{"product_id":"ioptron-6232","title":"iOptron Dielectric Star Diagonal (2'')","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2-inch Barrel for Wide-Field Eyepieces\u003c\/li\u003e\n\u003cli\u003eMulti-Layer Dielectric Mirror Coatings\u003c\/li\u003e\n\u003cli\u003eHigh-Reflectivity for Brighter Images\u003c\/li\u003e\n\u003cli\u003eEnhanced Coating Durability and Longevity\u003c\/li\u003e\n\u003cli\u003eCompression Ring for Secure, Mar-Free Clamping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eDielectric Star Diagonal (2'')\u003c\/h2\u003e\n\u003cp\u003eThe Dielectric Star Diagonal (2'') is a fundamental upgrade for any telescope equipped with a 2-inch focuser, enabling the use of wide-field 2-inch eyepieces to unlock the maximum possible true field of view. Its dielectric mirror coatings deliver higher reflectivity and far greater durability than standard aluminum, ensuring your views are as bright as possible while protecting your investment for years of demanding use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 2-inch Barrel Advantage: A Wider Window to the Cosmos\u003c\/h3\u003e\n\u003cp\u003eA 2-inch diagonal is the gateway to truly immersive, wide-field views. The larger barrel diameter allows for eyepieces with much larger field stops than 1.25-inch models, dramatically increasing the true field of view your telescope can deliver. This allows you to frame large deep-sky objects like the Andromeda Galaxy (M31) or the Pleiades (M45) in their entirety within a single view.\u003c\/p\u003e\n\u003cp\u003eFor owners of Schmidt-Cassegrain or long focal-ratio refractor telescopes, a 2-inch diagonal is often the most impactful upgrade available. It transforms a narrow-field instrument into a capable rich-field telescope, making it easier to locate objects and appreciate the grand scale of the Milky Way's star fields.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDielectric Coatings in a 2-inch Diagonal: Built for Longevity\u003c\/h3\u003e\n\u003cp\u003eUnlike standard diagonals that use a single, delicate layer of aluminum, this diagonal features advanced dielectric coatings. These are composed of dozens of micro-thin layers of material that work together to reflect light through the principle of interference. This process yields higher reflectivity across the visual spectrum, translating to brighter images at the eyepiece.\u003c\/p\u003e\n\u003cp\u003eThe primary advantage of dielectric coatings is their durability. They are chemically inert and far more resistant to scratching and environmental degradation than aluminum. This means the mirror can be cleaned when necessary without the risk of sleeking the coating, and it will not oxidize over time, maintaining its peak reflectivity for decades.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eUpgrading to a 2-inch Dielectric: The Visual Difference\u003c\/h3\u003e\n\u003cp\u003eFor a serious observer, moving from a stock 1.25-inch aluminum diagonal to a 2-inch dielectric model is a transformative step. The difference is not subtle; it's an improvement in both the brightness of the image and the sheer scale of the view. Faint details in nebulae and the outer arms of galaxies become more apparent due to the increased light transmission.\u003c\/p\u003e\n\u003cp\u003eWhile the initial investment is higher than for a standard diagonal, the combination of a wider field of view and a brighter, higher-contrast image makes it one of the most worthwhile upgrades you can make to your telescope system. The robust, long-lasting coatings ensure this critical component of your optical train will not degrade over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I upgrade my stock 1.25-inch diagonal to this 2-inch Dielectric Star Diagonal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUpgrading provides two key benefits. First, the \u003cstrong\u003e2-inch barrel\u003c\/strong\u003e allows you to use wide-field eyepieces, showing you a much larger patch of sky. Second, the \u003cstrong\u003edielectric coatings\u003c\/strong\u003e are more reflective and durable than the standard aluminum on most stock diagonals, resulting in brighter images and a longer lifespan for the accessory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of a dielectric coating on this 2-inch diagonal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is \u003cstrong\u003elongevity and durability\u003c\/strong\u003e. Dielectric coatings are extremely hard and do not tarnish or oxidize like aluminum coatings. This means the mirror maintains its high reflectivity for many years, even with occasional cleaning, ensuring your views remain bright and crisp.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 2-inch Dielectric Star Diagonal help me see faint details in galaxies like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The higher reflectivity of the dielectric mirror transmits more of the faint light from the galaxy to your eye compared to a standard diagonal. This can make the difference in teasing out subtle details like the dust lanes or the faint bridge connecting the two galactic cores of M51, especially under dark skies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my 1.25-inch eyepieces with this 2-inch Dielectric Star Diagonal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, you can. To use 1.25-inch eyepieces, you will need a \u003cstrong\u003e2-inch to 1.25-inch adapter\u003c\/strong\u003e. This simple accessory slips into the 2-inch diagonal's eyepiece holder, allowing you to securely clamp your smaller eyepieces in place.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 2-inch Dielectric Star Diagonal a good choice for my 8-inch f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. An 8-inch f\/10 SCT is a perfect candidate for this diagonal. These telescopes have long focal lengths, which naturally produce narrow fields of view. Using a 2-inch diagonal allows you to achieve significantly lower magnifications and wider true fields, making it much easier to find and enjoy large deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the dielectric coatings on this 2-inch diagonal hold up to cleaning and dew?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDielectric coatings are exceptionally robust. They are far more resistant to scratching than aluminum, so careful cleaning with proper materials (like lens cloths and approved solutions) will not harm them. They are also impervious to moisture, so exposure to dew is not a concern for the coating's integrity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coating\u003c\/td\u003e\n\u003ctd\u003eMulti-Layer Dielectric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDielectric Star Diagonal (2'')\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"[Insert%20warranty%20URL]\" rel=\"noopener\" target=\"_blank\"\u003e[Brand Name] Warranty Information\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":52917294530845,"sku":"IOP-6232","price":207.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-Dielectric-Star-Diagonal-2-1_12e49877-60a9-44a2-b561-f1257fe09fd9.jpg?v=1789142174","url":"https:\/\/davidastro.com\/fr\/products\/ioptron-6232","provider":"David Astro","version":"1.0","type":"link"}