saw this today and figured id chime in. i used to be super paranoid about third party gear messing up my hot shoe pins... sony stuff is pricey but usually safer. if you want zero stress, check these:

• Sony HVL-F20M Compact External Flash
• Meike MK-320S Mini TTL Speedlite for Sony the sony one folds flat which is cool for carrying and turns on automatically when you flip it up. the meike is decent if youre on a budget but feels a bit plasticky, tho it gets the job done.

Had a look at the earlier tips but honestly id be a bit careful about going too cheap. If you get something that takes standard AA batteries, you might end up with a dead flash halfway through the party or worse... batteries leaking and ruining the gear if you leave them in too long. I would suggest looking at something with a dedicated lithium battery instead. I know your budget is $150, and you can easily get the Godox V350S Li-ion TTL Speedlite for Sony for that price. I've used it a ton and the reason I prefer it over the cheaper AA versions is purely about safety and peace of mind. Here are a few things to keep in mind:

• Be super careful with the mounting foot. Sony hot shoes have these tiny pins that are really fragile. If you force a cheap flash on there, you could break the camera mount.
• Lithium batteries like the one in the V350S recycle way faster. You wont be waiting forever between shots while people are actually doing stuff.
• Stick to TTL mode. It basically does the math for you so you dont have to mess with settings in the middle of a birthday. Just a pro tip... try tilting the flash head toward the ceiling. It bounces the light so people dont look all washed out and prevents the red eye thing. Just make sure the ceiling is white or youll get weird color shifts... learned that the hard way at a bar with a green ceiling once lol.

Quick reply while I have a sec! I went through a massive learning curve with my a6400 too and literally wasted money on gear that kept misfiring at the worst moments. Reliability is so important when youre shooting an actual event like a birthday! Here is what I found works best for staying within that $150 budget: 1. The Nissin i40 Compact Flash for Sony is absolutely fantastic! I love it because it has physical dials on the back. It makes everything so much easier to understand compared to digging through digital menus. 2. Another amazing choice is the LightPix Labs FlashQ Q20II. Its super tiny and the flash head actually detaches so you can hold it in your hand while the transmitter stays on the camera. It helps so much with avoiding that flat, red-eye look from the pop-up flash!

• Pro tip: check for open-box deals to save even more cash.
• Stick to name brands or well-reviewed third parties to ensure the pins wont fry your camera. Honestly, having a flash you can trust makes the whole day way more fun!

Honestly its ridiculous how Sony prices their basic accessories. Like, why is a tiny piece of plastic and a bulb nearly 200 bucks? Its such a scam. In my experience, you either pay the Sony tax for something that actually works every time, or you roll the dice with these third-party brands that have menus designed by someone who hates photographers. I have tried many over the years and the inconsistency drives me crazy. One brand will have great build quality but terrible TTL accuracy, and the next will feel like its gonna snap off your hot shoe if you look at it wrong. It is honestly a nightmare for beginners because the affordable market is just flooded with junk that stops working after three months... companies just dont care about the entry level users anymore. Before I weigh in on which brand path you should take, I need to know a bit more about the venue for the party. Is this gonna be in a house with low white ceilings or is it one of those high-ceiling rental halls? Knowing if you can actually bounce the light or if youre stuck shooting direct makes a massive difference in which system is actually worth your money.

> i need something small that wont weigh me down since i gotta carry it all day honestly i was in the same boat when i first got into the alpha system. i ended up picking up the Godox TT350S Mini Thinklite TTL Flash for Sony and ive been super satisfied with the performance. it fits perfectly on the a6400 without making it top heavy. for under 100 bucks it hits all the specs you need... specifically the TTL support which basically does the math for you so you dont have to mess with settings. i really like that it has high speed sync (hss) too and a guide number of 36 at iso 100 which is plenty for a birthday party. no complaints here at all, it works well every time i take it out. if you want something even smaller there is the Sony HVL-F20M External Flash for Multi-Interface Shoe but it lacks the tilting head that makes the godox so much better for bouncing light. stick with the godox, you wont regret it!

Gonna try this over the weekend. Will report back if it works!