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) and 1½ times finer (large inner knob) than most rack-and-pinion focusers.

The Newtonian version (EV-1n) mounts on a range of surfaces from a 7.25" diameter, or larger, tube to a flat surface.

The Cassegrain version (EV-1c) is designed for use on 6" to 16" Cassegrain telescopes (e.g. SCT and Mak-Cas) with standard output threads.  It includes an SCT threaded output adapter to allow use of standard SCT equipment on the output side of the focuser.  The focuser gives 1/2" of travel and is designed for fine focus after rough adjustment with the normal telescope focusing knob.

The Refractor version (EV-1r) mounts in many refractors having one of two different inside diameters of approximately 3.5" and 3.75".  The following is a partial list of refractors that should accept the focuser:

Celestron C4-R, C6-R, C6-RGT, Firstscope 102; Orion AstroView 100 EQ / 120ST EQ, SkyView Pro 120; Synta / Sky-Watcher (Pro Computerized) 100ED-EQ5P, 120ED-EQ5P, 120AR-EQ5P, 150AR-EQ5P, (Pro Manual) 102AR-EQ5M, (Pro Refractor OTAs) P80 ED-APO, P100 ED-APO, P120 ED-APO; Vixen ED100Sf

The Motorized version comes with a hand control unit.

See the Differences Between Models, the EV Options, the Focuser Accessories Page and the Focuser Comparison Chart.  For additional equipment see the Smart Focus and DRO products.  (Specify all options and accessories when ordering.)

NOTE	Although the EV-1c can be plugged into the telescope's base allowing control from the Meade hand unit, you will have better control with the JMI hand unit.  Our hand unit includes an electronic brake (not included in Meade systems), which stops the motor as soon as you quit pressing the keys, and linear voltage control for superior speed control.  Also, some older LX200 telescopes do not have enough power to properly run the motor on the low setting.
	The Event Horizon focuser has a totally modular design.  EV-1nM product code signifies a Model 1 with a Newtonian base and a motor.  The EV-1 includes a dual-speed drive with mechanical counter.  Click Here to view the product at different angles.  See our Focuser Comparison Chart for complete specifications.
	Back View of EV-1n
	This image shows an EV-1r mounted on an Orion refractor telescope.
	This image shows an EV-1cM mounted on a Meade ETX-LS 6" scope.
	Newer Event Horizon focusers have a larger drawtube thumbscrew.  (The conversion took place during the first half of 2010.)

EV-2c
Model 2
Cassegrain Version
without Motor



EV2C
$250.00
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EV-2cM
Model 2
Cassegrain Version
with Motor



EV2CM
$400.00
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EV-2r
Model 2
Refractor Version
without Motor



EV2R
$290.00
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EV-2rM
Model 2
Refractor Version
with Motor



EV2RM
$440.00
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EV-2 Telescope Focuser

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 Newtonian version (EV-2n) mounts on a range of surfaces from a 7.25" diameter, or larger, tube to a flat surface.

The Cassegrain version (EV-2c) is designed for use on 6" to 16" Cassegrain telescopes (e.g. SCT and Mak-Cas) with standard output threads.  It includes an SCT threaded output adapter to allow use of standard SCT equipment on the output side of the focuser.  The focuser gives 1/2" of travel and is designed for fine focus after rough adjustment with the normal telescope focusing knob.

The Refractor version (EV-2r) mounts in many refractors having one of two different inside diameters of approximately 3.5" and 3.75".  The following is a partial list of refractors that should accept the focuser:

Celestron C4-R, C6-R, C6-RGT, Firstscope 102; Orion AstroView 100 EQ / 120ST EQ, SkyView Pro 120; Synta / Sky-Watcher (Pro Computerized) 100ED-EQ5P, 120ED-EQ5P, 120AR-EQ5P, 150AR-EQ5P, (Pro Manual) 102AR-EQ5M, (Pro Refractor OTAs) P80 ED-APO, P100 ED-APO, P120 ED-APO; Vixen ED100Sf

The Motorized version comes with a hand control unit.

