I think this is the part I want
[david bogie] “the viewfinder goes black, the shutter opens and closes in two steps using two separate shutter curtains”
The idea is to see the scene as if the viewer is the one taking the picture, it’s been a long long time since I taken a picture in an SLR camera, and in addition it’s a very fast movement I didn’t get to grasp.
Thanks for the explanation.
And Steve, thanks for the link.
Elad