Stellarvue 0.8X Reducer Flattener for SV115 Refractors with 2" Focusers

  • Sale
  • Regular price $195.00
  • Stellarvue 0.8X Reducer Flattener for SV115 Refractors with 2" Focusers

    • Sale
    • Regular price $195.00
    • ITEM #



    Stellarvue 0.8X Reducer Flattener for SV115 Refractors with 2" Focusers

    Stellarvue 2’????????? 0.8X Reducer Field Flattener
    for SV115 Refractors with a 2’????????? Focuser

    The Stellarvue SFFR115-2 Reducer Flattener is optimized for use with Stellarvue 115 mm refractors that came with a standard 2" focuser. The SV Reducer Flattener slips into the 2" focuser and is snugged into place with the focuser’?????????s set screws. A 48 mm filter thread is machined into the reducer flattener, allowing you to add standard 2’????????? filters when desired. The focal reduction of the SFFR115-2 is 0.8X, which converts your f/7 refractor to f/5.6.

    The backfocus of the Stellarvue 2’????????? Reducer Flattener for SV115 Refractors is 55 mm. Since a DSLR with t-ring has a 55 mm backfocus, it is a simple matter to use the reducer/flattener for DSLR imaging. Just insert the reducer/flattener into the telescope’?????????s focuser and then thread the camera/t-ring combo onto the flattener. An example is shown in the additional images section to the left.

    If you will be imaging with a CCD camera as opposed to a DSLR, extension tubes may be required to achieve focus. It is important that you know the distance between your camera’?????????s t-thread and the sensor, and it is equally important to remember that the distance from the back of the field flattener/reducer to the CCD sensor remains at 55 mm. If the CCD camera, for instance has a backfocus of only 35 mm, a 20 mm extension will be needed. If any extension tubes are required for your set-up, they will thread between the camera and the field flattener, as shown in the example provided in additional images. Please note that the camera side of the reducer/flattener requires extension rings with a standard t-thread (M42x.75).

    Additional Information


    Questions & Answers

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    • Will this reducer/flattener work with an Explore Scientific ED102 f/7 (714mm focal length) refractor?

      It will be able to focus, and while the field will likely not be quite as flat as on an SV115, it will likely be acceptably flat over an APS-C size field.

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