended to be looked at as a complete image. Then I have stood back from the board and gained elevation by standing on a wall to get the complete vista of all three layers of foreground, middle ground and background. While we were asked to observe each of the individually layers first and then as the complete image what is strange about this panorama is that each of the three distances are completely separate. There is no visual physical connection between each zone. Each one abruptly ends. They are layered in such a way that it almost looks like one layer has been cut pasted and superimposed on the other. The evening low light seems to have accentuated this layering.
What it does not show too well is that the view point board panorama is built up in layers of painted copper to represent the three dimensional distance and strangely does actually represent reality.