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Ready To Ship Jmi Ev-3n Standard Event Horizon Telescope Focuser - Newtonian Flash Sale: 30% Off [ozDvjxT2]

$43.99 $140.99 -69%

JMI EV-3n Event Horizon Focuser for Newtonian TelescopesIntroducing the JMI EV-3n Standard Event Horizon Telescope Focuser, a masterpiece of engineering and precision designed for Newtonian telescopes. This focuser is crafted for both amateur and pro

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JMI EV-3n Event Horizon Focuser for Newtonian Telescopes

Introducing the JMI EV-3n Standard Event Horizon Telescope Focuser, a masterpiece of engineering and precision designed for Newtonian telescopes. This focuser is crafted for both amateur and professional astronomers, offering a low-profile, friction-drive mechanism that ensures smooth and precise focusing. With a 2.75" square attachment pattern, it easily bolts onto your existing Newtonian reflector, providing a seamless integration. The focuser's Crayford design, known for its high-pressure drive mechanism, eliminates backlash and shifting, ensuring zero image shift and zero backlash. This makes it ideal for both visual observations and photographic work, especially for CCD imaging.
  • Low-profile, friction-drive focuser for Newtonian telescopes
  • Crayford design for zero image shift and zero backlash
  • 2.75" square attachment pattern for easy installation

Key Features and Specifications

The JMI EV-3n Event Horizon Focuser boasts a robust 2" black-anodized aluminum construction with a single-speed drive and knurled aluminum black knobs. It can lift up to 4 pounds, providing ample support for various accessories. The focuser's manual control offers over 1½ times finer adjustments than most rack-and-pinion focusers, ensuring precise focusing. A compression ring in the drawtube holds telescope eyepieces and accessories securely without scratching them. The adjusting screw presses against the ring, tightening around the eyepiece or accessory for a secure fit. The focuser is compatible with Newtonian telescopes and mounts on a range of surfaces from a 7.25" diameter tube to a flat surface, making it versatile for various setups.
  • 2" black-anodized aluminum construction for durability
  • Single-speed drive with knurled aluminum black knobs
  • Supports up to 4 pounds of equipment

Practical Uses and Target Audience

The JMI EV-3n Event Horizon Focuser is an essential tool for astronomers looking to enhance their observing and imaging experiences. Whether you're an amateur enthusiast or a professional observer, this focuser offers the precision and reliability needed for both visual and photographic applications. Its compatibility with various Newtonian telescopes and mounts makes it a versatile choice for a wide range of users. With its ease of installation and exceptional performance, the JMI EV-3n Event Horizon Focuser is perfect for anyone seeking a top-quality focuser for their Newtonian telescope.
  • Ideal for both amateur and professional astronomers
  • Enhances visual and photographic observations
  • Compatible with a range of Newtonian telescopes and mounts

What Our Customers Say

December 31, 2025

Absolutely no complaints!

This is an efficient, no-nonsense product.

- NoNonsense.

December 31, 2025

Absolutely no complaints!

I'm so impressed with this purchase. Five stars!

- David Chen.

December 31, 2025

Absolutely no complaints!

Extremely happy with the results.

- Walter Edwards.

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