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

Started Aug 14, 2019 | Discussions thread
Steve-P
Steve-P Senior Member • Posts: 1,344
Re: F-Stops and Focal Lengths...

joenj wrote:

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

As impressive as the focal range of this lens is as unimpressive are the aperture numbers at various focal lenghts. One who uses this lens must make many compromises.
I rather carry 3 lenses to cover that focal range ...

I can understand some peoples aversion to this lens for the above reasons.

I'm not that serious a photographer. The vast majority of my shots are a f/8 or f/11, so these apertures are a non-issue for me.

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 Steve-P's gear list:Steve-P's gear list
Canon EOS 90D Canon EF 70-300mm f/4-5.6 IS USM Canon EF-S 18-135mm F3.5-5.6 IS USM Tamron 18-400mm F3.5-6.3
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