Megadap ETZ21 Pro firmware

Firmware history

1. Version 2.04 Latest Released Dec 5, 2025 First seen Jul 24, 2026
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   1. Optimized the focusing performance of the zoom lens during​ continuous zooming, effectively improving the possible out-of-focus issue;
   2. Resolved the compatibility issue of the Viltrox AF85mm F2.0 STM ED IF lens with ZR camera bodies;
   3. Enhanced the image stabilization performance of manual lenses: For manual lenses without electronic contacts, this update optimizes their image stabilization performance in stabilization mode.

   The principle is as follows: Utilize the “Focus Ring Rotation Range” setting item in the Nikon camera menu, and match it with the actual focal length of the lens by setting the corresponding value — after the user completes the corresponding settings, the lens focal length information can be transmitted to the camera body ​through the adapter ring, realizing the coordinated work of the image stabilization function.

   The specific operation steps are as follows: Enter the camera menu, select ” CUSTOM SETTINGS MENU” – “f Controls” – “f10 Focus Ring Rotation Range” in sequence.

   By setting the value corresponding to the focal length, the image stabilization performance will be significantly optimized.

   The corresponding values are as follows: Non-linear = 50mm 90° ≤ 14mm 120° = 20mm 150° = 25mm 180° = 30mm 210° = 35mm 240° = 40mm 270° = 45mm 300° = 60mm 330° = 70mm 360° = 80mm 540° = 85mm 720° = 95mm More ≥ 105mm

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2. Version 2.03 Released Nov 13, 2025 First seen Jul 24, 2026
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   1. Optimize the AF performance of be​low lenses LAOWA FFII 10mm F2.8 C&D-Dreamer LAOWA FFII 12mm F2.8 C&D-​Drmamer LAOWA AF FF200mm F2.0 C-Dreamer MEKE 85mm F1.8 MEKE 85mm F1.4 FF STM
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3. Version 2.02 Released Oct 23, 2025 First seen Jul 24, 2026
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   1. Improve compatibil​ity with Sony 1.4x and 2x Teleconverters.
   2. Improve co​mpatibility of some Sony and 3rd party lenses.
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4. Version 2.01 Released Aug 23, 2025 First seen Jul 24, 2026
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   1. Improve com​patibility ​with Zeiss Batis Lenses
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5. Version 2.0 Released Aug 1, 2025 First seen Jul 24, 2026
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   Improve compa​tibility with Nikon Z8 3.0, 3.01 firmware Improve compatibility of old Sony E mount lenses Improve compatibility of stacking 3rd party ​adapters (including but not limited to LA-EA4, LA-EA3 and MC11)

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6. Version 1.42 Released Jul 5, 2025 First seen Jul 24, 2026
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   1. Resolve Nikon Z8 3.0 Firmware compatibil​ity issue Remarks: If you have already updated your camera firmware to 3.0, you will have to downgrade it to v2.1 for updating the adapter ​firmware. OR you may use another Nikon cameras to update the adapter firmware first. Then use the adapter on the Z8.
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7. Version 1.38 Released Mar 12, 2025 First seen Jul 24, 2026
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   1. Improve com​patibility with Vilt​rox 28mm f/4.5 AF Lens
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8. Version 1.37 Released Jul 6, 2024 First seen Jul 24, 2026
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   1. OptimizE the focus flow of the Sony 55m​m F1.8, and optimized the focus speed.
   2. Optimize the focus fluency of Tamron​ FE 28-200mm F2.8-5.6 at the 200mm end, optimize the focus speed.
   3. Resolve some compatibility issues on video AF.
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9. Version 1.34 Released Feb 19, 2024 First seen Jul 24, 2026
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   1. Solve the problem that the ​transfer of SONY FE PZ16 – 35G F4.0 electric zoom toggles is not valid.
   2. Solve the problem that SONY 70-200GMii can not automatically focus after manual zoom.

   Improve ​the overall stability of the use of couplings.

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10. Version 1.33 Released Jan 3, 2024 First seen Jul 24, 2026
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    1. Improve battery draining issue when used​ with certain lenses
    2. Improve focusing performance of telephoto lenses e.g. Sony FE 3​00mm f/2.8 and 70-200mm FE II, on the telephoto end
    3. Improve overall adapter stability
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11. Version 1.26 Released Sep 10, 2023 First seen Jul 24, 2026
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    Compatible with three brands of lenses: Vitrox, Meike, and Yongnuo.

    Improved the efficiency of low-light focusing.

    Targetedly optimized the focus performance of Sigma 14mm F1.4.

    Ta​rgetedly optimized the focusing performance of Tamron 28-75mm F2.8 G2, correcting the problem that the focus ring is unavailable at MF and the aperture no longer shrinks when it is smaller than F8.

    Target​ed optimization of Sony 16-35 F4PZ, correcting the problem that the electric zoom cannot be used.

    Targetedly optimized the focus performance of Sony 90mm 2.8 macro.

    Improved the overall focusing stability of the adapter.

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12. Version 1.23 Released Aug 8, 2023 First seen Jul 24, 2026
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    Continuous shooting slows down when the aperture is fully open.

    Some Tamron lenses cause the screen to flicker.

    Sigma DGDN lens focuses too slowly.

    Large zoom such as Tamron ​28-200 and other lenses with long-focus end focusing performance.

    Exposure difference between pictures during high-speed continuous shooting.

    Focusing performance of ultra-large aperture lenses, such as Sony FE50 1.2GM at full aperture.

    The aperture display of Zeiss Loxia lens and ​Voigtlander VE lens is wrong.

    When the lens aperture is smaller than F5.6, the first picture freezes during high-speed continuous shooting.

    Optimization and use of lens travel buttons.

    Optimization and use of lens custom buttons.

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