Tele Vue TRF-2008 Flattener / reducer 0,8x for refractors

The Tele Vue TRF-2008 is an exceptional device that combines the functionalities of a professional flattener and a 0.8x focal length reducer. Primarily designed as an accessory for Tele Vue TV-76 and TV-85 refractors, this versatile instrument can also be used with telescopes offered by other manufacturers with a focal length ranging from 400 to 600 mm.

With its optical design, the TRF-2008 maintains a standard back focus distance of 55mm, a feature commonly found in most digital SLR cameras. This ensures compatibility and ease of use with a wide range of photography equipment.

Connecting the TRF-2008 to your telescope is a breeze, as it directly attaches to telescopes with a 2-inch focuser. Your camera or imaging device can be securely mounted using a standard T2 thread, providing a reliable and stable connection.

Key Features of the Tele Vue TRF-2008 Flattener:

Three-Element Flattener: The TRF-2008 features a high-quality three-element optical system. This advanced design effectively corrects distortions and field curvature, resulting in crisp and flat images across the entire field of view.

Full Anti-Reflective Coating: The optical system of the TRF-2008 is coated with a full multi-layer coating (FMC). This coating minimizes internal reflections and maximizes light transmission, ensuring excellent image contrast and clarity.

Technical Specifications:

• Focal Length Reduction: 0.8x
• Optical System: Three-element design
• Coating: Full multi-layer coating (FMC)
• Compatibility: Tele Vue TV-85, Tele Vue TV-76, refractors with focal length 400 - 600 mm
• Focuser Diameter: 2 inches
• Device Connection: T2 thread
• Back Focus: 55 mm (56 ± 2 mm)

Package Contents:

• Tele Vue TRF-2008 flattener

Expert Advice:

It is important to note that the TRF-2008 maintains a constant back focus value, which refers to the distance from the lens to the primary focus, such as the camera's image sensor. While focal length reducers and Barlow lenses typically allow for adjustments to the reduction or magnification factor by changing the distance from the primary focus, this is not the case with flatteners or field correctors.

When using the TRF-2008, achieving optimal image sharpness requires precise determination of the correct focal length, often with a precision of 0.1 mm. Therefore, it is crucial to set the appropriate focal length to ensure a sharp and distortion-free image when utilizing this accessory.

The Tele Vue TRF-2008 flattener opens up new possibilities for astrophotography enthusiasts and professionals alike. With its impeccable design, advanced optical system, and precise focal length reduction, this accessory is a valuable addition to any telescope setup, delivering stunning and accurate images of the night sky.