What Sirui showed at IBC 2026
Sirui brought two new full-frame autofocus primes to the IBC 2026 show floor in Amsterdam: an ultra-wide 15mm f/1.6 and a fast standard 24mm f/1.4, both for Sony E and Leica L-mount, with the 15mm going to L-mount later in the launch window (CineD walkthrough).
CineD filmed pre-production samples on the stand. Both lenses are part of Sirui's existing Aurora series and slot in alongside the 35mm f/1.4 and 85mm f/1.4 primes that have already shipped for Sony E and L-Mount.
What we know about the specs
Sirui has not published final spec sheets for either lens yet. From the CineD walkthrough and Photo Rumors coverage, here's what is confirmed:
- 15mm f/1.6 — weighs around 550 g, takes 77mm front filters (the only one in the family with the larger thread), STM stepping-motor autofocus, full-frame coverage (Photographytalk).
- 24mm f/1.4 — around 500 g, 62mm filter thread, STM autofocus, full-frame coverage.
- Both will be available in Sony E first, with L-mount versions planned. The L-mount rollout pattern on the existing Aurora 35mm and 85mm suggests Sirui is following a similar staggered release.
- Sirui's Sonny Liu told Photographytalk to expect $500–$600 per lens. That's an estimate from the show floor, not final MSRP.
The 77mm thread on the 15mm is the standout spec. Most ultra-wides in this price range are 67mm or smaller, and a 77mm thread means you can actually use standard 100mm-square filter holders, screw-in NDs, and circular polarisers without a step-up ring. That is unusual at the price point.
Why a 15mm f/1.6 matters
Full-frame 15mm f/1.6 autofocus is a fairly empty corner of the market. The closest peer is the Sigma 14mm f/1.8 DG DN Art, which is a much bigger and more expensive lens. Sony's own FE 14mm f/1.8 GM also lists at $1,600 and weighs about the same as a 70-200mm f/2.8.
A 15mm f/1.6 is, on paper, a strong astro / landscape / architecture prime. I've shot astro on my GH7 with the 12-40mm f/2.8 PRO II at 12mm, and going to 15mm f/1.6 on a full-frame body is roughly a stop faster and slightly tighter — interesting for handheld aurora-style work, but it depends on how Sirui handles coma and astigmatism wide open, which I haven't tested.
The 24mm f/1.4 is more conventional. Sigma, Samyang, and Tamron already have full-frame 24mm f/1.4 or f/1.8 options in this price band. Sirui's pitch here is size and weight — about 500 g for a full-frame 24mm f/1.4 STM is on the lighter end.
What we don't know yet
Sirui did not announce final pricing, release dates, or shipping schedules. Photo Rumors says the company expects official news in the next two months, but no specific dates.
A few things I'd want to see before forming a real opinion:
- AF speed and accuracy — STM on a fast 15mm is fine for stills; whether it keeps up with Sony A7 IV / A7 V subject detection at f/1.6 is unproven.
- Optical performance wide open — Sirui's existing Aurora 35mm f/1.4 is decent but not class-leading. The 15mm f/1.6 is harder to design, and that is the one I'd want to test before buying.
- Weather sealing — Aurora primes so far are not heavily sealed. If the 15mm is for landscape / astro it doesn't need to be sealed, but for the 24mm it is a question.
Wrap
If Sirui hits the $500–$600 estimate, the 15mm f/1.6 will be one of the most affordable full-frame ultra-wide f/1.6 autofocus primes on the market, and the only one with a 77mm filter thread under $1,000. The 24mm f/1.4 is more crowded, but the weight story is real.
Both are pre-production for now. Wait for final spec sheets, MTF charts, and ideally a hands-on before pulling the trigger.
— Leo