I spent a little time on Saturday tracing down a suspected challenge with one of my new lenses. I had picked up a barrel optic and screwed it into a #0 Seiko shutter. My first images left me to thinking there might be something wrong.
The Seiko (for those not familiar with it) throws its cocking lever rather hard when the shutter is tripped. I was concerned that this might be a source of my perceived resolution challenges.
I tried the optics in both the Seiko and Copal shutters and took a close look at the resolution on-negative. There is no difference between. So I'm comfortable now with the Seiko and it's "flying arm". :-)
And the lens? Its sharp. I don't know what I was worked into a lather about...