ZWO offers a 1-year warranty on the FF65 / 80 / 130 apochromats of the FF series.
ZWO FF130 Flatfield APO Astrograph
This Flatfield apochromat with a focal length of 1000 mm supports an image circle of 60 mm (full format) and requires no calculations for the back focus. When the image is in focus, the image field is flat.
The largest refractor from ZWO consists of a triplet lens with two ED glasses and a single element. This Petzval-like lens design achieves excellent colour correction and sharpness. With its self-levelling design, the FF130 has great advantages for astronomical photography. It offers more than the full-frame image field and has a fine spot diagram with only tiny distortions of the peripheral stars.
Instead of purchasing an additional flattener, calculating the back focus of the flattener or making a tedious connection to set the correct distance, astrophotographers can simply equip this apochromat with all possible photographic accessories and then the entire optical system is perfectly adjusted for imaging. The image no longer requires any external correction/field flattening by a flattener/corrector!
The FF130 comes with a pull-out dew shield, a high-quality CNC-machined tube and decorative parts. The OTA weighs 10.5 kg – the complete package with tube clamps and Losmandy rail weighs 12.5 kg. The sturdy 3.4" focuser comes with a 360° rotator and a finder shoe. M86, M68, M54 and M48 camera adaptors are also included. The M48 adaptor has an internal thread for installing 2" filters.
The back focus with the corresponding adaptors:
- 116 mm from M48x0.75 external thread
- 136 mm from M54x0.75 external thread
- 156 mm from M68x1 external thread
- 186 mm from M86x1 external thread
