bob's knobs

bob's knobs celestron sct 5” f/10 metric (stainless steel)

bob's knobs celestron sct 9.25” f/10 metric (stainless steel)

bob’s knobs 3 collimating knobs for celestron 11" sct with trifid secondary (not edge hd)

bob's knobs celestron sct 9.25” f/10 standard

bob's knobs celestron starhopper 12" primary

bob's knobs meade sct 10” widefield f/6.3

bob's knobs meade lightbridge secondary

bob's knobs takahashi mewlon 210 secondary

bob's knobs orion optics (uk, oouk) gx250 and europa 250 secondary

bob's knobs astro-tech at6rc secondary(at6rc)

bob's knobs celestron sct 5” f/10 metric (black oxide)

bob's knobs celestron sct 9.25” f/10 metric (black oxide)