{"product_id":"bobs-knobs-for-skywatcher-celestron-newtonian-primary-swpri","title":"Bob's Knobs for SkyWatcher \u0026 Celestron Newtonian Primary (SWpri)","description":"\u003ch2\u003eBob's Knobs for SkyWatcher \u0026amp; Celestron Newtonian Primary\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFits\u003c\/strong\u003e: SkyWatcher Newtonian telescopes with factory collimation screws.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003ePrimary collimation\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKnobs: Black plastic, 16 mm (5\/8”) diameter\u003c\/li\u003e\n\u003cli\u003eThreads: Stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary Lock\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKnobs: Red plastic, 16 mm (5\/8”) diameter\u003c\/li\u003e\n\u003cli\u003eThreads: Stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e:\u003cbr data-mce-fragment=\"1\"\u003eOur knobs will fit only a primary with factory collimation screws. If your telescope already has factory collimation knobs (see Item B below) our knobs will not fit.\u003cbr data-mce-fragment=\"1\"\u003eThe telescope optical tube assembly will clear the Dobsonian rocker box with primary knobs installed.\u003c\/p\u003e\n\u003cp\u003e\u003cbr data-mce-fragment=\"1\"\u003eKnobs with shorter screws and spacers replace the factory flathead Phillips collimation screws. Knobs with longer screws replace the factory set-style (grub) locking screws.\u003cbr data-mce-fragment=\"1\"\u003eSince the factory collimation and locking screws are close together, knobs must be staggered in height. The locking knobs protrude further than the collimation knobs, and they are red in color.\u003c\/p\u003e\n\u003cp\u003e\u003cbr data-mce-fragment=\"1\"\u003eProtect the locking knobs from damage, and do not support the OTA using the locking knobs as feet.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSome SkyWatcher models are equipped with factory collimation and lock knobs. Our knobs will not fit these telescopes. Although the lock knob is small, its proximity to the collimation knob prevents replacing it with a larger knob. Furthermore, the primary adjustment knob is of a different design than our replacement knobs.\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Bob's Knobs","offers":[{"title":"Default Title","offer_id":48411414102274,"sku":"igl1787937542976","price":21.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/3332\/0450\/files\/bobs-knobs-for-skywatcher-celestron-newtonian-primary-swpri_1.webp?v=1787937545","url":"https:\/\/www.plumritual.shop\/products\/bobs-knobs-for-skywatcher-celestron-newtonian-primary-swpri","provider":"My Store","version":"1.0","type":"link"}