Megadap ETZ21 firmware

Firmware history

1. Version 3.20 Latest Released Jul 3, 2023 First seen Jul 24, 2026
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   Update from adapter ring mode firmware directly to native lens mode firmware.

   A customizable button on the Sony lens can now be used.

   Lens brand and model information av​ailable in Exif (Note* some lenses do not show brand name) Better compatibility, including the new Z8 and Z9 cameras.

   Supports in-camera lens manual correction.

   Better focus performance in some specific environments, such as dark environment focus and focu​s on solid color objects.

   High-speed continuous shooting performance is more stable, including continuous shooting speed and exposure consistency performance.

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2. Version 2.13 Released May 22, 2023 First seen Jul 24, 2026
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   Resolve Sony E 18​-55mm F3.5-5.6 OSS and old Sony lenses compatibility issue. Resolve Sony 50mm 1.2GM AF-S focusing issue. Resolve compatibility i​ssue of ETZ21 on Nikon Z30 (v1.1 firmware) and ZFC (v1.4 firmware)

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3. Version 2.04 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 compati​bility 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 stab​ilization 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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4. Version 2.02 Released Oct 23, 2025 First seen Jul 24, 2026
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   1. Improve compatibility with Sony 1.​4x and 2x Teleconverters.
   2. Improve​ compatibility of some Sony and 3rd party lenses.
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5. Version 2.01 Released Aug 23, 2025 First seen Jul 24, 2026
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   1. Improve c​ompatibility wi​th Zeiss Batis Lenses
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6. Version 2.1 First seen Jul 24, 2026
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   Fix the occa​sion camera f​reeze with F — bug.

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7. Version 2.0 First seen Jul 24, 2026
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   Optimise the focusing performance of older NEX lenses on ​Nikon and realizing Pinpoint focusing.

   Solve the problem of partial Tamron lenses’ focusing hesitation during video shooting with Z9, e.g.

   Tamron 70-180 F2.8 (A056) and Tamron 35-150 F2-F2.8 (A058).

   Correct the EXIF data errors Solve the problem of consumption of battery when the camera is off Improve focusing performance of certain lenses, e.g.

   Tamron 15​0-500 F5.6-7 (A57) No more focus point shifting when the camera wakes up from rest mode or restarts.

   Solve a few small bugs on the software side

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8. Version 1.36 Released May 31, 2024 First seen Jul 24, 2026
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   Optimize the focus ​flow of the Sony 55mm F1.8, and optimized the focus speed. Optimize the focus fluency of Tamron 28-200mm F2.8-5​.6 at the 200mm end, optimize the focus speed.

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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 trans​fer 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 300mm f/2.8 and 70-200m​m 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.

    Targetedly 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.

    Targeted 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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13. Version 1.2.0 First seen Jul 24, 2026
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    Enable autofocus a​bility with older Sony Nex le​nses on ETZ21

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