R5 detailed lens testing of RF 100-500 f4.5-7.1 vs. RF 800 f11, with & without RF 1.4x TC, for super-telephoto use.

[AlanF]

I couldn't see where you mentioned the camera, which for me was an R5. I suppose I could have got more pixels on it with the M6-II but it was hopeless trying to focus it. With the R5 I could crank the ISO, manually focus, then drop back down and take the picture.

The details are in the link you replied to and quoted a few posts above: https://www.canonrumors.com/forum/t...-100-500mm-rf-800mm-and-ef-400mm-do-ii.40550/ It's an R5.

 

[EricN]

Single image. You would be pushed to get anything at 800mm on the 100-400 II, just not enough pixels - 40x40, and the lens isn't sharp enough. I got this at 900mm on the 100-500mm II + RF 1.4x, f/13.
View attachment 200288

I tried it on the 100-400 II with no extender. It's just enough to recognize Jupiter. I overexposed and got what looked like 4 moons. Then I went for Saturn and again, just enough to recognize.

 

[AlanF]

I tried it on the 100-400 II with no extender. It's just enough to recognize Jupiter. I overexposed and got what looked like 4 moons. Then I went for Saturn and again, just enough to recognize.

Just went out and tried the bare 100-500mm on the R5 and Saturn. Hand held at 1/250 and iso 3200. My first ever shot of Saturn.

 

[Loswr]

Just went out and tried the bare 100-500mm on the R5 and Saturn. Hand held at 1/250 and iso 3200. My first ever shot of Saturn.

View attachment 200358

I have early access to an R3, so I mounted my bare RF 100-500 on it and took my own picture of Saturn.



That's what happens when you're stuck with a measly 24 MP.