JMI Telescope Focusers

The Event Horizon Focuser is a low-profile, friction-drive focuser designed for both the amateur and professional market. The highly acclaimed Crayford design permits tolerances up to 100 times better than conventional rack-and-pinion focusers. Zero image shift and zero backlash makes it fantastic for visual and photographic work and a must for CCD imaging. The modular design makes changes and upgrades extremely easy to accomplish. Add the optional variable-speed Motor and Smart Focus or Digital Readout (DRO) for the ultimate focusing system. The EV is truly a masterpiece of engineering and workmanship that you will be proud to own for years to come.

One of the EV focuser modular bases is designed for Schmidt-Cassegrain telescopes. These telescopes achieve focus by moving the primary mirror. This design tends to create image shift which is especially problematic for CCD imaging. The EV Cassegrain focusers achieve focus by moving the eyepiece, camera or other equipment at the back of the telescope instead of the mirror.

JMI Event Horizon EV-2

The Event Horizon EV-2 is a 2 inch black-anodized aluminum focuser with rubber grip knobs. The focuser lifts up to 8 pounds. Manual control is over 1½ times finer than most rack-and-pinion focusers.

From: $249.00

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JMI Event Horizon EV-3

The JMI Event Horizon EV-3 is a 2 inch black-anodized aluminum focuser with knurled knobs. The focuser lifts up to 4 pounds. Manual control is over 1½ times finer than most rack-and-pinion focusers.

From: $189.00

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