Which external flash works best for the Canon EOS 90D?

Question

I finally upgraded to the 90D from my old Rebel T6 and wow the autofocus is just insane compared to what I was used to. Im super stoked because I have my cousins wedding coming up in October here in Seattle and I really want to nail those low light shots in the reception hall. But heres the thing, I tried using my old Neewer flash that I have had for years and for some reason it just keeps misfiring or totally missing the exposure when I try to use the higher burst speeds on the 90D. I thought E-TTL would just work but it feels like the communication between the camera and the flash is lagging or something and I keep getting these weird dark frames halfway through a sequence.

Im looking for something that can actually keep up with the frame rate of this body without overheating or being super slow to recycle. I definitely need High Speed Sync for some of the outdoor portraits I am planning if the sun actually decides to come out. My budget is roughly $350 max because I already spent a ton on the body and a new lens so I cant really go for the top tier Canon 600EX-RT right now.

Need fast recycle times

Reliable TTL communication

Preferably under $400

Should I just stick with a brand name like the 430EX III-RT or are the newer Godox units like the V1 or V860III actually reliable enough for a wedding environment with the 90D?

Blake · Accepted Answer

Building on the earlier suggestion, unfortunately many flashes fail because their thermal management is just garbage for high frame rates on the 90D. Youll hit a thermal limit and the recycle time will drop from 1.5 seconds to like 10 seconds right when you need it most. Honestly wouldnt trust the basic 430EX III because it lacks a lithium battery, which is basically mandatory for wedding receptions if you want consistency.

Godox V1Pro-C TTL Li-ion Flash

This has a significantly improved cooling system and an external power port that the standard V1 lacks.

Westcott FJ80 II 80Ws Speedlight

The recycle time is a consistent 1.2s at full power and the UI is much faster to navigate during a chaotic event. The 90D pushes serious data through that hotshoe. If the flash doesnt have a modern processor, its gonna lag or misfire. Ngl, those older Neewer units are basically toys for this body. Get something with a dedicated lithium cell or you will regret it halfway through the wedding.

paul.james · Answer

Caught this late, but the Yongnuo YN600EX-RT II TTL Speedlite has been my go-to for keeping things simple and safe. It's basically a budget clone of the high-end Canon stuff that still plays nice with the 90D.

Grab a cheap external battery pack for faster recycling

Stick to TTL for the reception chaos Reliability is everything when you're shooting weddings for family... you really dont want to miss those big moments.

jason.henderson · Answer

Unfortunately, older third-party flashes often struggle with the 90Ds communication. I found the Canon Speedlite 430EX III-RT disappointing for professional work because its recycle time on AAs is way too slow for bursts.

Godox V1-C Round Head Flash

Godox V860III-C TTL Li-ion Flash These lithium-powered units are far more reliable for weddings. Honestly, the V1 is excellent for HSS and recycling quickly tho.