JMI EV2-N Event Horizon telescope focuser for Newtonian, view 1 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 2 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 3 of 7
JMI ADPT2-1.25T combination 1.25 inch eyepiece and T-thread adapter (included accessory)
Lumicon LA1060 2 inch male to SCT male adapter (included accessory)
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 4 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 5 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 6 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 7 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 1 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 2 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 3 of 7
JMI ADPT2-1.25T combination 1.25 inch eyepiece and T-thread adapter (included accessory)
Lumicon LA1060 2 inch male to SCT male adapter (included accessory)
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 4 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 5 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 6 of 7
JMI EV2-N Event Horizon telescope focuser for Newtonian, view 7 of 7

JMI EV2-N Event Horizon Telescope Focuser - Newtonian

SKU: EV-2n
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CNC-Machined in the USA

Event Horizon EV2 — Single-Speed Crayford Focuser, Newtonian Base

A single-speed Crayford focuser with rubber grip knobs and an 8 lb load capacity — replaces the stock focuser on your Newtonian for true zero-backlash, zero-image-shift focus, built for heavier imaging trains.

A masterpiece of engineering and workmanship, the EV2 is a low-profile, friction-drive Crayford focuser for the discriminating astronomer. The Crayford design presses a metal drive shaft directly against a machined metal drawtube held by bearings on the opposing side — a direct surface-to-surface drive that eliminates the backlash and drawtube shift of rack-and-pinion designs and allows very fine adjustments. Zero image shift and zero backlash make it superb for both visual use and imaging.

Specifications

  • ✓ Single-speed friction drive with rubber grip knobs
  • ✓ Compression ring for secure, mar-free holding of eyepieces and cameras
  • ✓ Zero image shift, zero backlash — CNC-machined friction-drive Crayford design
  • ✓ Drawtube length of travel is configurable at the time of order (see drop-down menu)
  • ✓ Compatible with Newtonian telescope tubes 7.25″ in diameter or larger, as well as flat focuser boards
  • ✓ Load capacity 8 lb · focuser weight 1.4 lb
  • ✓ Individually assembled and tested in our own facility — 100% made in the USA
Fitting note: Fitting a new focuser onto an existing Newtonian takes careful consideration and engineering — it is not a one-size-fits-all swap. Many publicly available tools and active community forums can help you plan the change.

Optional Optical Adapters

  • JMI Combination 1.25″ Eyepiece & T-Thread Adapter (ADPT2-1.25T) — for camera use. Mounts a CCD or other T-threaded camera into a 2″ drawtube, and doubles as a 1.25″ adapter. Uses a compression ring and includes 48 mm filter threads on the focuser end.
  • Farpoint 2″ Focuser to 1.25″ Eyepiece Adapter (FAV100) — a visual 2″-to-1.25″ eyepiece adapter with a non-marring compression ring. Threaded for both 2″ and 1.25″ filters, with a stop to keep long eyepieces from damaging filters.
New to Crayford focusers? Read the Event Horizon Focusers guide. Want the 10:1 dual-speed? See the EV1. Have a Schmidt-Cassegrain instead? See our SCT Focusers.

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