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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
Andy01 Veteran Member • Posts: 5,188
Re: Is it normal for the burst rate to slow down when you stop down the aperture?

Wintereater wrote:

I was shooting in full manual mode not aperture priority, so stopping down should not and did not change anything but the ISO which was set to auto (in any case, I was shooting at 1/1000th, so plenty fast enough to not slow the max burst rate). I also tried keeping ISO on manual as well and it still slowed down.

Bear in mind that generally higher ISO shots have larger file sizes, which may influence burst rate. So, stopping down will increase ISO (either on Auto or manually, assuming you adjusted the exposure to suit the slower aperture), which will generally increase file size.

I cannot explain why it would speed back up at f9 though ?

Do you have continuous AF (different to servo AF) turned on ? That may be trying to focus between shots even if on One Shot ?

It could be a 3rd party lens peculiarity ? Since your 15-45mm behaves differently, it may be a combination of things (like continuous AF + lens "issues" + file size).

Colin

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