Meade 25mm Plossl Wireless Illuminated Reticle CCD Framing Ocular Eyepiece (1.25") with 50-Degree Apparent Field of View

Due to the relatively small dimensions of the microchips used in CCD imaging systems, composing the astronomical image(confirming the object's orientation and size relative to the chip orientation and dimensions & 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 Plossl 25mm Framing Ocular.

The framing ocular can be used either by placing it in the telescope's eyepiece holder, after which the ocular is replaced with the CCD camera, or in conjunction with a flip-mirror device.  The ocular displays the rectangular frames of all popular CCD chip sizes.  A lockable spacer ring fixes the eyepiece focus, so that the focus of the eyepiece and the CCD imager can be made precisely parfocal.