Feather Touch® 3.5″ Diameter Dual Speed Telescope Focuser Kit, 4.5″ Draw Tube Travel, and Brake

Code: FTF3545B-A


Known To Fit Large Refractors
Lifting Capacity 18-20 pounds
Draw Tube Thread 4 3/32 X24TPI thread on visual side of draw tube
Draw Tube Travel 4.5″/114.30MM
Accessory Locking Collar 5.125×24 Female Thread
Other Info Focuser weighs 6 pounds
Draw Tube Drive Mechanism Rack/Pinion
Finderscope hole thread dimension 8-32
Reduction Ratio 10:1
Weight of focuser 5.938 pounds of which includes the standard adapter and 2″ compression ring end cap
Racked In from Mounting Face 5.236 w/Compression Ring End Cap
Racked Out from Mounting Face 9.736″ w/Compression Ring End Cap



In stock (can be backordered)

In stock (can be backordered)


Feather Touch® 3.5″ Diameter Dual Speed Telescope Focuser Kit, 4.5″ DTT, and Brake.=


Starlight Instruments Micro Focusers are perfect choice for advanced astronomical telescopes. Known World Wide for their amazing quality and durability, Starlight Instruments focuser’s gives absolute precision and eliminates inherent image-shift and backlash.

The telescope must have at least 4.35″ of clearance for the draw tube to go inside of the telescope, if not the draw tube will “bottom-out” and give you more back focus.

THE PERFECT FIT: Starlight Instruments Telescope Focuser upgrade is a perfect fit for your Large Format Refractor. Installed in minutes allowing smooth control and fine focusing with virtually no backlash.

DUAL SPEED FOCUSER: For a clear and detailed view, this telescope focuser has a dual-speed focusing mechanism that offers a 10:1 reduction ratio. This focuser will ensure enhanced optical precision of your telescope without any shift.

QUICK INSTALLATION: This telescope dual focuser is an easy upgrade that takes minutes to install on your telescope. It is precision machined to high tolerance that makes installation a breeze. Upgrade and enjoy the enhanced telescope performance within minutes!

PERFECT FOR ASTROPHOTOGRAPHY: Starlight Instruments telescope accessories are perfect for observing the stars and our universe! Their focuser upgrades provides extensive and responsive control to the eyepiece and is stable for observing or working on Astro-photography.

MADE IN THE USA: Constructed with premium quality materials and precision tolerances, Starlight Instruments Focusers are ideal focuser for telescope upgrades and provide long-lasting service. Starlight Instruments Feather Touch Focusers are made right here in the USA!

The photo of the telescope with Feather Touch focusers is courtesy of Bill McLaughlin.


Additional information

Weight 6 lbs
Dimensions 18 × 14 × 10 in


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