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The starlight xpress ccds are the only self guiding single chip ccds that I am aware of. Sbigs range has an additional ccd built is (as do the sbig clones).
In this modern age, true autoguiding can be done in software, such as ACP controlling Maxim so any camera setup will usually suffice, but in the case of the Atik, you will either use the camera as the main camera or as the guider, not both.
Note that off axis guiding is a means of 'extracting' part of what the telescope sees and making it available for a second camera or ccd chip.
Cheers
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