Here is the sort version:
ST-7XMEI, Class 2 ME chip, no column defects, no guider, $1495.
ST-7XME Standard, Class 2 ME, TC-237H guider, $1995.
ST-7XME Deluxe, Class 1 ME, TC-237H guider, $2495.
ST-9XEI, Class 1 E chip, no guider, $2795.
ST-9XE, Class 1 E chip, TC-237H guider, $3195.
ST-10XE/XME or ST-2000XM with a filter wheel at $500 off the combo price.
A couple of comments about the ST-7XMEI and ST-9XEI. These are single
CCD cameras intended for anyone who already has a guiding solution
such as an STV or another CCD camera. But they are also great TDI
imagers. TDI does not require guiding or an equatorial mount
For more info contact us 800-850-2001
or visit our web site