i think the Godox V860III-C TTL Camera Flash for Canon is ur best bet! i was kinda worried about non-Canon gear but honestly it works well: • Godox V860III-C TTL Camera Flash for Canon: fast lithium battery, no complaints.
• Canon Speedlite 430EX III-RT: reliable but AAs are slow i guess?
• Godox V1-C Flash for Canon: nice soft light but maybe expensive. anyway im super happy with the V860III... gl!

Total agreement here!! Honestly, those lithium batteries are life-changing for HSS. If ur tryna stay under that $250 limit, maybe look at the Godox TT685II-C Flash for Canon too? It takes AAs, but it’s way cheaper than the V1. Use the extra cash for a Godox XPro-C TTL Wireless Flash Trigger and some Panasonic Eneloop Pro Rechargeable AA Batteries 4-Pack. Having that flash off-camera is actually what makes portraits look pro, you know? gl! 👍

ngl, as previously mentioned, the Canon Speedlite 430EX III-RT is the safest bet for a 90D, but AAs are slow. Comparing it to the Godox V1-C Flash for Canon, the V1 wins on recycle speed—that lithium battery is basically a game changer for HSS. Just be careful, third-party gear can be a bit wonky sometimes, though mine works well with no complaints. For $250, Godox is highkey the better value. gl

Like someone mentioned, sticking to the mainstream brands is the safe route, but ive been digging into the specs of some other gear lately. Been testing a few on my 90D and honestly i'm so satisfied with the performance to value ratio.

• Westcott FJ80 II Speedlight for Canon: This one is a sleeper hit. Tbh the color consistency is its best feature, staying within +/- 200K which is better than most mid-range flashes. It outputs about 76Ws and the recycle time is basically instant at 1.5 seconds on full power. The touch screen makes it so easy to adjust on the fly during a shoot.
• Nissin i60A Flash for Canon: This is my pick for a more compact setup. It has a high Guide Number of 60 but its way smaller than the bulky 600 series. It handles E-TTL II communication perfectly and I havent had a single misfire in months. Both of these work well for HSS outdoor fill light. If you really care about specs like color temp stability and thermal management, the Westcott is the winner imo... just feels more like a studio strobe in your hand.

Ok so, I totaly agree that moving the flash off-camera is the real secret to those pro portraits. But honestly, as an expert who’s seen third-party gear fail during high-stakes shoots, I’d suggest looking at how these brands handle the actual E-TTL II communication protocols. Godox is great, but there are other market players worth researching for the 90D that offer different reliability profiles. 1. Yongnuo YN600EX-RT II Wireless Flash Speedlite - This is a solid choice if you want the power of a flagship at a fraction of the cost. It’s compatible with the Canon RT radio system, which is generaly more stable and professional than some older reverse-engineered protocols. 2. Westcott FJ80 II Universal Speedlight - This is a fantastic alternative to the V1. It has a realy intuitive color touch screen and very consistent color temperature, which is often a weak point in cheaper brands. Tbh, since the 90D has such a fast burst rate, you realy need to watch the thermal protection. Some third-party units will lock you out for several minutes if they get too hot during HSS. For $250, the Yongnuo setup is realy hard to beat for raw performance. Definitly worth a look!

To add to the point above: while the previous suggestions are solid, I have to respectfully disagree with the heavy focus on expensive TTL features for a 90D. Over the years, I have tried many different setups, and I have found that a DIY approach with manual gear is often superior for someone really wanting to master indoor portraits.

• Go with Godox and you basically cannot go wrong, even if you just get their most basic manual units. Manual control forces you to actually understand the exposure triangle rather than letting the camera guess.
• Just get any manual unit from Yongnuo or a similar brand. The cost savings are huge, and you can put that money into modifiers which actually change the quality of light.
• Build your own reflectors or use cheap white boards from a craft store. In my experience, the surface area of your light source matters way more than whether your flash supports high-speed sync. I really think you will get better results by ignoring the tech specs and focusing on the manual craft. Stick to a simple manual unit from one of those big third-party brands and you will be much happier. Manual is the way to go for portraits anyway, honestly.

Can confirm