Yo, I gotta say, the Sigma 23mm f/1.4 DC DN Contemporary is the absolute winner here! I was shooting a short in a dim pub last year with the FX30 and this lens literally saved the production. On that Super 35 sensor, 23mm gives you roughly a 34.5mm field of view... basically that iconic 35mm look everyone loves for cinema. The technical side of this lens is just insane for the price point. You get that 1.4 aperture which is a total lifesaver for gritty low light stuff. I remember filming wide open at night in an alley, the bokeh was so creamy but the subject stayed tack sharp. Seriously, the contrast it maintains even when youre fighting harsh streetlights is amazing! The Sony 15mm is cool but way too wide for a general A-cam look imo. It starts to get that distortion on faces that makes people look weird if youre too close. The Sigma stays true to the proportions. I spent weeks obsessing over MTF charts before buying it and the corner sharpness even at 1.4 is just fantastic. It feels substantial too, not like some of those cheap plastic primes. For under 700 bucks? Best money you will spend. TL;DR: Grab the Sigma 23mm f/1.4 DC DN Contemporary. It gives you that 35mm full frame equivalent focal length which is basically the gold standard for cinematic storytelling and the f/1.4 will absolutely crush those London night shoots.

@Reply #1 - good point! I usually play it safe with the Sony E 35mm f1.8 OSS.

• super reliable
• fits budget
• has built-in oss Honestly, its a solid choice for doc work.