4" f/9 Apochromatic Pro level performance; highly portable. Stellar images; textbook quality diffraction patterns. Near 3-dimensional deep space objects, against extremely dark-sky backdrop, with unobstructed optical system. Nebulas stand out in detail. Extremely stable LXD650 equatorial mount. Great for astrophotgraphy, CCD imaging, visual observing. Can use optional 1664 Electronic Drive, or 1697-650 Computer Drive, in place of standard DC Servo drives. Available Complete with Mount, Tripod & Accessories, or with Optical tubes (OTA) & Mounts purchased separately.