Here is my issue: I use a zwo asi 2600 imaging camera via SGP and then have tried to use an AsI Zwo 220 mini for guiding via ascom on PHd2.  The problem is the PHd2 software reads the pixel size not at 4 but at the size for the 2600 camera.  This occurs when I hook the guider camera to the back of the imaging camera and send that to a router.  If I just cable the guider to the computer directly its not a problem except I engender the extra connection issue.  
If i use a non ZWO product like my old Qhyccd 511 guide camera no problem.  thanks for any advice.
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