Historic Amateur Telescopes - The Criterion RV-6 Dynascope

The Criterion RV-6 Dynascope

The Criterion RV-6 Dynascope holds a legendary status in the history of amateur astronomy. Manufactured by Criterion Manufacturing Company in Hartford, Connecticut, from 1958 to the mid-1980s, this 6-inch Newtonian reflector became a gateway telescope for countless stargazers, setting the standard for beginner-friendly instruments. Its affordability, optical quality, and reliable design inspired generations of astronomy enthusiasts and cemented its place in the annals of amateur astronomy.

A Revolutionary Telescope for Its Era

The RV-6 Dynascope was a 6-inch f/8 Newtonian reflector mounted on a German equatorial mount equipped with a clock drive for automatic tracking of celestial objects. This combination was revolutionary at the time, providing amateurs with advanced features at a price point that was accessible to many—under $200 in the late 1950s. Its parabolic primary mirror offered sharp, high-contrast views of planets, the Moon, and deep-sky objects like galaxies and nebulae, making it an exceptional all-purpose telescope.

Criterion’s commitment to craftsmanship ensured that the RV-6 was not only effective but durable. Many examples are still in use today, a testament to the telescope’s build quality. For its users, the RV-6 was often their first window to the cosmos, sparking a passion for astronomy that would last a lifetime.

The RV-6’s Lasting Impact

The Criterion RV-6 Dynascope became the benchmark by which beginner telescopes were judged. It embodied the principle that an affordable, well-made telescope could provide serious astronomical experiences. While Criterion Manufacturing ceased operations in 1985 (being sold to Bushnell, who stopped producing the Dynascope line), the RV-6 remains a coveted item among vintage telescope enthusiasts. Its legacy lives on in modern telescopes that strive to provide a similar combination of affordability, quality, and accessibility.

Modern Equivalents: Explore Scientific Telescopes

Carrying forward the spirit of the RV-6, Explore Scientific offers a range of modern telescopes that are excellent for beginners and casual stargazers. These instruments are designed to be affordable, reliable, and capable of inspiring a love for the night sky.

FirstLight Dobsonian Telescopes

• Explore Scientific FirstLight 8” Dobsonian

The FirstLight Dobsonian series offers exceptional value for beginners. With an 8-inch aperture, this telescope provides bright, detailed views of planets, star clusters, and nebulae. Its simple design makes setup and use straightforward, ideal for those new to astronomy.

• Explore Scientific FirstLight 10” Dobsonian

A 10-inch Dobsonian offers even greater light-gathering ability, perfect for exploring faint galaxies and deep-sky wonders. The FirstLight Dobsonians are excellent for casual stargazing and easy to maintain.

Truss Tube Dobsonians

• Explore Scientific 10” Truss Tube Dobsonian

Designed for portability and performance, this truss tube Dobsonian offers the same large aperture as traditional Dobsonians but can be disassembled for easier transport. It’s perfect for those who attend star parties or need to travel to darker skies.

• Explore Scientific 12” and 16” Truss Tube Dobsonians

For serious amateurs looking to take their observations to the next level, these larger models provide stunning views of deep-sky objects. The truss tube design keeps these telescopes lightweight and portable while delivering professional-level performance. 

Other Explore Scientific Options

• FirstLight 114mm and 130mm Newtonians

Affordable and easy to use, these smaller Newtonian telescopes are ideal for beginners. They are mounted on altazimuth or equatorial mounts and provide sharp views of celestial objects. 

A Telescope for Every Stargazer

Whether you’re an aspiring astronomer or a seasoned observer, telescopes like the Criterion RV-6 Dynascope and modern equivalents from Explore Scientific open doors to the universe. The FirstLight Dobsonian telescopes provide a low-cost, high-performance entry point for beginners, while the Truss Tube Dobsonians cater to more advanced users who need portability and performance. 

These instruments continue the tradition of accessible, quality telescopes that began with telescopes like the Criterion RV-6. They are tools of discovery, igniting a passion for the stars and creating a lifelong bond with the wonders of the cosmos. For those looking to begin their journey, there has never been a better time to explore the universe.