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  • Description

  • The William Optics Adjustable Flat6AIII for FLT91 is a special edition flattener and reducer designed for optimizing the flat-field imaging performance of the William Optics FLT91 refractor, which has an F/6 to F/7.5 ratio.

    Disclaimer

    Specifically designed the William Optics FLT91 refractor.

    Benefits and Features

    Here are some key benefits and features of this adapter:

    • 0.8x reducer
    • 2" Field Flattener
    • M63 threads on the telescope side
    • 2" threads on the opposite side
    • Slot behind the 2" threads to accept an M48 filter
    • Compatible with a variety of camera formats and T-mounts
    • Adjustable to help achieve the proper back focus