• Explore Scientific 0.8x Focal Reducer — Widen Your Field and Shorten Exposures on f/5 to f/7 Refractors
  • Explore Scientific 0.8x focal reducer side view
  • Explore Scientific 0.8x focal reducer lens element
  • Explore Scientific 0.8x focal reducer with included adapter rings
  • Explore Scientific 0.8x focal reducer retail packaging
  • Nebula astrophoto captured using the Explore Scientific 0.8x focal reducer
  • Deep-sky astrophoto captured using the Explore Scientific 0.8x focal reducer
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Explore Scientific

Explore Scientific 0.8x Focal Reducer — Widen Your Field and Shorten Exposure Times on f/5 to f/7 Refractors

Explore Scientific 0.8x Focal Reducer — Widen Your Field and Shorten Exposure Times on f/5 to f/7 Refractors

$139.99
$139.99
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The Explore Scientific 0.8x Focal Reducer for f/5 to f/7 Refractors shortens your telescope's focal length by 0.8x, widening the field of view and speeding up your optics for shorter exposures — while also flattening the field for pinpoint stars across the frame. It's a favorite astrophotography accessory for capturing larger deep-sky targets faster.

Who it's for

Astrophotographers using f/5 to f/7 refractors who want a wider, faster field for large nebulae and galaxies. New to imaging? See our astrophotography for beginners guide.

Key features

  • 0.8x focal reduction for a wider field and shorter exposures
  • Flattens the field for edge-to-edge sharp stars
  • Matched for f/5 to f/7 refractors
  • Great for large deep-sky targets

Specifications

Type Focal reducer / field flattener
Reduction 0.8×
Matched for f/5 to f/7 refractors
SKU ES-FR0.8x

Frequently asked questions

What does a 0.8x reducer do?
It shortens the focal length to about 80%, giving a wider field and a faster focal ratio (shorter exposures), while flattening the field for sharp corners.

Reducer or flattener?
Choose the 0.8x reducer for a wider, faster field; choose a plain flattener if you want to keep the native focal length and image scale.

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Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
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