Estimated Arrival: Between May 21 and May 27. *ETA to USA Only
Shipping & Returns: Satisfaction guaranteed 30 day return policy.
A masterpiece of engineering and workmanship, JMI Dual-Speed Event Horizon Telescope Focuser - Cassegrain is a low-profile, friction-drive focuser designed for both the amateur and professional telescope market.
The highly acclaimed Crayford design uses high pressure on a metal drive shaft pressing against a 2.5"metal drawtube which is held by bearings on the opposing side. This direct surface-to-surface drive mechanism eliminates backlash and shifting of the drawtube as seen in other designs such as the rack-and-pinion focuser, and allows for very fine adjustments. Zero image shift and zero backlash makes this focuser fantastic for visual and photographic work and a must for CCD imaging. The modular design makes changes and upgrades extremely easy to accomplish.
Featuring a 2″ black-anodized aluminum focuser design with dual-speed drive, pusher bearing, rubber grip gold knobs and two-speed operation. The focuser lifts up to 8 pounds and its 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, with a 9:1 ratio. Includes a compression ring in the drawtube for holding telescope eyepieces and accessories without scratching the equipment. The adjusting screw presses against the ring which tightens around the eyepiece or accessory.
Compatible with 6″ to 16″ Cassegrain telescopes (e.g. SCT and Mak-Cas) with standard output threads. 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.
Meade Telescope Users: Although this unit can be plugged into the telescope’s base allowing control from a 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.
We know that once you've placed your order, you are anxious to receive it! We make every effort to get your order shipped out to you as quickly as possible.
As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. We will process the charges to your credit card and your order will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at firstname.lastname@example.org.
Standard shipping time in the US is between 3-5 business days, though it can vary slightly depending on the destination. We typically For updates on your shipment you can enter your tracking number here.
We distribute nationwide via UPS and Fedex. Unfortunately, at this time we are not able to provide expedited or international shipping.