I use my Aptus 22 on an Arca Swiss. The lenses have copal press shutters (the self-cocking ones), which I find very convinient. However, with exposure times longer than 1/2 second I have the problem, that the images turn out almost black, as if the back exposes only for a fraction of the time, or they do have streaks in them. B does not work at all.
I found a very unvonvinient workaround, using two releases: I open the shutter of the lens with a cable release, then I release the back by short-circuiting the cable which should go to the lens. After the required exposure time I close the lens, then the back. That is not very professional for a 15 grand system.
Can the copal press shutters be modified or ajusted so that they work properly? Or do I have to switch to copal shutters?
The back is working fine with a 500 series Hasselblad.
Thanks for answers
gunter