Quote:
Originally Posted by Peter Bobroff
It is relatively easy to bring a set of eyepieces to the same parfocal standard. Pick the one with the most in travel as your standard and measure how much out travel is required for each of the others.
Ask a lathe owning friend to make up the required spacing cylinders and glue them in place.
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Not having a friend with a lathe and being relatively poor (
), I found a cheap way that was good enough for me. My 9mm focussed quite differently to my 15mm (which was focusing close enough to the 2" 26mm - that's all my eyepieces
). For fifty cents I bought a rubber O-ring from Clark Rubber which just slipped over the 9mm body. One o-ring was sufficient to get the 9mm focusing quite close to the 15mm.