Meade 07568 CCD Framing Eyepiece
Will trade for Meade 9mm Guiding Eyepiece (The one with the Positionable crosshairs)
25mm Plossl illuminated Reticle CCD framing ocular - illuminated rectangular frames show precisely the image size and orientation that appear on CCD chips of most popular CCD cameras.
Because of the relatively small dimensions of the microchips used in CCD imaging systems, composing the astronomical image (i.e., confirming the object's orientation and size relative to the chip orientation and dimensions and centering the object on the chip) can be a challenging issue, particularly in cases of faint diffuse objects. This task is facilitated with the Meade Plössl 25mm Framing Ocular. The Framing Ocularcan be used in either of two ways: (a) by placing it in the telescope's eyepiece-holder, after which the Framing Ocular is replaced with the CCD camera, or (b) in conjunction with a flip-mirror device. The ocular displays in evenly-illuminated red LED light the rectangular frames of all popular CCD chip sizes, including all Meade Pictor Series CCD imagers, as well as the ST-5 through ST-8. A lockable spacer ring fixes eyepiece focus, so that the focus of the eyepiece and the CCD imager can be made precisely parfocal. The Plössl 25mm Framing Ocular includes a 4-element coated optical system with 50° apparent field, foldable rubber eyecup, wireless illuminator with variable illumination control, and internal batteries