This telescope is checked, measured and, if necessary, adjusted by us before delivery. The focuser is adjusted. 

Examples of our test protocols: Test recordings
How we adjust: About us
 
ZWO FF130 Flatfield APO Astrograph


This long focal ratio flatfield apochromat supports a 60mm image circle and requires no back focus calculations. When the image is sharp, the field of view is flat.

♦ 130mm aperture, 1000mm focal length, f/7.7

♦ Petzval-like, self-leveling design with two ED elements

♦ 3.4" focuser with reduction

♦ 2" and 1.25" connections, thread M68, M54 and M48

♦ Retractable dew cap

♦ Prism rail according to Losmandy standard

♦ Handle

♦ Vixen Seeker Shoe

 
ZWO 130mm f/7 APO astrograph
The FF130 is a flatfield astrograph, part of the range that also includes the FF65, FF80 and FF107 models.

Optical design
Instead of buying additional flatteners, calculating the back focus of the flattener, or making a tedious connection to set the correct distance, astrophotographers can simply equip it with all sorts of photographic accessories, keep the object in focus, and then the entire optical system is perfect for the figure set.
 
High quality glasses
The FF130 has an aperture ratio of 1:7 and a focal length of 740mm. The FF130 is a quadruplet design with two ED lenses, allowing excellent control of chromatic and other aberrations. With its self-leveling design, the FF130 offers great advantages for astronomical photography. It offers more than the full-frame image circle and has a fine spot diagram with only tiny distortions of the peripheral stars.
 
Practical details

The FF130 comes with an extendable dew cap, a high quality CNC milled and painted tube and decoratively designed parts. The OTA weighs 10.5 kg, the entire package with pipe clamps etc. weighs 12.5 kg. The sturdy 3.4" focuser comes with a 360° rotator with dials and a viewfinder shoe. M86, M68, M54 and M48 camera adapters are also included, and the M48 adapter has an M48 female thread for the Installation of 2" filters.

The back focus is always measured with the draw tube completely retracted:

♦ 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


 
Opening: 130mm
Focal length: 1000mm
Aperture ratio: f/7.7
Lens: Four-lens apo with air gap, consisting of a triplet (including two ED lenses) and a single element
Image circle: 60 mm
Eyepiece connectors: 2", 1.25"
Eyepiece focuser: 3.4" rack and pinion focuser with reduction, max. load capacity 8 kg
Focusing distance: 95mm
Visual back focus with the focuser fully retracted: 148.5 mm (from the end of the 2" eyepiece holder)
Rear threads: M86x1 external thread, M68×1 external thread, M54×0.75 external thread, M48×0.75 external thread
Rear filter adapter: M54×0.75-M48×0.75 (M48×0.75 filter thread inside)
Photographic back focus from the base with the focuser fully retracted: 186 mm (from thread M86×1), 156 mm (from thread M68×1), 136 mm (from thread M54×0.75), 116 mm (from thread M48×0 .75)
Dew cap diameter: 169mm front, 162mm rear
Tube diameter: 146 mm
Total length with 1.25" mount: 842.5 mm / 889.5 mm (dew cap retracted / fully extended)
Total length with four-piece adapter: 1011.5 mm / 1061.5 mm (dew cap retracted / fully extended)
Seeker Base: Vixen-type Seeker Shoe
Connection of the mount: Prism rail according to Losmandy standard
Net Weight: 10.2kg
Gross weight: 12.5kg


♦ FF130 OTA with adapter M86 to 2"
♦ Adapter 2" to 1.25"
♦ Pair of pipe clamps
♦ Handle
♦ Prism rail according to Losmandy standard, 300 mm
♦ 4 piece photo adapter set
♦ User manual (English)
♦ Transport case