Another newb question:
On my Sinar P setup, the front standard has a Copal shutter mechanism, which seems to work fine.
When I attach the Symmar 210mm, I have to use this shutter, which I noticed activates the aperture blades in the lens itself. So far so good. Works.

It's when I attach the Scheider 90mm Super Angulon I get confused...
It has a shutter/aperture itself.
So I guess I'm asking what's the preferred method to use? Do you use the lense's shutter or the Copal one? Is there a way to trigger the Lens shutter with the big main cable release?

I've been using the Lense's shutter/aperture, keeping the Copal open. The reason I ask is that I screwed up on my last images, and forgot that the Copal closes automatically if I keep the cable that runs from the film holder bits to the front one attached. Blank sheets.

Am I thinking wrong?