ZWO FF80 APO Telescope


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The New ZWO FF80 APO refractor telescope

600mm focal length


44mm Image circle

The ZWO FF80 APO is a refractive astrograph with a powerful flatfield optical design which saves you from the expensive cost of a field flattener. It eliminates the trouble of calculating the back focus distance of the flattener and connecting various accessories to achieve that distance. You can just connect any possible accessories you need. As long as the target is focused, the whole optical system is perfect for imaging. This makes the whole setting up process much more convenient, and saves you time, allowing you to pay more attention to the image shooting itself.

The ZWO FF80 APO is also a nice choice for your visual observation. It fits diagonals as well as various eyepieces and can achieve a perfect focus, and can even be used to observe planets with a super-high magnification eyepiece.

The whole design of the telescope is compact and lightweight. The OTA weighs only 3.9kg, and the full package with tube rings and other accessories weighs 4.7kg. It has an aperture of 80mm. The focal ratio is f/7.5 and the focal length is 600mm.

The ZWO FF80 APO adopts a 3+1 quadruplet lens structure which contains two pieces of ED glass that can effectively reduce chromatic aberration and enhance clarity and sharpness. It supports the full-frame imaging circle and has a fine spot diagram with tiny distortions of the peripheral stars. The 3″  rigid focuser comes with a new-type 360°rotator with scales and a finder base. M76, M68, M54, and M48 camera adapters are also attached, and the M48 adapter has a 2” female thread for installing filters.

ZWO FF80 APO  Main Features

Quadruplet air-spaced APO design  – No need to calculate back focus

Small and round stars  –   with a central RMS radius of 3um

Various adapters  –  M76/ M68/ M54/ M48

 Dual speed (1:10) focuser  –  Support both fine and coarse adjustment

No need for a separate field flattener  –  Self-flattening design

Supports full-frame cameras –  Produces a 44mm image circle

Focal reducer – 

Aperture  80mm
Focal Length 600mm
Focal Ratio f/7.5
Image Circle 44mm
Net Weight 3.9kg
Gross Weight 4.7kg
Objective Lens Quadruplet (including two ED glass elements
Rear -end thread type M76x1-M 68×1, M 68×1- M54x0.75, M54x0.75-M54x0.75, M54x0.74-M48x0.75, (M48 X0.75 filter thread inside)
Total Length 450mm (including including 1.25″ eyepiece holder as dew shield contracted)
480mm (including the 4-piece adapter as dew shield contracted)
540mm (including 1.25″ eyepiece holder as dew shield fully stretched)
570mm (including the 4-piece adapter as dew shield fully stretched)
Rear end of the 4-piece photographic adapters:  M48x0.75





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