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Description
Lunt FocusersHelical Focuser The Lunt Mini is a non rotating helical focuser that provides a T2 (male) to T2 (female) thread connection. The focuser has 10 mm of precision travel, a brass compression ring for protection of eyepieces, and a locking collar. The T2 thread design is ideal for fine camera eyepiece focus. 1. 25" Rack & Pinion Focuser Focusing mechanisms represent a critical interface between primary optical systems and observation equipment in
Helical Focuser
The Lunt Mini is a non-rotating helical focuser that provides a T2 (male) to T2 (female) thread connection. The focuser has 10 mm of precision travel, a brass compression ring for protection of eyepieces, and a locking collar. The T2 thread design is ideal for fine camera/eyepiece focus.
1.25" Rack & Pinion Focuser
Focusing mechanisms represent a critical interface between primary optical systems and observation equipment in telescopic applications. While helical focusers have historically been employed in entry-level and solar telescope systems, their inherent mechanical limitations significantly compromise optical performance. Common deficiencies in helical focuser design include excessive backlash, limited load capacity, mechanical instability under thermal cycling, and inadequate precision for high-magnification applications.
The transition from helical to rack and pinion focusing systems addresses these fundamental limitations through superior mechanical design principles and precision CNC manufacturing techniques.
Specifications:
- Focuser Size: 1.25"
- Draw Tube Drive: Rack and Pinion
- Draw tube travel: 0.5"
- Rotatable: Yes
- Compression Ring: Yes
- Positioning accuracy: ±0.002 inches (±0.051mm)
- Load capacity: 6-8 pounds (2.7-3.6 kg)
- Backlash: <0.001 inches when properly adjusted
- Materials: CNC machined Aluminum and Brass
2" Rack & Pinion Focuser
Lunt Solar Systems’ 2" Rack & Pinion Focuser is a precision-engineered dual-speed focuser designed to deliver smooth, accurate, and repeatable focus control for both visual observation and high-resolution solar imaging. The focuser features a standard 2” drawtube with approximately 55–60mm of total travel, offering a fine 10:1 reduction ratio for effortless micro-adjustments—ideal for capturing sharp detail at high magnifications or with sensitive imaging setups. Built with robust materials and tight mechanical tolerances, it provides exceptional stability and a secure hold, even under heavy accessory loads of up to 3 kilograms (about 6.5 pounds).
This focuser comes standard on most Lunt Modular Telescopes (MT Series) including the 60MT, 80MT, and 100MT models. The 2" compression ring accepts both 2" and 1.25" accessories (adapter included) and attaches directly to the rear adapter plate using M68 or M90 threads, depending on the telescope’s aperture class. For users who prefer automated focusing, the Lunt 2" Rack & Pinion is fully compatible with ZWO EAF and Optec FocusLynx/ThirdLynx motor focus systems, making it a versatile and reliable choice for serious observers and astrophotographers alike.
Specifications and Details:
Type: Precision-machined dual-speed Rack & Pinion focuser
Size: 2” drawtube (standard telescope accessory size)
Reduction: 10:1 dual-speed fine focus control for imaging and high-power visual work
Travel: Approximately 55–60mm of total drawtube travel (depending on model and telescope)
Mounting Thread: Directly compatible with Lunt Modular Telescope (MT) series — attaches to the rear adapter plate via M68 or M90 thread interface (varies by aperture class)
Compatibility: Supplied as standard on most Lunt MT telescopes (60MT, 80MT, 100MT)
Eyepiece Side: Standard 2” compression ring with 1.25” adapter included
Load Capacity: Supports up to 2.5–3.0 kg (5–6.5 lbs) — adequate for large CCD/CMOS cameras and filter wheels
Optional Motor Focusers: Compatible with ZWO EAF and Optec FocusLynx/ThirdLynx systems (Lunt provides compatibility links for both)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy