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Telescope accessories > Focusers > Micro Focuser > JMI > JMI Dual-Speed Focuser (Cassegrain)
Product no.: 76439

Dual-Speed Focuser (Cassegrain)

$ 590.00 incl. VAT plus shipping costs
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Product description

In brief:

  • High-quality and precise micro focuser
  • SC connection thread for Cassegrain and SC telescopes
  • 1:09 fine reduction

The JMI EV-1c Dual-Speed Event Horizon Telescope Focuser is a low-profile, friction-driven focuser designed for both the amateur and professional telescope markets.

The Crayford design applies high pressure to a metal drive shaft that presses against a 2.5-inch focuser tube held by bearings on the opposite side. This direct surface-to-surface drive mechanism eliminates play and shift of the extension tube, allowing for very fine adjustments. This makes this focuser fantastic for visual applications and a must-have for astrophotography with Cassegrain or Schmidt-Cassegrain optics.

Equipped with a 2-inch black anodised aluminium focuser with dual-speed drive, ball bearings, rubberised knobs and two-speed operation. The focuser carries up to 8 pounds and its manual two-speed control has a 1:09 fine reduction ratio. It also includes a compression ring to securely hold telescope eyepieces and accessories without scratching them. The adjustment screw presses against the ring, which tightens the eyepiece or accessory.

Specifications

Capacity


Appropriate for telescopes
Cassegrain

General


Type
Focuser
Type of build
Micro Focuser

Product safety

Manufacturer:
JMI Dual-Speed Focuser (Cassegrain)
JMI Dual-Speed Focuser (Cassegrain)
JMI Dual-Speed Focuser (Cassegrain)

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