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Explore Scientific

Explore Scientific 3" Dielectric-Coated Diagonal Mirror – DD03-01CF

Explore Scientific 3" Dielectric-Coated Diagonal Mirror – DD03-01CF

$589.99
$589.99
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The Explore Scientific 3" Dielectric-Coated Diagonal Mirror (DD03-01CF) is a high-performance optical accessory designed for telescopes with large focusers that require maximum light transmission and wide-field capability. Its dielectric-coated mirror provides up to 99% reflectivity, ensuring bright, sharp, high-contrast images across the field of view—ideal for deep-sky, planetary, and wide-angle observing.

Engineered with a precision double-tapered insert barrel, this 3" diagonal delivers secure seating in the focuser and smooth, reliable handling. The included 2" adapter expands compatibility with a wide range of eyepieces. Compression ring locks on both the 3" and 2" holders secure accessories without marring barrels. Dust covers protect the optical surfaces when not in use. This diagonal is built for observers who demand top-tier optical performance and mechanical stability for large-format telescope setups.

Features

  • 3" dielectric-coated mirror with up to 99% reflectivity

  • Supports wide-field eyepieces without vignetting

  • Double-tapered insert barrel for secure, slip-resistant mounting

  • Includes 2" adapter for expanded eyepiece compatibility

  • Compression ring locks on both 3" and 2" holders

  • High-contrast viewing for deep-sky, lunar, and planetary targets

  • Durable optical housing with protective dust covers

Specifications

Specification Details
Model/SKU DD03-01CF
Type 3" Dielectric-Coated Diagonal Mirror
Reflectivity 99% dielectric coating
Barrel Size 3" (76.2 mm)
Adapter 2" adapter included
Insert Barrel Double-taper tapered design
Locks Compression ring locks
Weight Approx. 2.0 lb (0.90 kg)
Length Approx. 104.8 mm
Width Approx. 60.9 mm
Height Approx. 127 mm
Included Accessories 2" adapter, dust covers
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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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All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
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