EF 70-200mm f2.4 II IS slows down burst mode on EOS R6, okay on EOS R7

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[p4pictures]

This does seem strange as I have that lens and an EOS R6. With the EF 70-200mm f/2.8L IS II USM fitted there is no difference in the high speed drive operation compared to using an RF lens. Make sure you have LP-E6NH batteries fitted and the icon on the LCD is showing H+ in green.

EOS R5 and EOS R6 both have some limitations at the high speed + drive mode with older EF lenses and there is a list in the manual on page 859 that shows the lenses compatible with 12fps. There it says the lens is compatible. 

However I note you typed f2.4 is your lens the f/4 version, not the f/2.8 version? If so then the EF 70-200mm f/4L IS USM does not support high speed 12fps shooting, yet the EF 70-200mm f/4L IS II USM does.

[Waddizzle]

You have not posted enough info to understand the problem.  Tell us how to reproduce your issue. Post a sample photo with EXIF data that demonstrates the issues you are experiencing.

[jrhoffman75]

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@Waddizzle wrote:

You have not posted enough info to understand the problem.  Tell us how to reproduce your issue. Post a sample photo with EXIF data that demonstrates the issues you are experiencing.

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I'm not sure EXIF info will provide any insight into burst speed.

[Waddizzle]

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@jrhoffman75 wrote:

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@Waddizzle wrote:

You have not posted enough info to understand the problem.  Tell us how to reproduce your issue. Post a sample photo with EXIF data that demonstrates the issues you are experiencing.

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I'm not sure EXIF info will provide any insight into burst speed.

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You’re correct.  That is why I asked the OP to tell us how to reproduce the issue.  We know nothing about AF settings, AF points, etc.  I figured we could start small and work up from there.

[deebatman316]

Can you provide the Full complete name of the lens in question. Canon hasn't released an EF 70-200mm f2.4 II IS lens. They've made F/2.8 & F/4 versions of lenses including IS and non-IS versions. The version 1 IS of the F/4 and the original non-IS versions DO NOT support 12 fps. The F/2.8 models the original non-IS and version 1 IS DO NOT support 12 fps. The newer variants of the F2.8 & F/4 lenses do.