For sale is my Starizona Apex reducer/flattener "L" version for focal lengths 500mm and above.
I've been using this with my Skywatcher Evolux 82ED which I've recently parted with, and my ZWO 533MC. It was a great combo taking it from F6.5 to F4.2, but I've downsized to a smaller scope and more travel friendly rig.
Excellent condition asking $575 with express postage included.
With the Apex ED reducer, an f/5.5 apo refractor becomes an incredibly fast f/3.6 astrograph. A slower f/9 telescope like an RC becomes a speedy f/5.9 system. The reduction factor provides a 1.5x wider field of view and shortens exposure times by a factor of 2.4x!
The Apex ED reducer features extra-low disperion glass to eliminate chromatic aberration and to provide sharp star images over a 30mm image circle, capable of working with most popular CCD, CMOS and DSLR cameras up to APS-C format.
The Apex ED reducer fits into a standard 2" focuser. It has M42 T-threads on the camera side, and it can accept a standard 2" (M48) filter on the telescope side for easy use of light-pollution or other filters. On Meade ACF telescopes, the Apex can be attached using a 2" visual back.
For select refractors, we make optional threaded adapters to allow direct threaded attachment of the Apex reducer, eliminating the possibility of tilt introduced by the standard focuser clamp ring.
"L" and "S" Versions
To optimize the Apex ED for the best possible performance, there are two versions of the lens. The "L" version is designed for telescopes with focal lengths 500mm and longer. This includes most larger (100mm+) refractors and all RC and ACF telescopes. The "S" version is for telescopes with focal lengths from 300-500mm, including most 60-80mm apo refractors.
