Explore Scientific 99% Reflective 2" Diagonal (Pre-owned)

The Explore Scientific 99% Reflective 2" Diagonal is an optical accessory used in telescopes to divert the light path at a 90-degree angle, allowing for more comfortable viewing. Here's an overview of its features and functionality:

1. Diagonal Mirror: The diagonal mirror is a prism or mirror-based optical component that is placed in the optical path of a telescope to divert the light coming from the telescope's objective lens or primary mirror. It reflects the light at a 90-degree angle, allowing the observer to view objects in a more comfortable position, especially when the telescope is pointed at high angles in the sky.

2. 99% Reflectivity: The Explore Scientific 2" diagonal boasts a highly reflective surface, with a reflectivity of 99%. This high level of reflectivity ensures minimal light loss as the light passes through the diagonal, resulting in bright and clear views of celestial objects.

3. 2" Barrel Size: The diagonal features a 2-inch barrel size, which is compatible with telescopes that accept 2-inch eyepieces and accessories. The larger barrel size allows for a wider field of view and better light transmission compared to smaller 1.25-inch diagonals.

4. Durability and Build Quality: Explore Scientific is known for producing high-quality optical products, and their diagonals are no exception. The 99% Reflective 2" Diagonal is constructed from durable materials and features precision engineering to ensure reliable performance and longevity.

5. Enhanced Viewing Comfort: By using a diagonal mirror, observers can comfortably view celestial objects without the need to contort their bodies or necks into awkward positions. This is particularly beneficial for observing objects near the zenith (the point directly overhead) or for extended observing sessions.

6. Wide Compatibility: The 2" barrel size of the Explore Scientific diagonal makes it compatible with a wide range of telescopes, including refractors, Schmidt-Cassegrains, and Ritchey-Chrétiens, among others. It can also be used with various eyepieces and accessories that feature a 2-inch barrel diameter.

7. Easy Installation: Installing the diagonal is a straightforward process. Simply insert the diagonal into the focuser or visual back of your telescope, secure it in place, and then insert your eyepiece into the diagonal's eyepiece holder. Some diagonals may feature set screws or compression rings for secure attachment.