Starlight Instruments Feather Touch 3.5″ R&P Focuser
$16.99
You will need a tube adapter ring and an endcap to install this focuser on your telescope. You also have the option to install a finder scope bracket on the focuser. Contact us if you need help choosing the right parts.The telescope must have at least 4.35″ of clearance for…
You will need a tube adapter ring and an endcap to install this focuser on your telescope. You also have the option to install a finder scope bracket on the focuser. Contact us if you need help choosing the right parts.
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.
Specifications
For the 1.375″ Draw Tube Travel Version (FTF3515B-A)
| 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 |
For the 3.5″ Draw Tube Travel Version (FTF3535B-A)
| Known To Fit | Large Refractors |
| Lifting Capacity | 18-20 pounds |
| Draw Tube Thread | 4 3/32 X24TPI thread on vizual side of draw tube |
| Draw Tube Travel | 4.5″/114.30mm |
| Accessory | Locking Collar 5.125×24 Female Thread |
| Reduction Ratio | 10:1 |
| Other Info | Focuser weighs 6 pounds |
| Draw Tube Drive Mechanism | Rack/Pinion |
| Finderscope hole thread dimension | 8-32 |
| 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 |
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