Lumicon Cassegrin Easy Guider for 7-9" SCT'S

Lumicon Cassegrain Easy-Guider for 7"-9" Schmidt-Cassegrain Telescopes (specify camera brand). The All-in-One Lumicon Cassegrain Easy-Guider is one of the most powerful astrophoto/visual accessories on the market today, greatly extending the visual and photographic capabilities of your 7" to 9" Schmidt-Cassegrain telescope.

You don't have to buy the focal reducing lens separately -- it's included! Competitors force you to buy their guiders and focal reducing lenses separately, costing you more than the All-in-One Lumicon Cassegrain Easy-Guider. The sturdy Cassegrain Easy-Guider incorporates a unique, patented, radial adjustment for off-axis ease of finding bright photographic field guide-stars. The Lumicon Cassegrain Easy-Guider has both radial and rotational adjustments, along with a large off-axis prism that helps make guide-star selection a breeze. The multi-coated 50mm focal reducing lens yields 100% edge-to-edge field illumination, plus high-contrast, pinpoint star images across a 35mm film frame.

In addition, not only is the Lumicon Cassegrain Easy-Guider a superb off-axis guider, it is also an excellent visual focal reducing lens system. With the 50mm lens in the standard position behind the off-axis prism (on the camera side of the guider), photographic speed is about f/6.5. The fully-coated lens can also be moved to a position in front of the prism (on the telescope side of the guider), yielding an approximate f/5 ratio. Exposure durations with the Lumicon Cassegrain Easy-Guider are thus 2 to 4 times shorter, and the visual field-of-view is increased.

The filter compartment is located behind the pick-off prism on the camera side of the Cassegrain Easy-Guider, allowing you to guide off-axis with UNFILTERED starlight; only the camera's starlight is filtered -- a real bonus! All other off-axis guiders on the market have pick-off prisms only a fraction of the size of Lumicon's Cassegrain Easy-Guider, and they require that the focal reducing lens AND filter be mounted AHEAD of the guider. This greatly dims fainter guide-stars, making guiding on them all but impossible.