The Svbony SV193 is a dedicated 0.8x reducer/flattener designed for the ED refractor SV503 80mm f/7, elevating astrophotography to a new level.

The Svbony SV193 combines two essential functions for ambitious astrophotographers: focal length reduction and field flattening. With a reduction factor of 0.8, it shortens the effective focal length of the SV503 80mm f/7 from 560 mm to approximately 448 mm, enabling a wider field of view and shorter exposure times—ideal for deep-sky imaging.

Technical Features

• Optical design: 3 elements in 3 groups, fully multi-coated for high light transmission and minimized reflections
• Connection: 2″ barrel with M54x0.75 thread for cameras; compatible with full-frame sensors
• Filter thread: Standard 2″ thread for integrating light pollution filters
• Housing: Hard-anodized aluminum, lightweight and durable
• Field flattening: Corrects spherical aberration and edge distortion for sharp star images across the entire field

Application and Benefits

The SV193 is tailor-made for the SV503 80mm f/7 ED refractor and ensures uniform illumination across the image field—especially important for large-format sensors. The combination of reduced focal length and a flat field makes it the perfect companion for astrophotographers aiming to capture detailed images of nebulae, galaxies, and star fields.

Thanks to its high-quality construction and easy integration into existing setups (e.g., with filter wheels, OAGs, and cameras), the SV193 is not only functional but also versatile. The ability to reduce exposure times means more frames in less time—without compromising image quality.

Scope of Delivery:

• Reducer/Flattener 0.8x