Honestly, I had such high hopes for the Sony E 18-105mm f/4 G OSS because of that power zoom, but it was just so bulky for my vlogging setup. Unfortunately, carrying that thing around all day made my wrist hurt and the footage still looked kinda jittery since the a6400 has zero stabilization inside. Returning it felt like a total defeat. That lens was supposed to be the one-lens solution everyone raves about, but it just wasnt for me. Being someone whos always trying to save a buck, I looked into the used market instead. My latest win was grabbing a used Sony E PZ 16-50mm f/3.5-5.6 OSS for like eighty bucks. Its definitely not as good as expected when it comes to sharpness, and the low light is... well, its pretty rough lol. But for the price of a decent dinner, it has OSS and its so tiny I actually take the camera out more now. Dont sleep on the kit lens while you save up for the expensive stuff. Tried to make the Sony 20mm f/2.8 work too but its just not wide enough for vlogging unless you have really long arms.

Ive been using my a6400 for a long time now and honestly, I am so satisfied with the results once I figured out the balance. I remember my first trip vlogging with it, I thought I could just muscle through the shaky footage, but I quickly learned that the technical side of the lens choice makes or breaks the experience. It took me a few months of trial and error to really find a setup that works well for my daily carry. Here are some things I noticed from a technical perspective:

• Lens weight matters way more than you think when you are holding the camera at arms length for ten minutes straight.
• Optical stabilization is basically a requirement for this specific body if you want to avoid that headache-inducing micro-jitter.
• The 4K crop on this camera can really mess with your framing, so a wider focal length is usually safer than something tighter. Before I give my final thoughts, I wanted to ask a couple things so I can give you a better answer...
• Are you mostly gonna be filming yourself while walking around outside, or is this for a more controlled environment like a desk setup?
• Does the physical size of the lens bother you, or are you okay with a bulkier setup if it means more versatility?

Since the a6400 lacks IBIS (In-Body Image Stabilization), your lens choice basically HAS to account for camera shake. Honestly, for handheld vlogging, the Sony E 11mm f/1.8 is the clear winner. At an 11mm focal length—roughly 16.5mm full-frame equivalent—the ultra-wide FOV naturally masks micro-jitters much better than a 20mm would, and it gives you enough 'buffer' room to use electronic stabilization in post without cropping your face out lol. The Tamron 17-70mm f/2.8 Di III-A VC RXD is technically incredible because of the constant f/2.8 and the VC (Vibration Compensation), but it's a bit of a brick for long handheld sessions. If you're doing more cinematic B-roll, it’s great, but for 'run and gun' stuff? I’d actually recommend the Sony E PZ 10-20mm f/4 G as a modern alternative—it’s tiny, internal zoom means no balance shifts on a gimbal, and the AF is lightning fast. **TL;DR:** Grab the 11mm f/1.8 for talking-head shots; the distortion is minimal once the in-camera lens profile kicks in. If you need a zoom, the 10-20mm G is much more portable than the older 18-105mm.