In his latest video, The Math Photographer ran a detailed sensor comparison between four premium compact cameras: the Sony RX1R III, the Leica Q3 28 mm, the Leica Q3 43 mm, and the Fujifilm GFX100 RF.

Using a precise laboratory workflow, he tested dynamic range, noise, high-ISO behavior, and exposure recovery. All shots were captured remotely through the Sony Creators App to avoid vibration, exported as JPEGs, and analyzed with a Python script measuring four metrics — Structural Similarity Index (SSI), Mean Squared Error (MSE), Peak Signal-to-Noise Ratio (PSNR), and Average Pixel Value (APV).

Results by category:

Underexposure ranking:

• 1. Leica Q3 28 mm
• 2. Sony RX1R III
• 3. Fujifilm GFX100 RF
• 4. Leica Q3 43 mm

Overexposure ranking:

• 1. Sony RX1R III
• 2. Leica Q3 43 mm
• 3. Fujifilm GFX100 RF
• 4. Leica Q3 28 mm

High ISO ranking:

• 1. Leica Q3 28 mm
• 2. Sony RX1R III
• 3. Leica Q3 43 mm
• 4. Fujifilm GFX100 RF

Conclusion: Despite being the smallest and least expensive of the group, the Sony RX1R III delivered outstanding sensor performance — often ranking second overall and first for overexposure recovery. The Leica Q3 28 mm remains a benchmark for shadow and high-ISO recovery, while the Fujifilm GFX100 RF surprisingly placed last in several categories.

The Math Photographer concludes that sensor differences among modern cameras are now marginal in real-world photography — factors like workflow, ergonomics, and brand preference matter far more. Still, the Sony RX1R III earns special praise as “a proud winner despite its size.”

The well known Australian Store DigiClub is teasing a big product launch on November 18.UPDATE it is for the DJI Osmo Action 6 :)

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Thanks Rob!

From minute 39 Sigma CEO Yamaki joined the podcast. Here are a couple of highlights:

• He doesn’t work with other manufacturers, they prefer to produce lenses in their own factory
• Sigma made no profit in past fiscal year due the increase of cost.
• Sigma 14mm f/1.4 lens is a niche lens only being produced in January and February

The Sigma 14mm FE at BHphoto (Click here).

Sidney Diongzon would like the Sony A7V to include the following new features:

• Audio-only recording mode with 32-bit float audio — allows recording just audio in-camera without video, useful for voiceovers and maintaining consistent sound without external recorders.
• Larger, higher-quality 4-inch screen — similar to the Nikon ZR display, combined with Sony’s four-axis flippy-tilt mechanism, ideally OLED or using Bravia display technology for better color and brightness.
• Built-in internal memory (64 GB–128 GB) — provides backup or emergency storage when SD cards are full or forgotten, and can be used for reference photos or videos.

I am 99,999% certain none of these will make it into the Sony A7V…but maybe on cameras coming  in 1-2 years from now this would make sense?

UPDATE: After the Canon R6III launch he posted this:

Skylum has unveiled the upcoming features of the new Luminar Fall release (Click here to see them). And don’t forget you save up to 77% on the Luminar Neo software (Click here). Add our checkout code “SAR” to get additional 10 Dollar/Euro discount!