Telescope Diagonal SKYOPTIKST 45° Prism

Description

Product Overview

The SKYOPTIKST 45° Diagonal is engineered for refractor telescope owners who demand precise image orientation and maximum light throughput. Constructed from aerospace‑grade aluminum, the housing resists corrosion while remaining lightweight at just 2.09 pounds. The core of the diagonal is a high‑transmittance reflective prism coated with a multi‑layer antireflective broadband green film, ensuring over 95% light transmission and minimal ghosting. Dimensions of 7.8 x 6.7 x 6 inches provide a compact footprint that integrates seamlessly with 2‑inch focuser tubes. Included is a precision‑machined 2‑inch to 1.25‑inch adapter, allowing the use of a wide range of eyepieces, Barlow lenses, and filters. The product carries the model number 2TDJ45‑HD and holds an Amazon Best Sellers Rank of #40 in Telescope Diagonals, reflecting its popularity among serious amateur astronomers.

Usage

Designed for both daytime planetary observation and deep‑sky night sessions, this diagonal excels in a variety of environments. Whether you are setting up on a backyard patio, a portable field tripod, or a permanent observatory pier, the 45‑degree angle offers a comfortable viewing posture that reduces neck strain during extended sessions. The upright image correction is especially valuable for astrophotography, where framing and focus are critical. The adapter’s compatibility with 1.25‑inch accessories means you can quickly switch between high‑power eyepieces for lunar detail and wide‑field filters for nebulae without re‑balancing the mount. Ideal for educators demonstrating celestial mechanics, hobbyists tracking satellites, and seasoned observers seeking crisp, true‑orientation views.

Why Choose Us

SKYOPTIKST combines German‑engineered optical precision with American manufacturing standards. Each prism undergoes interferometric testing to verify surface flatness within λ/10, guaranteeing that the image remains sharp across the entire field of view. The multi‑layer green antireflective coating is applied in a clean‑room environment, reducing surface scatter and enhancing contrast, particularly in low‑light conditions. Our rigorous quality assurance includes a 12‑month warranty and a dedicated support line for alignment assistance. Unlike generic diagonals that rely on plastic prisms, our all‑metal construction ensures thermal stability, preventing focus drift as temperatures change throughout the night.

Key Features

• High‑transmittance reflective prism with >95% light efficiency
• Multi‑layer antireflective green coating minimizes ghosting and flare
• 45‑degree viewing angle provides ergonomic comfort for long sessions
• 2‑inch to 1.25‑inch adapter expands accessory compatibility
• Robust aluminum housing ensures durability and thermal stability

FAQ

Does this diagonal work with both 2‑inch and 1.25‑inch eyepieces?

Yes. The included 2‑inch to 1.25‑inch adapter allows you to attach standard 1.25‑inch eyepieces, Barlow lenses, and filters while maintaining a secure fit on 2‑inch focuser tubes.

Will the image be upright and correctly oriented?

The high‑quality reflective prism corrects the upside‑down and left‑right reversal typical of refractor telescopes, delivering an upright, true‑orientation image suitable for visual observation and astrophotography.

Is the diagonal suitable for astrophotography?

Absolutely. The combination of high light transmission, minimal chromatic aberration, and an upright image makes it ideal for attaching cameras or DSLR adapters for deep‑sky imaging.

How does the antireflective coating improve performance?

The broadband green antireflective film reduces surface reflections to less than 1%, enhancing contrast and color fidelity, especially when observing faint nebulae or planetary detail.

What is the warranty period?

SKYOPTIKST offers a 12‑month limited warranty covering manufacturing defects, and our customer service team is available to assist with any alignment or fit issues.