EOS R6ii, max flash sync speed is 1/200 or 1/181?

[Andy9876]

The max flash sync is usually stated as 1/200 and that's used almost everywhere in the R6ii Advanced User Guide, except on one page where it explicitly states "Maximum flash sync speed in flash photography is limited to 1/181.0 sec regardless of shutter mode".  (search for "181.0" if you have the pdf manual)

That's so specific it must be a real spec, not just an error in the manual. Is the max sync really 1/181? Why isn't it 1/200?

[kvbarkley]

It could be a typo.

But in this case, note that this limitation is in the High Frequency Anti-Flicker section, and I believe it only applies to that condition.

I don't know *why* it applies here.

[Andy9876]

Re-reading the whole High Frequency Anti-Flicker section, I think you're right.  The 1/181 sync speed only applies when the camera is in HF A-F mode and perhaps the camera needs some leeway in synchronizing to the ambient flicker frequency, and for the possible flicker speeds it finds.  Thanks.

[jrhoffman75]

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@Andy9876 wrote:

The max flash sync is usually stated as 1/200 and that's used almost everywhere in the R6ii Advanced User Guide, except on one page where it explicitly states "Maximum flash sync speed in flash photography is limited to 1/181.0 sec regardless of shutter mode".  (search for "181.0" if you have the pdf manual)

That's so specific it must be a real spec, not just an error in the manual. Is the max sync really 1/181? Why isn't it 1/200?

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EOS R6 Mark II: High-Frequency Anti-Flicker Shooting

See Caution notes at bottom of article.

[Andy9876]

Yup, that's the same as the section in the manual.  It's not wrong but finding that sentence out context from the rest of the section or explanation can be puzzling.