See the Differences Between Models, the EV Options, the Focuser Accessories Page and the Focuser Comparison Chart.  For additional equipment see the Smart Focus and DRO products.  (Specify all options and accessories when ordering.)

NOTE	Although the EV-2c can be plugged into the telescope's base allowing control from the Meade hand unit, you will have better control with the JMI hand unit.  Our hand unit includes an electronic brake (not included in Meade systems), which stops the motor as soon as you quit pressing the keys, and linear voltage control for superior speed control.  Also, older LX200 telescopes do not have enough power to properly run the motor on the low setting.
	This is a front view of the EV-2c which has a Cassegrain base.  See our Purchasing Hints for a brief explanation of the differences between EV models and our Focuser Comparison Chart for complete specifications.  (NOTE:  This focuser does not have the standard Event Horizon sticker attached.  To see the logo sticker, view the EV-1nM above.)
	This is a back view of the EV-2cM showing the miniature motor (also without the standard Event Horizon sticker attached).
	Newer Event Horizon focusers have a larger drawtube thumbscrew.  (The conversion took place during the first half of 2010.)

EV-3 Telescope Focuser

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 Newtonian version (EV-3n) mounts on a range of surfaces from a 7.25" diameter, or larger, tube to a flat surface.

The Cassegrain version (EV-3c) is designed for use on 6" to 16" Cassegrain telescopes (e.g. SCT and Mak-Cas) with standard output threads.  It includes an SCT threaded output adapter to allow use of standard SCT equipment on the output side of the focuser.  The focuser gives 1/2" of travel and is designed for fine focus after rough adjustment with the normal telescope focusing knob.

The Refractor version (EV-3r) mounts in many refractors having one of two different inside diameters of approximately 3.5" and 3.75".  The following is a partial list of refractors that should accept the focuser:

Celestron C4-R, C6-R, C6-RGT, Firstscope 102; Orion AstroView 100 EQ / 120ST EQ, SkyView Pro 120; Synta / Sky-Watcher (Pro Computerized) 100ED-EQ5P, 120ED-EQ5P, 120AR-EQ5P, 150AR-EQ5P, (Pro Manual) 102AR-EQ5M, (Pro Refractor OTAs) P80 ED-APO, P100 ED-APO, P120 ED-APO; Vixen ED100Sf

The Motorized version comes with a hand control unit.

See the Differences Between Models, the EV Options, the Focuser Accessories Page and the Focuser Comparison Chart.  For additional equipment see the Smart Focus and DRO products.  (Specify all options and accessories when ordering.)

NOTE	Although the EV-3c can be plugged into the telescope's base allowing control from the Meade hand unit, you will have better control with the JMI hand unit.  Our hand unit includes an electronic brake (not included in Meade systems), which stops the motor as soon as you quit pressing the keys, and linear voltage control for superior speed control.  Also, older LX200 telescopes do not have enough power to properly run the motor on the low setting.
	This is a back view of the EV-3n.  The EV-3 economy Event Horizon focuser has the same quality as the EV-1 and EV-2 but fewer features.  See our Purchasing Hints for a brief explanation of the differences between EV models and our Focuser Comparison Chart for complete specifications.  (NOTE:  This focuser does not have the standard Event Horizon sticker attached.  To see the logo sticker, view the EV-1nM above.)
	Newer Event Horizon focusers have a larger drawtube thumbscrew.  (The conversion took place during the first half of 2010.)
	This image shows an EV-3r Focuser on an Orion AstroView 100mm f/6.  The photo is courtesy of John Mills.
	This image shows an EV-3r Focuser on an Orion AstroView 100mm f/6.  The photo is courtesy of John Mills.

EV-B Telescope Focuser

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).

NOTE 1:  For an aftermarket upgrade see Individual Parts.

	This EV-1c has the Illuminated Dial option installed.  You can see it above and to the left of the focuser positioning dial.
	This is an animation of the Illuminated Dial which switches between normal lighting and illumination in the dark.  Click on the animation to see a larger version.  Once the LED is turned on it slowly fades to dark.

