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EOS R6 Mark II firmware v1.4 limits aperture range on Speedlite EL-5

Ccming
Contributor

I use Fv with auto ISO, auto aperture, auto shutter speed and ETTL flash.

before Feb, include Feb, the auto f stop can be correctly set as f2.8 automatically.

but from Mar, it always set f4 as priority, and ISO often go to 6400.

today, 2024-Aug-07, I went to a shop to try another two R6 Mark II,

what I found is, if the firmware version is 1.1, auto aperture works normal, but if the firmware version is 1.4, the auto aperture will be f4 for most of the situation, except very low light, it can be f2.8

10 REPLIES 10

Yes that's exactly how E-TTL works. It always Fill Flash when the camera is NOT set to Manual Mode. In Manual Mode its treated as Main light.

-Demetrius
Bodies: EOS 5D Mark IV
Lenses: EF Trinity, EF 85mm F/1.8 USM
Retired Gear: EOS 40D, EF 50mm F/1.8 STM & EF 70-210mm F/4
Speedlites: 420EX, 470EX-AI, 550EX & 600EX II-RT

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