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This Fantastic 35mm Lens Has a Major Flaw

6.1K views· 118 likes· 5:13· Jan 21, 2026

🛍️ Products Mentioned (2)

#sirui #sirui35mm #LeicaSL3 #LumixS1RII Save 5% on the Sirui Aurora 35mm f1.4 using the discount code: Bobby5 https://bit.ly/4sW1e18 RocknRoll Black Mamba Strap: https://bit.ly/45mzJnf The Sirui Aurora 35mm f/1.4 is Sirui's first entry into the L-Mount Alliance, and on paper, it looks like a winner. It offers fantastic optics, great character, and a fast aperture at an aggressive price point. But after testing it on the Leica SL3 and Panasonic Lumix S1RII, I found some significant performance issues you need to know about before you buy—especially if you are an SL3 user on firmware 4.0. In this review, I break down the image quality, the build, and the autofocus glitches that are currently holding this lens back. TIMESTAMPS 00:00 - Intro: The "Almost Perfect" Lens? 00:16 - Transparency (Not a Paid Review) 00:29 - Optical Performance & Sharpness 01:13 - Bokeh, Character & Rendering 01:34 - Comparison: Sirui vs. Lumix/Leica/Sigma 01:54 - Quick Shoutout: Rock & Roll Straps 02:17 - The Surprise: Autofocus Issues Leica SL3 03:05 - Does it work better on Lumix S1RII? 03:40 - Verdict: Wait for Firmware? 04:02 - The Design Oddity: 62mm Filter Thread 04:49 - Final Conclusion

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