Ingrandisci This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat.
Codice articolo: ZWO-FF130-APO
This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat.
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-produkt-1000.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-oaz-1000.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat.
♦ 130 mm aperture, 1000 mm focal length, f/7.7
♦ Petzval like, self flattening design with two ED elements
♦ 3.4" dual speed focuser
♦ 2" and 1.25" receptacles, M68, M54 and M48 threads
♦ Retractable dew shield
♦ Losmandy style dovetail bar
♦ Handle
♦ Vixen type finder base
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-3.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-4.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-5.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-6.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-7_2.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-8.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-9.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-9_1.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-10.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-11.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-12.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-13.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-15.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-16.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-17.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
The FF130 is a flatfield astrograph that joins the series that also includes the FF65, FF80 and FF107 models.
Instead of buying additional flatteners, calculating the backfocus of the flattener, or making a tedious connection to set the correct distance, astrophotographers can simply equip it with all sorts of photographic accessories, hold the object in focus, and then the entire optical system is perfectly set for imaging.
The FF130 has a focal ratio of 1:7 and a focal length of 740 mm. The FF130 is a quadruplet design with two ED glasses, which provides excellent control of chromatic and other aberrations. With its self-stemming design, the FF130 offers great advantages in astronomical imaging. It offers more than full-frame image circle and has a fine spot diagram with only tiny distortions of peripheral stars.
The FF130 comes with a retractable dew cap, a high-quality CNC-machined and painted tube, and decoratively designed parts. The OTA weighs 10.5 kg, and the total package with tube clamps, etc. weighs 12.5 kg. The sturdy 3.4" focuser comes with a 360° rotator with scales and a finder shoe. M86, M68, M54 and M48 camera adapters are also included, and the M48 adapter has a female M48 thread for installing 2" filters.
Backfocus is always measured with the extension tube fully retracted:
♦ 116 mm from M48x0.75 male thread
♦ 136 mm as of M54x0.75 male thread
♦ 156 mm as of M68x1 male thread
♦ 186 mm as of M86x1 male thread
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-spotdiagramm-1000.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
![This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]](https://www.teleskop-express.it/img/cms/ZWO-FF130-APO-zeichnung-1000.jpg "This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat. [EN]")
Specifiche tecniche:
| Aperture size: | 130 mm |
| Focal length: | 1000 mm |
| Focal ratio: | f/7.7 |
| Objective lens: | Air-spaced quadruplet apo, consisting of a triplet (including two ED glasses) and a single element |
| Image circle: | 60 mm |
| Eyepiece connections: | 2", 1.25" |
| Focuser: | 3.4" dual-speed rack and pinion, max. load 8 kg |
| Focuser travel: | 95 mm |
| Visual back-focus with focuser fully retreated: | 148.5 mm (from the end of 2" eyepiece holder) |
| Rear-end threads: | M86x1 male, M68×1 male, M54×0.75 male, M48×0.75 male |
| Rear-end filter adapter: | M54×0.75-M48×0.75 (M48×0.75 filter thread inside) |
| Photographic back-focus from base with focuser fully retreated: | 186 mm (from M86×1 thread), 156 mm (from M68×1 thread), 136 mm (from M54×0.75 thread), 116 mm (from M48×0.75 thread) |
| Dew shield diameter: | 169 mm front, 162 mm back |
| Tube diameter: | 146 mm |
| Total length with 1.25" receptacle: | 842.5 mm / 889.5 mm (dew shield retracted / fully stretched) |
| Total length with 4-piece adapter: | 1011.5 mm / 1061.5 mm (dew shield retracted / fully stretched) |
| Finder base: | Vixen finder shoe |
| Mount connection: | Losmandy style dovetail plate |
| Net weight: | 10.2 kg |
| Gross weight: | 12.5 kg |
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