FTF3515B-A—Feather Touch® 3.5" Diameter Dual Speed Focuser Kit, 1.375" Draw tube travel, Brake, End Cap and Tube Adapter Options


SKU: FTF3515B-A Category:


Feather Touch 3.5″ Diameter Dual Speed Telescope Focuser Kit 1.375″ DTT, Brake, End Cap and Tube Adapter Options.

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.

Please select the proper tube adapter ring and end cap that you will need.  If you need a Finder Scope Bracket, in the drop down box please pick the one that you want.  If you do not need one, please pick the not interested box.

Make your selection from the drop down boxes that are to the right of the image of the focuser.

Lifting Capacity 18-20 pounds
Draw Tube Travel 1.375″/34.93MM
Known To Fit Large RC/Dob Scopes
Accessory Locking Collar 5.125X24 Female Threads
Draw Tube Drive Mechanism Rack/Pinion
Finderscope hole thread dimension 8-32
Other Info 4 3/32 X24TPI thread on visual side of draw tube
Reduction Ratio 10:1
Weight of focuser 5.216 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 6.625″ w/Compression Ring End Cap

Additional information

Weight 9 lbs

[A35-503-AP] Asto Physics Thread 4.875x24TPI, [A35-503-FSQ106ED] Tak FSQ106ED 2009 or newer, [A35-503-TEC] 5.75" ID, No thread, fits TEC, [A35-503-TMB] Fits TMB130, Not Interested

End Cap

[EC35-505-1] 92X1 Takahashi Male Thread, [EC35-505-11] William Optics M92x1, [EC35-505-12] FLI 5 series/CFW 5-7Filter Wheel and LRGB Filters, [EC35-505-13] FLI 5 series/CFW 2-7Filter Wheel&LRGB Filters, [EC35-505-14] M48x.75 male thread, [EC35-505-3.5CR] 3.5" Compression Ring End Cap, [EC35-505-3CR] 3.0" Compression Ring End Cap, [EC35-505-65] 65×1 SkyWatcher female thread, [EC35-505-68] M68x1 female theaded end cap, [EC35-505-72] Takahashi M72x1, [EC35-505-82] APM/TMB Reducer, [EC35-505-85] Stellarvue Field Flattener, [EC35-505AP] 2.7" Astro Physics Thread, [EC35-505CR] 2.0" Compression Ring End Cap, Not Interested

Finder Scope Bracket

Not Interested, FSB-CH-Bracket 2.5/3.0, FSB-CH-Bracket 3.5