Refractor Fine Focus Knob
2-1/2" diameter knob attaches to the focus knob of Short-
Tube 80, ST90, ST102, and many similar refractors for fine
focus control with less scope shake. This knob is a significant
functional addition to economy class refractors that don't
have the best focusers! Machined from black delrin, with
knurled edge and stainless steel attachment screw. Doesn't
smell like peanut butter.
Prices include FREE shipping in the USA!
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