Fujifilm X-T4 Dynamic Range Data (vs X-T3, X-Pro3)

Photons to Photos has published its Fujifilm X-T4 dynamic range measurement data.

The Fujifilm X-T4 basically performs identical to the X-T3. The Fujifilm X-Pro3 seems to be superior, but as Blill Claff from PTP explained to us:

The X-Pro3 appears to have improved PDR but it is an illusion.

It’s well known that Fuji implements the ISO setting in an unusual way.
In this case they have given ISO 320 to ISO 12800 an addition 1 stop boost.

Fuji uses a proprietary Exif tag called “Raw Exposure Bias” to indicate how much they have shifted the raw data from “standard”.

Adjusted in Excel for Raw Exposure Bias we see that the X-Pro3 and X-T3 are essentially identical. (They shift to dual conversion gain at a slightly different point).

You can access the chart here.

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Sigma and Samyang Fujifilm X Mount Autofocus Lenses Reviews

Since Fujifilm opened its lens protocols to third party manufacturers, lots have happened rather quickly in terms of autofocus lenses for the X system.

So today I decided to dedicate a roundup to the latest X mount autofocus additions to the system, the Samyang 12mm f/2.0 AF and the Sigma X mount trinity.

Overall I can say that none can match the very latest releases coming from Fujifilm (with the XF56mmF1.2 getting an overall performance boost in 2022, too).

But it is also true that price matters and the new third party AF lenses definitely offer a fine performance for the price.

X Mount AF Roundup

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DPRTV: Sigma X Mount Lenses, Better than Fujifilm Primes?

When Sigma launched their new Fujifilm X mount trinity, we had a huge live blog here on FujiRumors, where we could see that these are very fine lenses.

Down below a summary in case you are in a hurry and can’t watch the video right now (plus a few personal notes).

Video Summary

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Fujifilm GFX Roundup: Don’t Call GFX50SII Cheap, GFX50SII vs GFX100S, GF80mmF1.7 and GF35-70 Reviews, Medium Format vs Sony APS-C and More

High time to catch up with a massive Fujifilm GFX roundup.

We will mostly cover the Fujifilm GFX100S, GFX50SII, GF35-70mm and GF80mmF1.7, but there is also much more, from unfair comparisons APS-C vs Medium Format to technical tests by Jim Kasson and more.

GFX Gear – Buy within April 3 and submit your claim by May 3

GFX Roundup

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C. Frost XF 18mmF1.4 Review: “This Lens Must Have Traveled Back in Time from Some Technological Advanced Future”

image courtesy: FujiRumors ;) - background image taken with X-E3 at 18mm (using XF18-55) in Orvieto (Umbria- Italy)
image courtesy: FujiRumors ;) – background image taken with X-E3 at 18mm (using XF18-55) in Orvieto (Umbria- Italy)

Christopher Frost reviews the XF18mmF1.4 R LM WR and he seems to be moderately satisfied with the performance of this lens ;).

In short:

  • gorgeous built quality second to none
  • manual focus turn smoothly but responds jerky
  • fast autofocus and completely silent
  • very small lens for such a well built and fast lens
  • spectacular sharpness all over the frame from center to corner even at f/1.4
  • one of the sharpest APS-C lenses he has ever seen. What an achievement by Fujifilm
  • negligible distortion
  • at f/1.4 strong vignetting
  • close up image quality at f/1.4 is excellent
  • almost no coma smearing
  • bokeh looks lovely and smooth
  • even at f/1.4 no real chromatic aberration, Fuji performed some magic trick
  • he feels this lens fell from a space ship or has been transported back in time from some technological advanced future
  • it is virtually perfect
  • much better IQ than the XF16mmF1.4
  • stellar optic and highly recommended

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