Lightweight & Compact · Designed for Both Visual Observation and Astrophotography
*Focus can be achieved within a back focus range of 45–75 mm, measured from the M54–M48 interface shoulder.
Main Features
Flexible Connectivity for Multiple Configurations
Uniqueness
1. Lightweight & Compact
The ZWO FF90 APO features a 90 mm aper
5.0
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Excellent telescope. I really like how the focuser allows for such precise fine tuning. Pay attention to the instructions when setting up for photography.
W
W · September 24, 2026
An excellent performer at the price; I was blown away by the resolving ability of this scope and the superbly corrected stars (I tested out to APS-C). The fine focus knob is a dream to use and the highest praise I can give this: It just works, and works well!