Re: Help ID this AP Focuser

What you have there is an older "greased" Traveler focuser. It cannot be upgraded to the Feathertouch pinion, which is one reason you see so many of these for sale. For confirmation, look here on the AP website for pinion blocks that can and cannot be upgraded:

http://www.astro-physics.com/products/accessories/focus_adap/pinionblocks.htm

To adjust the motion of the focuser, follow these instructions:

http://www.astro-physics.com/tech_support/refractors/foc_pin_adj.pdf

Philip

The outer surface of the rough looking silver draw tube. Rack it completely out and rub in on with your fingers or a cloth. There doesn't have to be a huge amount, just enough to completely cover the draw tube with an extremely thin layer. The roughness you feel may be due to what little grease remains mixed with dirt and dust. Complete disassembly and a thorough cleaning with a solvent prior to re-greasing might be prudent.