Opticallimits

I'm currently testing this one.

For the MTF stuff, I had to move outside ... 24m camera to chart distance.

And yes, people were looking very weird when watching me. ;-)

Quite a fun lens, I have to say. Impractical but fun. ;-) In terms of required ISO, only the sky is the limit. LOL

Couldn't resist the urge of using a 800mm lens.....
Well that's its major selling point

Test charts @ Patreon:

https://www.patreon.com/posts/canon-rf-800mm-f-83368684