3.5" Focuser R/P

The FTF3545B-A is a high-end focuser for APO refractor telescopes or big RCs which are equipped with large 32 correctors for astrophotography.

• Draw tube travel 4.5" or 114.3 mm
• 100% correct position of of the image plane - the draw tube does not bend
• 89 mm clear aperture, enough to illuminate full-frame sensors
• Adjustment of the draw tube through rack and pinion. The tube itself is plain bearing mounted, using the combination stainless steel and Teflon.
• 3.5", 3" and 2" adapters are optional