{"product_id":"celestron-2-dielectric-mirror-diagonal-twist-lock","title":"Celestron 2\" Dielectric Star Diagonal, Twist-Lock","description":"\u003ch2\u003eCelestron Dielectric Star Diagonal 2” with Twist-Lock – Premium Optics for Brighter, Sharper Views\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMaximise light transmission and elevate your viewing experience\u003c\/strong\u003e with the Celestron Dielectric Star Diagonal, 2” with Twist-Lock. Designed for discerning astronomers, this premium-quality diagonal offers a simple yet transformative upgrade that significantly enhances image brightness, contrast, and sharpness—without the need to invest in a brand-new telescope.\u003c\/p\u003e\n\u003cp\u003eWhether you're observing planets, deep-sky objects, or lunar detail, this 2\" star diagonal delivers \u003cstrong\u003eexceptional optical performance\u003c\/strong\u003e and \u003cstrong\u003euser-friendly engineering\u003c\/strong\u003e, making it a must-have accessory for any serious stargazer.\u003c\/p\u003e\n\u003ch3\u003eSuperior Reflectivity with Dielectric Coatings\u003c\/h3\u003e\n\u003cp\u003eAt the heart of this diagonal is a precision-polished mirror coated with \u003cstrong\u003e58 layers of dielectric material\u003c\/strong\u003e, providing \u003cstrong\u003eover 99% reflectivity\u003c\/strong\u003e across the visible spectrum. This ultra-high reflectivity ensures \u003cstrong\u003emaximum light throughput\u003c\/strong\u003e, preserving the full brightness and clarity of your telescope’s image. Lesser diagonals can significantly degrade your view—but with this premium Celestron model, \u003cstrong\u003evirtually all the light collected by your telescope reaches your eyepiece\u003c\/strong\u003e, offering a noticeable visual improvement.\u003c\/p\u003e\n\u003ch3\u003eVersatile Compatibility with 2” and 1.25” Eyepieces\u003c\/h3\u003e\n\u003cp\u003eExpand your observing potential with support for \u003cstrong\u003elarger 2” eyepieces\u003c\/strong\u003e, which provide a wider field of view ideal for deep-sky observing. A \u003cstrong\u003estepdown adapter\u003c\/strong\u003e is also included, allowing seamless compatibility with standard \u003cstrong\u003e1.25” eyepieces\u003c\/strong\u003e. This flexibility makes the diagonal suitable for a wide range of telescope setups and viewing preferences.\u003c\/p\u003e\n\u003ch3\u003eInnovative Twist-Lock Mechanism for Secure Eyepiece Fit\u003c\/h3\u003e\n\u003cp\u003eUnlike traditional thumb screws that can misalign or damage your eyepieces, Celestron’s \u003cstrong\u003etwist-lock system\u003c\/strong\u003e holds eyepieces securely and keeps them perfectly centred. This ensures optimal alignment between your telescope and eyepiece, preserving both mechanical and optical integrity. The \u003cstrong\u003eintegrated 2” barrel stop\u003c\/strong\u003e adds an extra layer of protection, preventing long-barrelled accessories from contacting and damaging the mirror.\u003c\/p\u003e\n\u003ch3\u003eBuilt to Last – Precision Machined and Anodised\u003c\/h3\u003e\n\u003cp\u003eCrafted from \u003cstrong\u003ehigh-grade machined aluminium\u003c\/strong\u003e with \u003cstrong\u003eanodised black and orange finishes\u003c\/strong\u003e, this diagonal is as rugged as it is refined. The bright orange twist-lock ring adds visibility in low-light conditions, while the \u003cstrong\u003eglare-threaded interior\u003c\/strong\u003e and \u003cstrong\u003eflat-black paintwork\u003c\/strong\u003e in the barrel and adapter reduce stray light and internal reflections. It’s not just a tool—it’s a precision-engineered upgrade designed to last a lifetime.\u003c\/p\u003e\n\u003ch3\u003eDual-Barrel System for Maximum Telescope Compatibility\u003c\/h3\u003e\n\u003cp\u003eThis diagonal includes two interchangeable barrels for maximum versatility:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eA standard \u003cstrong\u003e2” barrel\u003c\/strong\u003e for refractor and other telescopes with 2” focusers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eA \u003cstrong\u003ethreaded SCT barrel\u003c\/strong\u003e designed specifically for \u003cstrong\u003eSchmidt-Cassegrain telescopes\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBoth barrels thread directly onto the diagonal housing, ensuring a secure, wobble-free connection without the need for additional adapters.\u003c\/p\u003e\n\u003ch3\u003eWhy Upgrade to a Dielectric Star Diagonal?\u003c\/h3\u003e\n\u003cp\u003eStandard star diagonals typically use mirrors with lower reflectivity and may introduce optical aberrations, resulting in \u003cstrong\u003edimmer and less sharp images\u003c\/strong\u003e. The Celestron Dielectric Star Diagonal offers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOver 99% reflectivity\u003c\/strong\u003e for brighter views\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiffraction-limited optical quality\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eImproved contrast and resolution\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnhanced overall telescope performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA diagonal might seem like a small part of your setup, but upgrading to a premium model can have a \u003cstrong\u003edramatic impact on your visual astronomy\u003c\/strong\u003e. It's a smart investment for any astronomer who values quality and performance.\u003c\/p\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2” mirror star diagonal with 58-layer dielectric coatings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOver 99% reflectivity for maximum light transmission\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAccepts both 2” and 1.25” eyepieces (adapter included)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSecure, non-marring twist-lock eyepiece holder\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDual barrel system: 2” and SCT-threaded barrels included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDurable, CNC-machined aluminium construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGlare-reducing interior threading and flat black paint\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBarrel stop prevents mirror damage from long accessories\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUpgrade Your Telescope – See the Difference\u003c\/h3\u003e\n\u003cp\u003eExperience sharper, brighter, and more immersive celestial views with the \u003cstrong\u003eCelestron Dielectric Star Diagonal, 2” with Twist-Lock\u003c\/strong\u003e. It’s the perfect way to unlock the full potential of your telescope—no new optics required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrder now\u003c\/strong\u003e and take your stargazing to the next level.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":55897345687926,"sku":"050234935739","price":279.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2235\/3014\/files\/Celestron-2_-Dielectric-Star-Diagonal-Twist-Lock-product-photo-1.webp?v=1752576140","url":"https:\/\/welshastronomy.co.uk\/products\/celestron-2-dielectric-mirror-diagonal-twist-lock","provider":"The Welsh Astronomy Centre","version":"1.0","type":"link"}