You might test that part at 30 seconds, long enough to time it to some percent. I suspect it will be 100.0%, but 30 is actually 32 seconds.
For the f/stops to hold true, our actual shutter...
I know, I have been MIA for a while!! I have been so busy raising my daughter and working on my photography!!! I am learning so much with so much more to learn!!! I have a project coming up that I...