ZWO FF65 APO
ZWO
ZWO FF65 APO is a 65 mm Flat-field APO refractor for wide-to-mid-field nebulae and general deep-sky imaging.
Best Current Offer
Specifications
Optics
- Optical design
- Flat-field APO refractor
- Aperture
- 65 mm
- Focal length
- 416 mm
- Focal ratio
- f/6.4
- Dawes limit
- 1.78"
- Glass / elements
- Quintuplet air-spaced APO with ED glass
Imaging
- Image circle
- 44 mm
- Camera format
- Full frame / APS-C / Micro 4/3
- Full-frame coverage
- Yes
- Back focus
- No strict flattener spacing required within focuser travel
- Corrected field
- Built-in flat field for full-frame imaging
Mechanical
- Focuser
- Dual-speed rack-and-pinion focuser
- Weight
- 2 kg
- Tube length
- 328-420 mm depending on imaging adapter and dew shield position
- Dovetail
- Vixen-style dovetail
Astrophotography Fit
Best for wide-to-mid-field nebulae and general deep-sky imaging when the mount, camera format, and correction hardware are chosen as one system.
ZWO FF65 APO sits in the telescope slot for wide-to-mid-field nebulae and general deep-sky imaging. The useful headline specs are aperture 65 mm, focal length 416 mm, f/6.4.
Camera coverage: Full frame / APS-C / Micro 4/3. Image circle: 44 mm. Back focus: No strict flattener spacing required within focuser travel.
Refractors keep the field routine calmer: no regular collimation, predictable cooldown, and a clean path to autofocus and filtered imaging. The tradeoff is aperture and reach.
Weight matters here: 2 kg. Leave payload headroom for the camera, guider, focuser, dew control, and cables instead of judging the mount by bare tube weight alone.
Best paired with
- Corrected field flattener or reducer when the design requires one
- Cooled APS-C or smaller astro cameras matched to the image circle
- Autofocus, guide scope or OAG, and a mount with comfortable payload margin
Not recommended for
- Large full-frame sensors unless the corrected field supports them
- Very small travel mounts near their realistic imaging payload limit
- Buyers expecting one telescope to be ideal for every target size
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Mile High Astronomy Mile High Astronomy | $39.95 | In stock Updated 9/20/2026 | View Offer - $39.95 |
| Telescopes.net Telescopes.net | $799.00 | In stock Updated 9/20/2026 | View Offer - $799.00 |
| Cloud Break Optics Cloud Break Optics | $999.00 | In stock Updated 9/20/2026 | View Offer - $999.00 |
| ZWO USA ZWO USA | $549.00 | Out of stock Updated 9/20/2026 | View Offer - $549.00 |
| High Point Scientific High Point Scientific | $799.00 | Out of stock Updated 9/19/2026 | View Offer - $799.00 |
| Agena AstroProducts Agena AstroProducts | $899.00 | Out of stock Updated 9/19/2026 | View Offer - $899.00 |
| Astronomics Astronomics | $899.00 | Out of stock Updated 9/20/2026 | View Offer - $899.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.