Brand: ZWO

ZWO FF 65 APO Refractor Telescope (ZWO-FF65-APO)

ZWO FF65-APO

Brand: ZWO

ZWO FF 65 APO Refractor Telescope (ZWO-FF65-APO)

ZWO FF65-APO

The new ZWO APO's are fantastic mid-focal length refractors. The quintuplet design is a modified petzval that will give nice wide views with pinpoint stars and flat corners. Super versatile with the matched reducer.
  • Aperture: 65mm
  • Focal Length: 416mm
  • F/6.4
  • Quintuplet air-spaced APO design with two elements of ED glass
  • The OTA weights a mere 2kg (4.4lbs) and with tube rings only 2.8kg (6.2lbs)
  • No need to calculate back focus
  • Small and round stars with a central RMS radius of 2.5um
  • Various adapter -- M68/M54/M48
  • Dual speed (1:10) focuser--Support both fine and coarse adjustment
  • Self-flattening design--No need for a separate field flattener
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Why We Love It Full Details What Can I See? What's in the Box? Specifications Reviews and Questions Articles, Videos, Software, Links

Why we love the ZWO FF 65 APO Refractor Telescope (ZWO-FF65-APO)

We love refractors, especially nice flat APO's that give you some wiggle room on your backfocus measurement. These do exactly that, all while offering a massive imaging circle that supports full frame cameras.

ZWO refractors use a modified/modernized petzval designs that give you nice flat views with sharp stars all the way to the corners. The scope has a dedicated reducer available for it that converts it down from a mid-focal length to a short focal length scope.

Theres a lot to love here.

Product Description

ZWO FF65 APO Astronomical telescope

The ZWO FF65 APO is a refractive astrograph with the 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 your time, allowing you to pay more attention to the image shooting itself.

The FF65 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 2kg, and the full package with tube rings and other accessories weighs 2.8kg. It has an aperture of 65mm. The focal ratio is f/6.4 and focal length is 416mm. Instead of the quadruplet structure of other ZWO FF APO telescopes, the FF65 APO is a quintuplet with two ED glasses which offers excellent control of chromatic and other aberrations.

The FF65 APO supports the full-frame imaging circle and has a fine spot diagram with tiny distortions of the peripheral stars. The 2.5" rigid focuser comes with a new-type 360 degree rotator with scales and a finder base. M68, M54, and M48 camera adapters are also attached, and the M48 adapter has a 2" female thread for installing filters.

Quintuplet air-spaced APO

FF65 APO is a quintuplet with two ED glasses which offers excellent control of chromatic and other aberrations

44mm image circle

FF65 APO supports full frame cameras, such as AS16200, which gives you a larger field of view. The stars are small and round with a central RMS radius of 2.5um.

Support for full frame cameras

Self-flattening design

No need for a separate field flattener, FF65 APO 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.

Easy-to-use Design

Extension-type hood

ZWO FF65 APO is equipped with a telescopic lens hood, a high-quality CNC machined and painted tube. The lens hood can be fixed with thumb screws to avoiding from sliding.

Detachable tube ring

The telescope' s tube ring can be easily detached and re-installed in seconds.

Various adapters

The FF65 APO also features three different threaded connections for connecting a camera or accessories: M48, M54, and M68. The M48 adapter features a female thread inside for attaching 2" filters.

Coarse & fine focus adjustment

The ZWO FF65 APO features a large 2.5" rack and pinion focuser that is directly compatible with the ZWO EAF without the need for additional adapters. In front of the focuser is a 360-degree rotator for easily dialing in the framing of your deep sky.

What can I see with a ZWO FF 65 APO Refractor Telescope (ZWO-FF65-APO)?

Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.

Jupiter with

25mm Eyepiece - 17x Magnification

(Sold Separately)

Jupiter with

10mm Eyepiece - 42x Magnification

Sold Separately

Jupiter with

5mm Eyepiece - 83x Magnification

Sold Separately

Moon with 25mm Eyepiece

17x Magnification

(Sold Separately)

Moon with 10mm Eyepiece

42x Magnification

Sold Separately

Moon with 5mm Eyepiece

83x Magnification

Sold Separately

Andromeda with 36mm Eyepiece

12x Magnification

Sold Separately

Andromeda with 25mm Eyepiece

17x Magnification

(Sold Separately)

Andromeda with 10mm Eyepiece

42x Magnification

Sold Separately

What's in the Box

  • FF65 APO OTA
  • Vixen dovetail plate
  • A set of 3-peice photographic adapters
  • Manual

Specifications

Aperture size 65mm
Focal Length 416mm
Focal Ratio f/6.4
Observing mode focal length 121mm
Net Weight 2kg
Gross Weight 2.8kg
Image Circle 44mm
Objective Lens Quintuplet air-spaced APO (including two ED glass)
Imaging Mode 76mm (form the base of the M48x0.75 make thread)
105mm (from the base of the M54x0.75 male thread)
130mm (from the base of the M86x1 male thread
Read-end thread type M68x1-M54x0.75
M54x0.75-M54x0.75
M54x0.75-M48x0.75
(M48x0.75 filter thread inside)
Total Length 328mm (including 1.25" eyepiece holder and dew shield contracted)
360mm (including the 3-piece adapter and dew shield contracted)
388mm (including 1.25" eyepiece holder and dew shield fully stretched)
420mm (including the 3-piece adapter and dew shield fully stretched)
Read end of the 3-piece photographic adapters M48x0.75

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