Bobs Knobs for my Quattro 250P

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Eric Jeziorczak avatar
I recently purchased the 30mm Bobs knobs (Stated that it fits for scopes 5"-10" ) for my secondary mirror on the Quattro 250P, the only issue is that its not long enough, am I doing something wrong or do I have to buy the 35mm knobs?
Rick Krejci avatar
I originally bought 30mm generic M4 knobs off of Amazon for my Quattro 250, but they were too short so I bought the 35mm long ones which work great  https://www.amazon.com/dp/B07KPG4SXP?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
Concise
Eric Jeziorczak avatar
I will order those, thank you!
Joel Lee avatar
Hi Eric,

I recently got the 40mm ones from them under this page: http://www.bobsknobs.com/Newt/styled-6/SWMN.html and they work well for me. It looks like you can go up to 45mm for the screw length if that is your preference. If you can find them at 40mm on Amazon that's probably the move.
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