The Event Horizon Focuser (EV) is a low-profile, friction-drive focuser designed for both the amateur and professional market.  The highly acclaimed Crayford design (see below) 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. 


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Product Image Price Item Name+

JMI EV-1 Telescope Focuser (Refractor with motor) $546.00

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JMI EV-1 Telescope Focuser (Refractor with motor)

JMI EV-1 Telescope Focuser  (Refractor with motor) The Event Horizon EV-1 is a 2" black-anodized aluminum focuser with rubber grip knobs and two-speed operation.  The focuser lifts up to 8 pounds.  Dual-speed manual controls are over 15 times...

JMI EV-1 Telescope Focuser (Refractor) $395.00

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JMI EV-1 Telescope Focuser (Refractor)

JMI EV-1 Telescope Focuser  (Refractor) The Event Horizon EV-1 is a 2" black-anodized aluminum focuser with rubber grip knobs and two-speed operation.  The focuser lifts up to 8 pounds.  Dual-speed manual controls are over 15 times finer (small...

JMI EV-1 Telescope Focuser (Cassegrain with Motor) $480.00

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JMI EV-1 Telescope Focuser (Cassegrain with Motor)

JMI EV-1 Telescope Focuser (Cassegrain with Motor) The Event Horizon EV-1 is a 2" black-anodized aluminum focuser with rubber grip knobs and two-speed operation.  The focuser lifts up to 8 pounds.  Dual-speed manual controls are over 15 times...

JMI EV-1 Telescope Focuser (Cassegrain) $349.00

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JMI EV-1 Telescope Focuser (Cassegrain)

JMI EV-1 Telescope Focuser The Event Horizon EV-1 is a 2" black-anodized aluminum focuser with rubber grip knobs and two-speed operation.  The focuser lifts up to 8 pounds.  Dual-speed manual controls are over 15 times finer (small outer knob)...

JMI EV-1 Telescope Focuser (Newtonian with Motor) $489.00

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JMI EV-1 Telescope Focuser (Newtonian with Motor)

JMI EV-1 Telescope Focuser (Newtonian with Motor) The Event Horizon EV-1 is a 2" black-anodized aluminum focuser with rubber grip knobs and two-speed operation.  The focuser lifts up to 8 pounds.  Dual-speed manual controls are over 15 times...

JMI EV-1 Telescope Focuser (Newtonian) $338.00

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JMI EV-1 Telescope Focuser (Newtonian)

JMI EV-1 Telescope Focuser The Event Horizon EV-1 is a 2" black-anodized aluminum focuser with rubber grip knobs and two-speed operation.  The focuser lifts up to 8 pounds.  Dual-speed manual controls are over 15 times finer (small outer knob)...

JMI EV-2 Telescope Focuser (Cassegrain with motor) $395.00

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JMI EV-2 Telescope Focuser (Cassegrain with motor)

JMI EV-2 Telescope Focuser (Cassegrain with motor) The Event Horizon EV-2 is a 2" 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...

JMI EV-2 Telescope Focuser (Cassegrain) $244.00

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JMI EV-2 Telescope Focuser (Cassegrain)

JMI EV-2 Telescope Focuser  (Cassegrain) The Event Horizon EV-2 is a 2" 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. The...

JMI EV-2 Telescope Focuser (Newtonian with motor) $404.00

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JMI EV-2 Telescope Focuser (Newtonian with motor)

JMI EV-2 Telescope Focuser (Newtonian with motor) The Event Horizon EV-2 is a 2" 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...

JMI EV-2 Telescope Focuser (Newtonian) $253.00

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JMI EV-2 Telescope Focuser (Newtonian)

JMI EV-2 Telescope Focuser (Newtonian) The Event Horizon EV-2 is a 2" 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. The...

JMI EV-2 Telescope Focuser (Refractor with motor) $461.00

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JMI EV-2 Telescope Focuser (Refractor with motor)

JMI EV-2 Telescope Focuser (Refractor with motor) The Event Horizon EV-2 is a 2" 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...

JMI EV-2 Telescope Focuser (Refractor) $310.00

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JMI EV-2 Telescope Focuser (Refractor)

JMI EV-2 Telescope Focuser (Refractor) The Event Horizon EV-2 is a 2" 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. The...

