Buy or wait

Wait for shipping units, unless you were already buying an FX3.

Buy now if

you were already choosing an FX3 and can absorb the step up. The FX5 sits above it for a reason: a stacked full-frame sensor, triple base ISO and internal X-OCN RAW, none of which the FX3 has. Know that a pre-order today is a place in a queue with no date on it: Sony postponed shipping on August 18 and has not published a new US date.

Wait if

you would rather not order into an open-ended delay. Sony postponed the FX5 on August 18, citing production issues, has given no new US date, and its own European stores now list October 16; as of September 17 B&H publishes no date at all and Adorama says October 15. Wait too if you shoot run-and-gun outdoors, because the FX5 has no internal ND filters and the FX6 does. Wait as well if you are buying for the headline frame rates: at launch you get 5K 60p and uncropped 4K 120p, while 5K 120p open gate and cropped 4K 240p both need the version 2 firmware that Sony dates to August 2027 or later. And wait if you want a measured dynamic-range figure before spending this much. Sony's own release states 15+ stops in S-Log3 and puts no number on Dual Gain, while launch coverage widely reports 16+ with Dual Gain on, a mode that fixes base ISO at 800 and caps you at 60p. We cannot find the 16 in anything Sony published, and nobody has measured either figure yet.

Our call as of Sep 17, 2026, based on the FX5 claims we scored and resolved. Every one is on the accuracy ledger, including the two we got wrong.