Fujifilm X-T4 Firmware 1.02 Significantly Improves IBIS but Makes Boost Mode Worse?

We just reported about how the Fujifilm X-T4 firmware 1.02 improved video autofocus performance in this dedicated article (with video comparison).

Now here is part 2 of our Fujifilm X-T4 firmware 1.02 coverage, and this time we focus on IBIS.

Down below you can see three videos. All three say that IBIS has indeed been significantly improved (and confirm our early report here).

However, kushagra K noticed that in one specific scenario, IBIS seems to be worse with firmware 1.02 compared to 1.01: Boost Mode! (that’s the mode used to emulate a tripod and should not be used when panning or moving the camera)

According to kushagra K, Boost mode now gives some wavy movements in the corners, that were not there with firmware 1.01. The Issue is more visible with wide angle lenses.

Again, mostly the feedback is very positive, but the thing with the Boost Mode has to be investigated further and, if confirmed, Fujifilm better quickly works to fix it.

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Fujifilm X-T4 IBIS Videos

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Fujifilm X-T4 firmware 1.02 vs 1.01 Video Autofocus Comparison with XF56mmF1.2 Shows Significant Improvement

Just click, and the video above starts at 5:20, hence exactly at the point, where you see the comparison

Fujifilm X-T4 FW 1.02

A few weeks ago, Fujifilm released firmware 1.02 for Fujifilm X-T4 cameras (I did update mine via Fujifilm Smartphone App, and you?).

Officially, it improves IBIS (with great results) and fixes some bugs.

There was not mention of anything autofocus related, but as FujiRumors reported here, one of the hidden improvements should be better video autofocus with DC motor driven lenses (such as the Fujinon XF56mm f/1.2, which until firmware 1.01 was a horrible lens for video AF).

Now the French channel Les Guides Fujifilm & Sony tested Fujifilm X-T4 firmware 1.02 using the XF56mmF1.2 and also compared it to firmware 1.01.

What he notices:

  • Firmware 1.01
    – many hesitations and pumping
    – not acceptable
  • Firmware 1.02
    – walking faster: wow, it reacts pretty well
    – when his subject walked slowly, it did not hesitate at all
    – pumping movements he had with firmware 1.01 are mostly gone, almost perfect
    – when his subject moves out of frame and then back in frame, the camera detects his face and does not hesitate when locking on his face
    – the focus moves more gracefully

He rightfully wonders why Fujifilm didn’t mention this big improvement on his official firmware 1.02 page, but luckily there is FujiRumors for that ;).

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The Impossible Specs Comparison: Canon EOS R5 vs Canon EOS R6 vs Fujifilm X-T4 vs Fujifilm GFX100 vs Sony A7rIV vs GFX50S

Well, it’s hard to compare Fujifilm flagship cameras to anything else, for the simple reason, that Fujifilm decided to stay out of the full frame war, and focus on the advantages that other formats like APS-C and Medium Format offer.

So, inevitably, every comparison can be called “unfair”.

For example, B&H Explora said in their dedicated Canon EOS R5 comparison article, that:

there are plenty of real advantages to medium format, which is why we aren’t daring to make a comparison with the Fujiflm GFX100, but sticking with the Fujifilm GFX 50S here.

But has that ever stopped us from making unfair comparisons? I don’t think so.

So, while waiting for the first real life reviews to hit the web, and hence the first real life comparisons, down below you can find a nude and crude specs comparison between the Fujifilm X-T4, Fujifilm GFX100, Canon EOS R5 and Canon EOS R6.

If you want the megapixel master comparison, check out the following one: GFX100 vs GFX 50S vs Canon R5 vs Sony A7rIV

Fujifilm X-T4 Firmware 1.02 Tested: This Pro Videographer is Blown Away by Improved IBIS and Wishes the Same for Fujifilm X-H1

Fellow Italian X shooter Mario (who is a professional videomaker, formely shooting Canon, then leaving Canon because he fell in love with the Fujifilm X-H1) has shared a video, where he compares the IBIS on the Fujfiilm X-T4 with firmware 1.01 vs. firmware 1.02.

Now, if you don’t understand Italian, you probably want to see the video samples, and get a summary of what he says…. well, I did it all for you down below. :)

So let me guide you through this, since I am Italian, too :).

Also, fellow German speaking X shooter Pascal shares his feedback about firmware 1.02. Luckily I am also German native speaking, but in this case, Pascal makes the video in English. I’ll include it down below.

He also says “I can’t say any issues that come from the IBIS anymore”.

IBIS TEST

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Fujifilm X-T4 Video Autofocus Tested: Can You Trust it? Settings Nightmare, Inconsistency and Which XF Lenses Are Best for It

UPDATE: I have just been contacted by FR-readers, and I have been told that the latest firmware 1.02 for Fujifilm X-T4 improved autofocus during video with older lenses. Philip’s video was recorded before that. Would be fantastic if Philip could repeat the test to verify that.

Philip Bloom wonders, can you trust the Fujifilm X-T4 autofocus for video?

In my opinion, Philip did a great job, and this video is very helpful to figure out which lenses are best for video autofocus tracking and especially which settings are best for which lens.

Before the usual video summary, for those of you, who have no time to watch it right now, I’d like to highlight a few things from the video:

  • inconsistency: Some lenses work very well and reliably (such as the XF16-55mmF2.8), other were a complete nightmare (for example XF56mmF1.2)
  • settings nightmare (AF speed + Tracking sensitivity): some settings work great on a certain lens, but use the same settings on another lens, and you get totally different results. You must hence fine tune the settings differently for each lens
  • older lenses: older lenses are clearly not designed for video autofocus. Newer lenses work better
  • pulsing & jumping: that’s an issue that occurs with many XF lenses. On some lenses you can mitigate it a lot by changing settings
  • Confusing Settings: with AF-Speed, the higher you set the number, the faster the AF speed (logical). With tracking sensitivity, the higher the number, the slower it is (not logical).
  • Eye AF: can lose eye easily, especially if you wear glasses
  • Internal vs External recording: Record externally, and you have terrible results. Better record internally for best video autofocus
  • Overall: X-T4 is a fantastic camera (in fact his favorite camera close after the GFX100) and has all the power it needs for great video AF, but it’s the lenses that are holding it back for video AF.

I feel like lots of this is something that Fujifilm could improve via firmware update, even with older lenses, and I am confident Fujifilm will.

I personally used the XF18-55mm a lot for my teaching-vlogging, and it worked well on my X-T4. And in fact the 18-55 is one of the lenses that performed best in Philip’s tests.

Down below you’ll find the summary and the video, so you can see which lens worked best and which settings he recommends.

Philip Bloom did well to highlight all this, and of course here on FujiRumors we report about it, as I believe this is valuable feedback for Fujifilm.

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The Complete Video Summary

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