Blurred image with HD webcam - despite good intern...

I have a Logitech HD Pro webcam C920, but the image is blurred at the reciever.
My own image I can see on my computer is fine, and the contact's image is ok, but the reciever tells me, that the image is blurred - meaning not sharp.
The reciever is a professional and have really high tech equipment, so the problem is not there.
My internet speed is 21 mbps download and 2,1 upload. When I call one of my own computers to check the quality it looks fine, but the reciever in Denmark (I'm calling from US) tells me the image is blurred.
I've installed the latest driver. I have professional lighting. The processor and RAM at my computer is more than required by the Logitech requirements. I use high-speed USB port.
The camera is on auto-fokus.
So I'm beginning to get frustrated. Is there a setting I'm missing?
Thanks.

Have you tried to make a video call to another contact?
2 mbps upload speed is not much for HD quality with Logitech c920 webcam. My own experience with this webcam is that you need at least 5 mbps upload speed. With 2 mbps you can not expect better resolution than 640x360.
Next time you are on a call, open the Call menu and select Call Technical Info. Watch the actual download/upload speed and your video resolution. Be aware that bandwidth speed in Call Technical Info is in kB/s (kiloBytes per second), so you need to multiply it by 8 in order to compare with your Internet connection speed (1 kiloByte= 8 kilobits)

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Oh, I guess I must first point out that I have calibrated my Monitor and Printer, using ColorVision's Spyder2Pro for the monitor and their PrintFIX Pro for the printer. It looks pretty good. But here is the problem.
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