The FTF3035B-A is a superbly made and ultra smooth rack and pinion focuser. It is typically fitted to Refractor telescopes. Typically the FTF3035 is used for Astrophotography applications where its smoothness, high load capacity of up to 7kg and resistance to tilt are of benefit.
It has a draw tube travel of 3.5" (88.9 mm) which does not suffer from tilt thanks to its plain bearing mounting using a combination stainless steel and Teflon. The FTF3035 has a fully baffled draw tube and can easily illuminate full-frame sensors.
Please note that the APM FTF3035 is supplied with a 2" clamp and collar as shown in the image above.