All that's left are the 180's. No surprises here, considering the Soligor is a $20 lens at flea-markets:
In detail, the Zuiko dissapoints wide-open, but watch it shine when two stops down:
The Soligor shows quite a bit of flare the more it is magnified by teleconverters, and it's not really diminished two stops down.
At ƒ5.6, the Zuiko looks like a Zuiko, but the Solgor still looks like a $20 lens.
Bottom line: I feel vindicated for my years of collecting and using Zuikos. Anyone wanna buy a third-party OM lens? :-)