24-70 2.8 or 28-70 2.0 or 24-105 4.0???

[Kayaker72]

What I ponder is if either of the faster lenses at 70 would crop to the 105 range with reasonably similar effective resolution with the R5.

Any thoughts or experience on this?

This is essentially what I have been doing since going from the EF 24-105 f/4 L Mk 1 to the EF 24-70 II. Never looked back. Even on the 5DIV. The IQ out of the EF 24-105 was good. But I've always preferred the IQ (contrast, sharpness, etc) from the EF 24-70 II. I do understand that the RF 24-105 is better at 105, which may change the RF conversation a bit. But, as Joel points out, you are still getting a 17-20 MP image even when cropping on the R5.

I guess if you know for sure that you are going to be cropping your images in post-production, then you might as well shoot in 1.6 crop mode and gain the smaller file size.

As a follow-up to the other thread, I just did a test in crop mode and C-RAW, and I could not fill the buffer in the R5 at 12 fps no matter how long I shot. The card was easily keeping up with the shot rate.

Great point. I have reassigned my DOF preview button to toggle between 1.6 crop mode and FF (a Joel Eade suggestion, ).

[Jonathan Huyer]

I have reassigned my DOF preview button to toggle between 1.6 crop mode and FF (a Joel Eade suggestion, ).

What a great idea -- I've now done the same. Thanks! I just wish there was a similarly quick way to switch between mechanical and electronic shutter. I have it programmed as a custom menu item, so that will have to do unless I'm missing something.

[neuroanatomist]

What a great idea -- I've now done the same. Thanks! I just wish there was a similarly quick way to switch between mechanical and electronic shutter. I have it programmed as a custom menu item, so that will have to do unless I'm missing something.

Can you set up different C# (custom) modes and use the M.Fn button to cycle through them? That’s what I do on my R3 (although for me it’s all electronic shutter with 3, 15 and 30 fps).

[Jonathan Huyer]

Can you set up different C# (custom) modes and use the M.Fn button to cycle through them? That’s what I do on my R3 (although for me it’s all electronic shutter with 3, 15 and 30 fps).

That worked! Brilliant. I've always ignored the C# modes in the past, but this is a great reason to use them. Many thanks!