Steps to making all your eyepieces focus at the same point: ( Parfocal)

1. Pick a nice sunny day and aim your scope at a telephone pole about half a block or so away you may need an extension tube to attain such a close focus try about 2" in length or possibly your focuser will accommodate. The reason for using such a close object is a better chance for a sharp focus, try the threads on a transformer bolt.

2. Now by dropping in each one of your eyepieces find the lowest focusing one and install a ring up against the larger OD. of the eyepiece now re-focus and lock your focusers position.

3. Compare the rest of your eyepieces to this focuser position and when each eyepiece is at it's best focus tighten up the set screws on your adjustable slip ring, or whatever you are using to make up the difference.

4. Also check your barlow and make the appropriate changes this is not as critical because when observing you can just slide the barlow in the 1 1/4" adapter for a quick in the ball park focus and the eyepieces will follow.

In closing I would like to say, wether you purchase my RINGSor create your own the benefits of parfocalizing will last a lifetime. IMAGINE the wear and tear on your Helical or Crayford focuser adding up to zero over the years because it never moves more then a couple of thou.

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