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Accessories - Bob's Knobs Collimation Knobs Takahashi Mewlon 300 Secondary

Bob's Knobs Collimation Knobs Takahashi Mewlon 300 Secondary

Bob's Knobs
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Estimated Arrival: Between Nov 29 and Dec 05. *ETA to USA Only

Shipping & Returns: Satisfaction guaranteed 30 day return policy.


The knobs below will fit all versions of the Takahashi Mewlon 180, 210, and 300 mm aperture Dall-Kirkham secondary. We do not offer knobs for the Mewlon 250 because of the factory collimation screw geometry. Select knobs for your telescope from the list below. Price is for a complete set of knobs.

Fits: Takahashi Mewlon 300 versions


  1. The factory dust cover will fit normally with the knobs in place.
  2. This telescope has a push-pull collimation arrangement that requires a total of six knobs. Clearance is tight around the electric focuser.



Black plastic, 13mm (1/2”) diameter


Stainless steel


We know that once you've placed your order, you are anxious to receive it! We make every effort to get your order shipped out to you as quickly as possible.

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. We will process the charges to your credit card and your order will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

Standard shipping time in the US is between 3-5 business days, though it can vary slightly depending on the destination. We typically For updates on your shipment you can enter your tracking number here.

We distribute nationwide via UPS and Fedex. Unfortunately, at this time we are not able to provide expedited or international shipping.