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Is it normal for the burst rate to slow down when you stop down the aperture?

Started Feb 9, 2020 | Questions thread
Alastair Norcross
Alastair Norcross Veteran Member • Posts: 9,874
Re: Comparison with M6

Wintereater wrote:

I still have my M6, as well as M6II, so I just tested the M6. Here's what I found. With EF-M mount lenses (I tested the EF-M 18-55 and the Sigma EF-M 16 F1.4) I notice no slowdown from 7fps when stopping down. However, when I use EF lenses with the adapter (I tested the EF 50 F1.8STM and the EF 85 F1.8), I do notice a significant slowdown when stopping down, even a little. I would say that it slows from 7fps to around 4fps. It's certainly a big enough difference that you can hear it right away. So, from this quick test at least, with the M6 it seems to be an adapter issue (I'm using Canon adapters).

Sweet, thanks for testing it out! The M5 and M6 have pretty much the same specs so I'm surprised that you had no issues with your native EF-M glass but I did. Someone else commented about their M6 Mark II having no slowdown whatsoever so it could possibly be processor related (correlated or causation?) or some other spec.

You didn't mention it but I assume you had no slowdown on your Mark II, right?

Yes, I tested the M6II with the EF-M 32 and the adapted 85. No slowdown.

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Alastair
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