ZWO FF131 APO Flat-Field Apochromatic Refractor
The ZWO FF131 APO Refractor achieves focus within a back focus range of 42–73 mm. This distance is measured from the M54–M48 interface shoulder.
Main Features
Flexible Connectivity for Multiple Configurations
Uniqueness
Four-Element Optical Design
This telescope features a four-element, fully air-spaced design. These elements deliver a flat imaging field without a flattener.
One ED glass element effectively reduces chromatic aberration. This ensures superior color correction and high image clarity for astrophotographers.
44 mm Image Circle — Full-Frame Support
With a 44 mm image circle, this telescope fully supports full-frame sensors. It accommodates a wide range of advanced imaging setups.
It produces sharp star fields with excellent edge performance. Enjoy consistent quality across the entire frame without vignetting.
Native Flat-Field Design
The native flat-field design eliminates the need for an external flattener. This simplifies your optical train for better results.
Forget complex back focus calculations. Attach your imaging setup and start capturing once focal point is achieved.
Convenient Refractor Design
Coarse & fine focus adjustment
The rigid 3-inch rack-and-pinion focuser provides precise control. It uses a 1:10 dual-speed mechanism for perfect sharpness.
A built-in 360° rotator at the rear allows for smooth camera rotation. This makes framing your celestial targets easy and accurate.
5. Retractable Dew Shield
The telescope features a retractable dew shield. This reduces its length for safer and easier portability during travel.
Precision CNC machining and a high-quality finish ensure durability. Internal coatings minimize stray light to enhance image contrast.
6. Quick-Release Mounting Rings
The mounting rings are fully detachable. This allows for rapid setup or teardown of the telescope while in the field.
Photography Extension Tube
The FF131 APO integrates seamlessly with modern cameras. It includes a four-section extension tube with a 2-inch filter thread.
Rear adapters in M48 and M54 formats are included. This provides flexibility for connecting various astrophotography accessories out of the box.
Performance
Optical Layout
Star Field Map
Product Diagram
Technical Specifications
These specs confirm why this telescope is a top choice for experts. It represents a high-performance imaging solution.
In the Box
Warranty
ZWO 2-Years Warranty
