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. 


         

Product Image Price- Item Name

JMI EV-1 Telescope Focuser (Refractor with motor) $579.00

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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 (Newtonian with Motor) $519.00

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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 (Cassegrain with Motor) $509.00

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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-2 Telescope Focuser (Refractor with motor) $489.00

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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 (Newtonian with motor) $429.00

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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-3 Telescope Focuser (Refractor with motor) $429.00

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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-1 Telescope Focuser (Refractor) $419.00

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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-2 Telescope Focuser (Cassegrain with motor) $419.00

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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-3 Telescope Focuser (Newtonian with motor) $369.00

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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-1 Telescope Focuser (Newtonian) $359.00

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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-3 Telescope Focuser (Cassegrain with motor) $359.00

Buy Now

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-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-2 Telescope Focuser (Refractor) $329.00

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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 Reverse Crayford 2" Focuser with Motor $296.00

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JMI Reverse Crayford 2" Focuser with Motor

JMI Reverse Crayford 2" Focuser with Motor A 1.25" Reverse Crayford focuser.  Motorized version include a standard hand unit.  For all RCF focusers you must specify whether you want a flat or curved base.  For curved bases, you need to...

JMI Reverse Crayford 1¼" Focuser with Motor $274.00

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JMI Reverse Crayford 1¼" Focuser with Motor

JMI Reverse Crayford 1¼" Focuser with Motor 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...

JMI EV-2 Telescope Focuser (Newtonian) $269.00

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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-3 Telescope Focuser (Refractor) $269.00

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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-2 Telescope Focuser (Cassegrain) $259.00

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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-3 Telescope Focuser (Newtonian) $209.00

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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 (Cassegrain) $199.00

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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 Reverse Crayford 2" Focuser $149.00

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JMI Reverse Crayford 2" Focuser

JMI Reverse Crayford 2" 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. Place a note in the shopping...

JMI Reverse Crayford 1¼" Focuser $129.00

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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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