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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
iOptron Dielectric Star Diagonal (2'')

iOptron Dielectric Star Diagonal (2'')

par iOptron
UGC IOP-6232
$148.00 - $148.00
$148.00
$148.00 - $148.00
$148.00
Égalisation de prix!
  • 2-inch Barrel for Wide-Field Eyepieces
  • Multi-Layer Dielectric Mirror Coatings
  • High-Reflectivity for Brighter Images
  • Enhanced Coating Durability and Longevity
  • Compression Ring for Secure, Mar-Free Clamping
En rupture temporaire
Alerte de retour en stock
Info disponibilité
Admissible à la livraison GRATUITE aux USA pour les commandes de plus de 350$.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Dielectric Star Diagonal (2'')

    The 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.

    The 2-inch Barrel Advantage: A Wider Window to the Cosmos

    A 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.

    For 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.

    Dielectric Coatings in a 2-inch Diagonal: Built for Longevity

    Unlike 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.

    The 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.

    Upgrading to a 2-inch Dielectric: The Visual Difference

    For 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.

    While 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.

  • Why should I upgrade my stock 1.25-inch diagonal to this 2-inch Dielectric Star Diagonal?

    Upgrading provides two key benefits. First, the 2-inch barrel allows you to use wide-field eyepieces, showing you a much larger patch of sky. Second, the dielectric coatings are more reflective and durable than the standard aluminum on most stock diagonals, resulting in brighter images and a longer lifespan for the accessory.

    What is the main benefit of a dielectric coating on this 2-inch diagonal?

    The primary benefit is longevity and durability. 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.

    Will this 2-inch Dielectric Star Diagonal help me see faint details in galaxies like the Whirlpool Galaxy (M51)?

    Yes. 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.

    Can I use my 1.25-inch eyepieces with this 2-inch Dielectric Star Diagonal?

    Yes, you can. To use 1.25-inch eyepieces, you will need a 2-inch to 1.25-inch adapter. This simple accessory slips into the 2-inch diagonal's eyepiece holder, allowing you to securely clamp your smaller eyepieces in place.

    Is this 2-inch Dielectric Star Diagonal a good choice for my 8-inch f/10 SCT?

    Absolutely. 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.

    How do the dielectric coatings on this 2-inch diagonal hold up to cleaning and dew?

    Dielectric 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.

  • Product Type Star Diagonal
    Barrel Size 2-inch
    Mirror Coating Multi-Layer Dielectric

    • Dielectric Star Diagonal (2'')

      × 1

    • Dust Caps

      × 2

  • [Brand Name] Warranty Information