• DayStar Imaging focal reducer FR2DT 0.5x 0.33x – 2-inch to T mount with 20mm extension tube for beginner solar imaging and astrophotography
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Daystar

DayStar Imaging Focal Reducer 0.5× / 0.33× — Widen Your Solar Imaging Field with 2-Inch to T-Mount Connection

DayStar Imaging Focal Reducer 0.5× / 0.33× — Widen Your Solar Imaging Field with 2-Inch to T-Mount Connection

$285.00
$285.00
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The DayStar Imaging Focal Reducer (FR2DT) widens your field of view for solar astrophotography. It takes a 2-inch input and outputs to standard T-thread, shortening effective focal length by 0.5× or 0.33× so you can fit the full solar disk and sweeping prominences onto your camera sensor. A 20mm extension tube is included to help you reach the correct spacing. Ships free to the US.

Who it's for
Solar imagers who want wider-field views of the whole Sun with a Quark or other solar filter setup. New to imaging? See our beginner's guide to astrophotography.

  • Wider solar field: reduces focal length to capture the full disk and prominences in one frame.
  • Two reduction factors: configurable 0.5× or 0.33× depending on spacing.
  • 2-inch to T-thread: 2" input, T2/M42×0.75 output for standard camera trains.
  • Extension tube included: 20mm spacer helps dial in the correct back-focus.
Specifications
Input 2" barrel
Output T-thread (T2 / M42×0.75)
Reduction Factors 0.5× or 0.33× (configuration dependent)
Model / SKU FR2DT
What's in the Box Focal reducer, 20mm extension tube

What does a focal reducer do?
It shortens the effective focal length, giving a wider field of view and a brighter image — useful for capturing the whole solar disk.

How do I get 0.5× vs 0.33×?
The reduction factor depends on the spacing between the reducer and your sensor; the included extension tube helps you set it.

Will it fit my camera?
It outputs standard T-thread, so any camera with a T2/M42 adapter will connect.

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Frequently Asked Questions

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