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  1. Astro-Tech 0.8x reducer/field flattener for f/6 refractors Old Style with 42mm Adapter only.

    Regular Price: $149.95

    Special Price $119.95

    This economical Astro-Tech 2" 0.8x reducer/field flattener is designed for astrophotography with f/6 focal ratio refractors, but will also work well with refractors in the f/5.5 to f/7 range . . .
  2. Astro-Tech 2" x 35mm extension tube

    $29.95
    This Astro-Tech 2" x 35mm extension tube is used to make up for the loss of light path when a 2" star diagonal is removed from many refractor focusers and replaced by a camera and camera adapter for imaging. It can also be used with Astro-Tech Ritchey-Chrétien reflectors to bring webcams and DSLRs to the correct focus . . .
  3. Astro-Tech 2" Extension ring for A-T Ritchey-Chrétien astrographs

    $34.95
    This Astro-Tech 2" long extension ring, installed between your Astro-Tech Ritchey-Chrétien astrograph and its focuser, helps you match the back focus required for your particular complement of imaging components . . .
  4. Astro-Tech 5mm T-thread spacer ring for DSLR and CCD imaging with 42mm Threads

    Regular Price: $9.95

    Special Price $4.95

    This Astro-Tech 5mm T-thread spacer ring can help provide the necessary spacing between a DSLR or CCD camera's focal plane and a reducer, field flattener, or other imaging accessory in prime focus astrophotography.

  5. Astro-Tech AT152EDT .72x Reducer Field Flattener

    $299.00

    The Astro-Tech AT152FF 0.72x focal reducer/field flattener is designed specifically for prime focus astrophotography with the AT152EDT triplet refractor.

  6. Astro-Tech 0.8x reducer/field flattener for Astro-Tech AT115EDT triplet apo refractor Version II

    $199.95
    This economical 0.8x focal reducer and field flattener is designed specifically for astrophotography with the Astro-Tech AT115EDT 115mm f/7 triplet apo refractor. 
  7. Astro-Tech 0.8x reducer/field flattener for Astro-Tech AT125EDL Doublet apo refractor

    $199.95
    This 0.8x focal reducer and field flattener is designed specifically for astrophotography with the Astro-Tech AT125EDL f/7.8 apo refractor.
  8. Astro-Tech 2" Field flattener for imaging with Astro-Tech and TMB refractors

    $149.95
    The Sky & Telescope Hot Product for 2010 Astro-Tech 2" photographic field flattener improves the image sharpness at the corners of the field with Astro-Tech and TMB apo refractors, but will also work well with any other brand of f/6 to f/8 refractor, as well as Astro-Tech Ritchey-Chrétiens . . .
  9. Astro-Tech 0.8x reducer/field flattener for f/6 refractors

    $149.95
    This economical Astro-Tech 2" 0.8x reducer/field flattener is designed for astrophotography with f/6 focal ratio refractors, but will also work well with refractors in the f/5.5 to f/7 range . . .
  10. Astro-Tech 0.8x reducer/field flattener for Astro-Tech AT80EDT triplet apo refractor

    $169.95
    This economical 0.8x focal reducer and field flattener is designed specifically for astrophotography with the Astro-Tech AT80EDT 80mm f/6 triplet apo refractor. 
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