The current Campag calipers, in common with Tektro (who I'm pretty certain make them, certainly the cheaper ones), Shimano etc have a lever on the caliper which slackens the cable and should allow you to remove the wheel. Tends to depend how portly yer tyres are. If you have fat tyres, the extra release on the brake lever can be handy.
I generally only remove the wheel when the tyre is flat, so it tends not to be an issue.
The current Campag calipers, in common with Tektro (who I'm pretty certain make them, certainly the cheaper ones), Shimano etc have a lever on the caliper which slackens the cable and should allow you to remove the wheel. Tends to depend how portly yer tyres are. If you have fat tyres, the extra release on the brake lever can be handy.
I generally only remove the wheel when the tyre is flat, so it tends not to be an issue.