Greg7579 wrote: gdanmitchell wrote: snapsy wrote:
Why does a leaf shutter mitigate the absense of IBIS? IBIS isn't design to handle the frequencies induced by shutter vibration - in fact shutter vibration is known to interfere with some stabilization implementations. IBIS is designed to reduce hand-holding motion, ie frequencies of human cyclical movements. Also, an EFCS is effective at eliminating shutter vibration.
You are correct that “shutter slap” and the vibrations/motion from hand-holding a camera are very different things.
Shutter slap is generally an issue when the camera is on the tripod and all other sources of vibration and motion blur have been eliminated — it is the one remaining issue (in most cases) that can be controlled. In the old days that was done with mirror lockup, but for the past decade or more as mirrorless cameras have taken over, EFCS has essentially eliminated it.
For handheld photography — which I’d wager is how this camera will mostly be used — shutter shock is not a significant issue and the real concern is motion produced by hand holding the camera. That is what IBIS deals with. (IBIS doesn’t really do much for shutter slap.) If one promise of the 100MP miniMF sensor is that it captures finer detail, then camera stability becomes rather important to realizing that potential benefit.
I suspect that the main benefit of the leaf shutter in this fixed lens camera is that it helped keep the camera/lens assembly as small as possible. (A secondary benefit for a few users — but probably not your typical buyer of this camera — has to do with flash sync.)
Dan, I know what you are getting at, but I disagree a bit here on this take.... Shutter shock with GFX is real and we avoid it by shooting on EFCS. We have been talking about this for 6 years and it is generally accepted practice that we all shoot EFCS on GFX cameras to avoid the shock wave that rips your arms off while holding a GFX camera set on standard mechanical shutter and the huge explosion that occurs at trigger pull when not on ES or EFCS.
Plus, as an old infantry soldier that has been in combat, I hit the ground and start screaming "incoming!" every time I accidently shoot an image not on EFCS. Boom!!!! Yes, it matters. 💥💥💥💥💣💣💣💣
When Fuji was first developing GFX, the early shutter shock waves generating from the test facility ripped through Tokyo and measured 3.2 on the Seismic scale. So, they developed EFCS. Genius!
My point is a bit subtler than challenging the fact that "shutter shock...is real." It is real, and the more mass that is moved when a focal plane shutter is triggered, the more effect it can have, all else being equal. (As always, all else is never equal, but I digress...)
It is the notion that using a leaf shutter somehow compensates for excluding IBIS (or lens IS) from the camera that doesn't quite pass the test.
Yes, vibration from the shutter is decreased (though not eliminated) by using a leaf shutter instead of a focal plane shutter. And in tripod-based photography where all other sources of vibration can be controlled/eliminated, it is useful to control that last remaining source of vibration. (That's the reason for old school mirror lockup, and fore more modern EFCS.)
But leaves unaddressed the far more consequential of blur-producing camera motion when shooting handheld, namely our inability to hold a camera with perfect steadiness even in ideal circumstances. That is what IBIS addresses, and it remains undressed here.
I'm not claiming that one can't make photographs using a camera without IBIS. I used such cameras for decades, most recently the XPro2 that I used for street photography before moving to the XT5.
But today IBIS is available and rapidly becoming a standard feature on modern cameras, rather than some sort of exotic add-on, and one that helps a lot in many real world photography situations. That's why Fujifilm is putting it in pretty much every other camera that they make these days...
In any case, looking at this question may at least help some people to better understand the sources of vibration/motion induced blur and the various ways that they can be controlled.
Mar 20, 2025 at 12:01 PM
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