Dave finally found and sent me his photos of a California Condor.
Dave figures the Condor was 300-500 feet away.
The photos are pretty large crops of the originals, for the distance I thought they were pretty good considering they were hurried shots.
Dave said that he was taking scenery photos when a woman, who had just been looking at a Condor sign, looks up and yells Condor. Dave turns and quickly begins shooting. Talk about a fortunate set of circumstances, or as Dave claims, blind luck.