Thanks Raymo,
The more I research this, and play with the scope, the more I believe it was atmospheric. Venus would have only been up to 15-20 degrees, just before sunrise. I am now suspecting that played a significant role. I'll be checking this tonight after the day cools down to see what kind of contrast I can get on some other stars. Unfortunate time of the year for a newbie to be trying to validate his set-up, no close targets at a reasonable altitude and time of day.
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