EV-75 Upgrade for Meade LXD75 SN-6 / SN-8 / SN-10

Meade LXD55 SN-6 / SN-8 / SN-10, 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) to the standard Newtonian Base.
     The adapter is made specifically for the SN-6 / SN-8 / SN-10.

3)  Change the Drawtube from 3" to 2.5" length.

3)  Add a 2" diameter x 2.13" height Enhanced Extension Tube (ADPT2X2.1E).

4)  Upgrade the 1.25" Eyepiece Adapter to a Combination 1.25" Eyepiece and
     T-thread Adapter (ADPT2-1.25T).

NOTE 2:  The Event Horizon focuser can only be upgraded for the listed price at the time of purchase.  For aftermarket upgrades, please purchase the following four individual parts:

Base Adapter EV-ADPT5
2.5" Drawtube EV-DT25
Extension Tube ADPT2X2.1E
T-thread Adapter ADPT2-1.25T

EV-75 Upgrade Base Adapter

EV-VMC Upgrade for Vixen Cassegrain

Vixen VMC 200, VMC 260

The EV-VCM Upgrade makes the following changes to an EV-1c, EV-2c or EV-3c focuser to prepare it to replace the stock focuser on the Vixen Cassegrain:

1)  Upgrade to a special Vixen Cassegrain Base.
     The base is made specifically for the VMC.

2)  Upgrade the 2.0" Drawtube to a 4.6" Drawtube.

3)  Upgrade the 1.25" Eyepiece Adapter to a Combination 1.25" Eyepiece and
     T-thread Adapter (ADPT2-1.25T).

NOTE 3:  The Event Horizon focuser can only be upgraded for the listed price at the time of purchase. 

EV-VMC Upgrade allows you to replace the original Vixen focuser with a JMI EV focuser.

Upgrade any EV-3 or EV-2 to an EV-1 Focuser

JMI EV-3n, EV-3nM, EV-3c, EV-3cM, EV-3r, EV-3rM

To upgrade, simply remove the old drive block and install this new one.  The upgrade includes the following individual parts:

1)  Dual-speed Drive with Dial Indicator
2)  Pusher Bearing
3)  Rubber-gripped Gold Knobs
4)  7/64" Hex Wrench
5)  Instructions for safely swapping the drive system

EV Telescope Focuser Individual Parts

The replacement or ad-on parts may be purchased individually.  If you wish to design your own focuser, please go to to the Build-Your-Own page to build a code to use when ordering your special-order EV-B "Build-Your-Own" focuser.  See EV-75 Upgrade above for upgrading a Newtonian EV Focuser for an LXD75 Schmidt-Newtonian scope.  The following individual parts are available:

Body

Base, Newtonian
Base, Cassegrain (2" diameter thread)
Base, Large-Format Cassegrain (3.25" diameter thread)
Base, Extra-Large-Format Cassegrain (4" diameter thread)
Base, Refractor (for approximately 3.5" and 3.75" inside diameter of telescope tube)

Base Adapter, LXD75 Schmidt-Newtonian

Drawtube, 2.0" length
Drawtube, 2.5" length
Drawtube, 3.0" length
Drawtube, 4.6" length
Drawtube, 5.75" length

Drive, Dual Speed with Dial Indicator  See note 4
Drive, Single Speed  See Note 4

Illuminated Dial

Pusher Bearing  See Note 4

Knob, Rubber-Gripped Gold  See Note 4
Knob, Knurled-Aluminum Silver  See Note 4

Motor (The motor option comes with all necessary mounting hardware and a hand control unit.)

NOTE 4:  If you are purchasing an after-market drive system, you must select:
1) The type of drive — Single Speed (EV-DRVS) or Dual Speed (EV-DRVD),
2) A pusher bearing, if desired (EV-PUSH) and,
3) The type of knobs — Knurled-Aluminum Silver (EV-KNBA) or Rubber-Gripped Gold (EV-KNBR)
since the drive is sold as a complete unit.  Please note that the Knurled-Aluminum Silver Knobs (EV-KNBA) are not available with the Dual-Speed Drive (EV-KNBA)