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Starizona Apex ED 0.65x Reducer-Flattener - Long Version

SKU : S6-APEXED-L

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  • Designed for APO refractors, but also works with RC and ACF telescopes
  • Corrects for optical curvature and produces pinpoint stars essential for astrophotography
  • This is the "Long" version designed for telescopes with a focal length 500mm and above.

Product Details

  • The Starizona Apex ED reducer transforms an f/5.5 APO refractor into a whopping f/3.6 astrograph! Slower telescopes like those at f/9 can become as low as an f/5.9 system. On top of this, you'll enjoy a 1.5x wider FOV and exposure shortened by more than double the time!

    The Apex ED reducer features extra-low dispersion 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.

    Fitting into a standard 2-inch focuser, the Apex ED reducer has M42 T-threads on the camera side and can accommodate 2-inch (M48) filters on the telescope side for easy customization. You can also attach this to a 2-inch visual back with Meade ACF telescopes especially.

    "L" and "S" Versions

    The Apex ED is available in two versions. 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.

    Backfocus

    The nominal backfocus distance from the Apex ED reducer's T-threads to the image sensor depends slightly on the focal length of the telescope. It is at least 55mm in all configurations. The table below shows the optimum backfocus for various focal lengths. Please contact us for help in choosing the right adapters or spacers necessary for your setup.

     

  • included items

    • Designed for APO refractors, but also works with RC and ACF telescopes
    • Corrects for optical curvature and produces pinpoint stars essential for astrophotography
    • This is the "Long" version designed for telescopes with a focal length 500mm and above.

Product Reviews

Customer Reviews
4.0 Based on 3 Reviews
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S
08/29/2021
Stephan
Canada Canada
Excellent product!!

I used it in conjunction with an Explore Scientific 127mm. It gives excellent stars with an APS-C camera. There is some light fallout but it is taken care with flats very easily! I added an image of a 2 hour stack (calibrated with flats and flat darks). Sopeople can see the whole thing, it is uncropped. The dithering "leftovers" can be observed along the edges. This would be removed from any image in post-processing.

OPT Telescopes Starizona Apex ED 0.65x Reducer-Flattener - Long Version Review
JW
11/30/2020
Jim W.
United States United States
Sharp Stars Bad Vignetting

The stars are sharp in the corners when used with my Sky-Watcher 100mm APO but the vignetting is bad. Difficult to calibrate out.

A
09/23/2020
Anonymous
United States United States
Wider field and faster

I am truly impressed with the Stararizona’s Apex reducer. I am using it with an apo refractor 102mm 714mm focal length, f/7 that became a much faster f/4.55 and FL 464mm. I recommend it for anyone looking a faster scope with wider field. It made perfect, the marriage between my ASI183mm and my 102. Noticeably faster, super exciting.