ZWO
ZWO FF70 APO Flat-Field Apochromatic Refractor
ZWO FF70 APO Flat-Field Apochromatic Refractor
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Lightweight & Compact · Designed for Both Visual Observation and Astrophotography
*Focus can be achieved within a back focus range of 32.5–82.5 mm, measured from the M54–M48 interface shoulder.
Main Features
Flexible Connectivity for Multiple Configurations
Uniqueness
- Lightweight & Compact
The ZWO FF70 APO features a 70 mm aperture and 490 mm focal length (f/7.0), offering an excellent balance between portability and performance.
The optical tube weighs just 2.5 kg, with a total system weight of 3 kg including mounting rings and dovetail plate.
- Four-Element Optical Design
The FF70 APO features a four-element, fully air-spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener.
One ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting in improved color correction and image clarity.
- 44 mm Image Circle — Full-Frame Support
With a 44 mm image circle, the FF70 APO fully supports full-frame sensors and a wide range of imaging setups.
It delivers sharp star fields with excellent edge-to-edge performance, ensuring consistent image quality across the entire frame.
- Native Flat-Field Design
The FF70 APO features a native flat-field optical design, eliminating the need for an additional field flattener.
No complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.
Convenient Design
- Coarse & fine focus adjustment
Equipped with a rigid 2.4-inch rack-and-pinion focuser, the FF70 APO offers precise control with a 1:10 coarse & fine focus adjustment mechanism.
A built-in 360° rotator at the rear allows for smooth and accurate camera angle adjustments.
- Retractable Dew Shield
The FF70 APO features a retractable dew shield, reducing overall length for improved portability.
Precision CNC machining and a high-quality painted finish, combined with an internal anti-reflection coating, help minimize stray light and enhance image contrast.
- Quick-Release Mounting Rings
The mounting rings are detachable, allowing for quick and easy setup or teardown of the telescope.
- Photography Extension Tube
The FF70 APO includes a photography extension tube with a 2-inch filter thread, along with rear adapters in M48×0.75 and M54×0.75 standards.
This allows for easy integration with a wide range of imaging accessories.
Performance
Optical Layout
Star Field Map
Product Diagram
Specifications
What’s in the box?
FF Series Telescope Comparison
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Research It
Find the product you want.
Talk to Us
Get expert guidance fast.
We Source It
Delivered within 4 weeks.
Enjoy It
Be happy with your gear.
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what we get asked most often
Are the prices all-inclusive?
Yes. The price you see is the price you'll pay. All taxes are included. Free shipping on all orders.
What's the stock status of the products on your site?
We list only in-stock items on our website that can be shipped right away. Sold out products are out of stock, so you can't place an order.
Selected products are available for Preorder, with a guaranteed delivery within 30 days or your money back.
How fast do you ship?
We process and ship all orders within two business days. Shipping time is determined by the speed of the shipping partner.
Is there a guarantee on your products?
Yes. On top of the manufacturer's warranty, we also offer a Replacement Guarantee on all online orders. In the event that the product is defective or damaged during shipping, you will receive a replacement.
Can I cancel my order?
We'll refund you 90% if you cancel before dispatch. Cancellations after dispatch are complicated. Take a look at the our Policy here
What's your return policy?
We have strict return/refund policies as a company that deals with fragile products. Casual returns are not permitted. Items that are not damaged in transit or defective cannot be returned.So please take a moment to review our Refund Policy.
Could I order something that's out of stock or not listed?
If you are interested in ordering an out-of-stock item, click the "notify me" button. You will be notified when the item is back in stock.
To source a specific product for you, our team needs more information. Specific orders will be subject to case-by-case terms and conditions.
