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How good is the RF 100-400 for Sports?

Started Feb 25, 2022 | Questions thread
John Sheehy Forum Pro • Posts: 26,688
Re: How good is the RF 100-400 for Sports?

JustUs7 wrote:

I just picked up the 100-400 and plan to use it for my son’s soccer games. But not indoor sports. The USM focusing motor is blazing fast and almost silent. For a zoom telephoto at that price it’s pretty incredible and the stabilization is great even without IBIS on the RP.

It may be BETTER on the RP without the IBIS, for most shooting of distant things at significant shutter speeds. The IBIS on the R5 is great if you are using an OIS and are also very close to the subject (X/Y translation) or the shutter speed is so slow that the camera can "roll" a little during the exposure, but these 3 axes really need no correction when shooting at a distance and the camera is operated from a stable base (shooting from a moving vehicle or vibrating platform may mostly benefit from X/Y correction, even for distant subjects). The fact of the matter is, added IBIS is NOTHING like adding more rocks to a bag hanging from a tripod. Added IBIS does not "dampen vibration more"; it REPRODUCES it in the opposite direction to cancel it out in each axis, with a very slight lag and an imperfect path, so it always ADDs some blur, even if it is mostly reducing blur. If there is nothing for it to reduce in a given axis, it may actually only ADD blur in that axis. I think that Canon is screwing R5 and R6 users over by not allowing OIS while IBIS is disabled.

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Beware of correct answers to wrong questions.
John
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