JMI EV-3 Telescope Focuser (Cassegrain with motor) $338.00

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JMI EV-3 Telescope Focuser (Cassegrain with motor)

JMI EV-3 Telescope Focuser (Cassegrain with motor) The Event Horizon EV-3 is a 2" 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....

JMI EV-3 Telescope Focuser (Cassegrain) $187.00

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JMI EV-3 Telescope Focuser (Cassegrain)

JMI EV-3 Telescope Focuser (Cassegrain) The Event Horizon EV-3 is a 2" 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. The...

JMI EV-3 Telescope Focuser (Newtonian with motor) $348.00

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JMI EV-3 Telescope Focuser (Newtonian with motor)

JMI EV-3 Telescope Focuser (Newtonian with motor) The Event Horizon EV-3 is a 2" 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....

JMI EV-3 Telescope Focuser (Newtonian) $197.00

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JMI EV-3 Telescope Focuser (Newtonian)

JMI EV-3 Telescope Focuser (Newtonian) The Event Horizon EV-3 is a 2" 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. The...

JMI EV-3 Telescope Focuser (Refractor with motor) $404.00

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JMI EV-3 Telescope Focuser (Refractor with motor)

JMI EV-3 Telescope Focuser (Refractor with motor) The Event Horizon EV-3 is a 2" 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....

JMI EV-3 Telescope Focuser (Refractor) $253.00

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JMI EV-3 Telescope Focuser (Refractor)

JMI EV-3 Telescope Focuser (Refractor) The Event Horizon EV-3 is a 2" 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. The...

JMI EV-75 Upgrade for Meade LXD55/75 SN-6 / SN-8 / SN-10 $83.00

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JMI EV-75 Upgrade for Meade LXD55/75 SN-6 / SN-8 / SN-10

JMI EV-75 Upgrade for Meade LXD55 / LXD75 SN-6 / SN-8 / SN-10 The EV-75 Upgrade makes the following changes to an EV-1n, EV-2n or EV-3n focuser to prepare it to replace the stock focuser on the Meade Schmidt-Newtonian: 1)  Add an Adapter (EV-ADPT5)...

JMI Illuminated Dial for EV Telescope Focusers $56.00

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JMI Illuminated Dial for EV Telescope Focusers

JMI Illuminated Dial for EV Telescope Focusers This upgrade uses an LED to illuminate the focuser positioning dial on any EV focuser.  Pressing the switch activates the LED which automatically shuts off (slowly fading to dark). This EV-1c has the...

JMI Next Generation Focuser NGF-XT (Newtonian) $546.00

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JMI Next Generation Focuser NGF-XT (Newtonian)

JMI NGF-XT Focuser  (Newtonian)   A 3" black-anodized (gold-anodized optional) aluminum "Extreme" focuser designed for use on large (10" to 16") Cassegrain Telescopes (NGF-XTc) with standard output threads and Newtonian...

JMI Next Generation Focuser NGF-XT (Newtonian with Motor) $697.00

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JMI Next Generation Focuser NGF-XT (Newtonian with Motor)

JMI NGF-XT Focuser  (Newtonian with Motor)   A 3" black-anodized (gold-anodized optional) aluminum "Extreme" focuser designed for use on large (10" to 16") Cassegrain Telescopes (NGF-XTc) with standard output threads and...

JMI Next Generation Focuser NGF-XT (Cassegrain with Motor) $697.00

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JMI Next Generation Focuser NGF-XT (Cassegrain with Motor)

JMI NGF-XT Focuser  (Cassegrain with Motor)   A 3" black-anodized (gold-anodized optional) aluminum "Extreme" focuser designed for use on large (10" to 16") Cassegrain Telescopes (NGF-XTc) with standard output threads and...

JMI Next Generation Focuser NGF-XT (Cassegrain) $546.00

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JMI Next Generation Focuser NGF-XT (Cassegrain)

JMI NGF-XT Focuser  (Cassegrain)   A 3" black-anodized (gold-anodized optional) aluminum "Extreme" focuser designed for use on large (10" to 16") Cassegrain Telescopes (NGF-XTc) with standard output threads and Newtonian...

JMI Reverse Crayford 1¼" Focuser $121.00

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JMI Reverse Crayford 1¼" Focuser

JMI Reverse Crayford 1¼" Focuser For all RCF focusers you must specify whether you want a flat or curved base.  For curved bases, you need to specify the radius.  If you don't, you will get the standard size radius.  Please specify your...


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Telescope Parts - Antares