TL;DR: Highkey recommend the Sigma 56mm f/1.4 DC DN Contemporary for Sony E-mount. It’s basically the gold standard for APS-C portraits and fits ur budget perfectly. For your situation, I would suggest the Sigma 56mm. Honestly, I'm really happy with how it pairs with the FX30. Since you need snappy AF for video, the stepper motor in this lens is basically silent and works well with the camera's tracking system. I think the weight is only around 280g? So it wont be too heavy on ur rig. I mean, I'm still kinda new to this but the f/1.4 aperture gives such creamy bokeh for photography. I looked at the Viltrox AF 56mm f/1.4 E for Sony E-mount too cuz it's cheaper, but the Sigma specs just seem better for sharpness. It’s a solid choice for under $400 tbh. Gl with the new lens tho!

sooo, for your situation, i've spent way too much time geeking out over the technical specs for this setup. the fx30 sensor is incredible but it can be picky with AF tracking. here's my breakdown of the best options under $400: * Sigma 56mm f/1.4 DC DN Contemporary for Sony E: honestly, i'm super satisfied with this. the stepping motor is nearly silent and the micro-contrast is top-tier. it's basically the gold standard for video work on APS-C right now.
* Viltrox AF 56mm f/1.4 E: i mean it's solid for the price, but you'll see some chromatic aberration wide open. the AF is snappy but i've noticed it can pulse a tiny bit in low light compared to the sigma glass.
* Sony E 50mm f/1.8 OSS: it's older, but having that Optical SteadyShot definitely helps smooth out handheld footage when ur not using a gimbal. anyway, if ur doing mostly video, the sigma is the clear winner for AF reliability... good luck! 👍

Jumping in here to offer a slightly different take! While everyone is pushing the Sigma, I think the real DIY win for a budget FX30 setup is actually the Viltrox AF 56mm f/1.4 E. Here is why I think this is the superior route for those who like to tinker with their gear:

• Firmware stuff: It has a built-in micro-USB port on the mount. Fantastic for flashing manual updates to fix AF jitters on the FX30 yourself without sending it away. I love having that control!
• Rigging: Pairs way better with a SmallRig Mini Follow Focus 3010B than the Sigma does imo. The gear rings fit better for when you wanna do manual pulls.
• Savings: Usually under $300. Basically leaves you extra cash to grab a K&F Concept 52mm Variable ND Filter so you can actually shoot wide open in daylight. Doing your own exposure control is huge! Honestly, dont sleep on the manual update process. Its amazing how much better the eye-tracking gets after a quick patch. It feels way more professional when you calibrate your own kit like that.

yo, congrats on picking up the fx30!! it's an absolute beast for the price. honestly, i get why everyone is hyped on the sigma, but i'd actually suggest a different approach because of how the fx30 is designed to be used. not to disagree, but the Sigma 56mm f/1.4 DC DN Contemporary for Sony E-mount lacks a physical aperture ring. since youre shooting on a cine-line body, having tactile iris control is highkey important for a fast workflow. also, that lens has some noticeable focus breathing which can be kinda distracting for narrative video work. sooo, here’s why i think the Viltrox AF 56mm f/1.4 E Lens for Sony E-mount is actually a better fit for a budget rig: 1. **Physical Aperture Ring**: basically allows for smooth, clickless iris pulls. it feels way more natural on the fx30 than using the tiny scroll wheels on the body.
2. **Internal Focusing**: it uses an STM motor that’s super quiet. i’ve found the eye-AF tracking on the fx30 stays locked on perfectly even at f/1.4, which is impressive for a third-party lens.
3. **The Value Factor**: it’s significantly cheaper than the sigma. with the money saved, you can grab something like a Tiffen 52mm Black Pro-Mist 1/4 Filter to take the digital edge off the sensor and get that dreamy, creamy look you're after. the sigma is technically sharper in the corners, but for video, the viltrox's character and features just make more sense. anyway, just my two cents! peace

yo, congrats on picking up the fx30!! it's an absolute beast for the price. honestly, i get why everyone is hyped on the sigma, but i'd actually suggest a different approach because of how the fx30 is designed to be used. not to disagree, but the Sigma 56mm f/1.4 DC DN Contemporary for Sony E-mount lacks a physical aperture ring. since youre shooting on a cine-line body, having tactile iris control is highkey important for a fast workflow. also, that lens has some noticeable focus breathing which can be kinda distracting for narrative video work. sooo, here’s why i think the Viltrox AF 56mm f/1.4 E Lens for Sony E-mount is actually a better fit for a budget rig: 1. **Physical Aperture Ring**: basically allows for smooth, clickless iris pulls. it feels way more natural on the fx30 than using the tiny scroll wheels on the body.
2. **Internal Focusing**: it uses an STM motor that’s super quiet. i’ve found the eye-AF tracking on the fx30 stays locked on perfectly even at f/1.4, which is impressive for a third-party lens.
3. **The Value Factor**: it’s significantly cheaper than the sigma. with the money saved, you can grab something like a Tiffen 52mm Black Pro-Mist 1/4 Filter to take the digital edge off the sensor and get that dreamy, creamy look you're after. the sigma is technically sharper in the corners, but for video, the viltrox's character and features just make more sense. anyway, just my two cents! peace

Ok so, I totally agree with the point about the FX30 needing a lens that actually plays nice with its specific video features. Since you already blew most of your budget, you might want to look at the DIY side of lens ownership where you handle your own firmware maintenance to keep the autofocus snappy. Instead of the more expensive options, I think these budget picks are basically the best way to go if you are comfortable doing your own updates via a computer:

• TTArtisan AF 56mm f/1.8
• Viltrox AF 56mm f/1.7 E
• Meike 50mm f/1.8 AF I have found that lenses with built-in USB-C ports on the mount are a game changer for budget setups. You can basically self-service the AF performance at home whenever Sony drops a new body update, which ensures the eye-tracking stays reliable. The TTArtisan specifically is super compact and the stepper motor is actually surprisingly quiet for narrative work. It does not have the physical aperture ring, but the money you save can go toward other rigging needs like a cage. Honestly, for a portrait look on an APS-C sensor, that 56mm focal length is just spot on.

Yep, this is the way