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.