Originally posted by ytterbium Am i the only one who thinks that the aperture stops down to full F22 only after exposure? Like the blades were sticky.
Or is it some movement beyond f22, when it starts to close?
No, if you watch closely, the shutter doesn't open until about five seconds AFTER the aperture closes down. Notice how small the slit is. Remember, it says the K10D shutter speed was 1/2000 second. After the aperture closes, you can still see one of the rivets (or whatever) that attach the shutter blades to the actuating arm at the top of the sensor. This is a dead giveaway that the shutter isn't open yet.
A few seconds later, you see both the leading and trailing shutter moving together from top to bottom. It looks like the shutter opening is less than 1/8 inch.
When I first watched it, I thought that the shutter movement I saw was just the trailing shutter, as it closed. But that would mean that the entire sensor was exposed during a 1/2000 second shot, which we all know (from the 1/180 sec flash sync) that this isn't true.