TS Optics Focuser 2.5" M90x1 (60301)

The TS Optics 2.5" M90x1 Rack and Pinion Focuser is designed for telescope builders and those looking to upgrade their existing telescopes. Unlike standard Crayford focusers, this model separates the bearing system from the adjustment mechanism, providing superior stability and precise control even under heavy loads. Its robust construction and smooth adjustment make it ideal for both visual observation and astrophotography, especially when heavy accessories are used.

Rack and Pinion Adjustment
Traditional Crayford focusers use contact pressure for movement, which can lead to slippage when the pressure is reduced for smoother operation. In contrast, this focuser supports the draw tube with solid ball bearings and uses a helical toothed rack for adjustment. This design ensures smooth, slip-free movement and maximum rigidity, even when handling heavy equipment.

Optimized Clamping System
Instead of a simple clamping screw pressing on the drawtube, this focuser features a system that securely locks the adjustment position. This guarantees that your focus remains fixed with 100% reliability.

Easy Adaptation and Rotation
The focuser connects to the telescope via an M90x1 female thread and can be rotated 360° for comfortable focusing from any angle. Custom transition adapters are available for unique telescope setups, but it's important to ensure your telescope's focuser opening is at least 74 mm in diameter to accommodate the draw tube.

TS Optics is a brand of Teleskop-Service.

Specifications

Compatibility:

• Suitable for refractor telescopes

Connection to Telescope:

• M90x1 thread (12 mm thread length)

Connection to Eyepiece:

• 2" eyepiece adaptor (also fits 1.25" eyepieces)

Camera Connection:

• M63 thread

Gear Reduction:

• 1:10 micro-focusing for fine adjustment

Load Capacity:

• Supports up to 4 kg

Draw Tube Travel:

• 55 mm

Special Features:

• 360° rotation

• Ring clamp for secure attachment

• Finder shoe included

• Not motor-powered

General Information:

• Type: Focuser

• Build: Rack and pinion mechanism

• Weight: 1240 grams

This focuser is a reliable and precise choice for anyone seeking enhanced performance and stability in their telescope focusing system.