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RF 24-240mm F4-6.3 IS USM Focal Length vs F-Stop

Started Aug 14, 2019 | Discussions thread
diness Veteran Member • Posts: 3,758
Re: F-Stops and Focal Lengths...

WSteveP wrote:

Steve Lindqvist wrote:

Can anyone tell which aperture is usable at which focal length? Or to put it another way, up to what focal length do I have f-stop 4?

F/4 @ 24mm

f/4.5 @ 27mm

f/5 @ 44mm

f/5.6 @ 70mm

f/6.3 @ 109mm

From this youTube video. https://www.youtube.com/watch?v=9HLyXO8UxbE

Hmm, those are not as good as I hoped but I guess are expected.  It’s a full stop slower than the 24-105 from 70mm and up and is only f4 for 3mm

 diness's gear list:diness's gear list
Canon EOS R Canon EF 135mm F2L USM Canon RF 35mm F1.8 IS STM Macro Canon RF 24-105mm F4L IS USM
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