Refractor telescopes often produce optical errors toward the edge of the image field. This leads to field curvature, where stars near the edges appear blurred, distorted, or out of focus. Such curvature reduces image quality and is especially undesirable in astrophotography, where visual aesthetics and pinpoint stars matter. The Hotech Field Flattener offers a simple and effective solution to this common issue. Achieving sharp stars right to the corners of the image is possible with the Hotech Field Flattener—and it is remarkably easy to use.

Achieving precise star collimation normally requires ideal conditions: clear skies, no wind, stable temperatures, minimal light pollution, a well-aligned tracking mount, thermal equilibrium of the optical tube, and a suitably bright reference star. In reality, these factors are rarely all present at the same time. As a result, traditional star collimation often becomes a frustrating trial-and-error process, moving back and forth between the front and rear of the telescope, adjusting screws while trying to judge concentricity through a high-magnification eyepiece as the defocused star image constantly shifts.

Achieving precise star collimation typically demands ideal observing conditions: clear skies, calm air, stable temperatures, minimal light pollution, a well-aligned tracking mount, thermal equilibrium of the optical tube, and a suitably bright reference star. In practice, many of these factors are beyond the observer’s control. As a result, traditional star collimation often turns into a frustrating guessing game—moving between the front and back of the telescope, adjusting screws while peering through a high-magnification eyepiece at an unstable, defocused star image. The process can be time-consuming and unreliable.

The Hubble Optics handpad features a built-in, astronomer-adjustable LED flashlight and a glow-in-the-dark keypad, making it easy to operate even in complete darkness without compromising night vision. A keyboard lock function is included, allowing only the arrow keys to remain active. This is especially useful when handing the controller to the general public, for example during outreach events, as users can safely move the telescope to explore objects like the Moon without the risk of changing critical settings.

This set includes two sturdy steel handles, each equipped with an air-filled tire with a diameter of 15 cm. The handles are mounted directly onto the rocker box of a Dobsonian telescope, allowing the entire instrument to be moved easily even when fully assembled. The telescope can be repositioned without removing the base, making setup and relocation quick and convenient during observing sessions.

The Hubble Optics lightweight sandwich mirror is a cost-effective and high-performance alternative to traditional solid mirrors and other lightweight designs on the market. Inspired by the construction principles of the Hubble Space Telescope, these mirrors combine advanced thermal behavior with excellent structural stability, delivering superior real-world optical performance. Telescope mirrors are manufactured under tightly controlled temperature and humidity conditions and are precisely measured only after reaching full thermal equilibrium.

The Hubble Optics lightweight sandwich mirror is a cost-effective and high-performance alternative to conventional solid mirrors and other lightweight designs on the market. Its construction is inspired by the design principles used for the Hubble Space Telescope, combining advanced thermal behavior with excellent structural stability to deliver superior real-world optical performance. Telescope mirrors are manufactured under strictly controlled temperature and humidity conditions and are precisely measured only after reaching thermal equilibrium.

The Hubble Optics lightweight sandwich mirror is a cost-effective and high-performance alternative to conventional solid mirrors and other lightweight designs available on the market. Its construction follows principles similar to those used in the Hubble Space Telescope, combining advanced thermal behavior with excellent structural stability to achieve superior real-world optical performance. Telescope mirrors are manufactured under tightly controlled temperature and humidity conditions and are precisely measured only after reaching thermal equilibrium.

The Hubble Optics lightweight sandwich mirror is a cost-effective and high-performance alternative to conventional solid mirrors and other lightweight designs available on the market. Its construction follows principles similar to those used in the Hubble Space Telescope, combining advanced thermal behavior with excellent structural stability to deliver superior optical performance in real observing conditions. Telescope mirrors are manufactured in tightly controlled temperature and humidity environments and are precisely measured only after reaching thermal equilibrium.

The Hubble Optics lightweight sandwich mirror is a cost-effective and high-performance alternative to conventional solid mirrors and other lightweight designs on the market. Its construction follows principles similar to those used in the Hubble Space Telescope, combining advanced thermal behavior with excellent structural stability to deliver superior optical performance under real observing conditions. Telescope mirrors are manufactured in tightly controlled temperature and humidity environments and are precisely measured only after reaching thermal equilibrium.

The Hubble Optics lightweight sandwich mirror is a cost-effective and high-performance alternative to conventional solid mirrors and other lightweight designs available on the market. Its construction is inspired by the design principles of the Hubble Space Telescope, combining advanced thermal behavior with excellent structural stability to deliver superior optical performance in real observing conditions. Telescope mirrors are manufactured in tightly controlled temperature and humidity environments and are precisely measured only after reaching thermal equilibrium.

The diameter stated in the product title and in the technical specifications refers to the minor axis of the elliptical mirror, not the major axis.

The diameter stated in the product title and in the technical specifications refers to the minor axis of the elliptical mirror, not the major axis.

The diameter stated in the product title and in the technical specifications refers to the minor axis of the elliptical mirror, not the major axis.

The diameter stated in the product title and in the technical specifications refers to the minor axis of the elliptical mirror, not the major axis.