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AstrHori

⚠️ Before Firmware Update

Before performing an update, please read the instruction manual or the precautions below and follow the correct procedure.
Please note that if the update is performed incorrectly, the product may not function properly.

📄 AstrHori AF Lens Firmware Update Instructions (PDF)

AstrHori AF 85mm F1.8 II

Sony E-mount

*Latest firmware (as of March 31, 2026)

⬇️ [V1.05 Download]

【Update Details】

  • Improved compatibility and adaptability with camera bodies
  • Optimized overall operational stability of the lens
  • Fixed known bugs to provide a more comfortable operating experience

Nikon Z-mount

*Latest firmware (as of March 31, 2026)

⬇️ [V1.20 Download]

【Update Details】

  • Improved exposure accuracy in specific shooting scenarios for some models
  • Improved smoothness of aperture adjustment operations on the camera body
  • Optimized focus response when operating the focus ring for some models
  • Improved compatibility with some models
  • Fixed known bugs and improved overall stability

Leica L-mount

*Latest firmware (as of March 31, 2026)

⬇️ [V1.12 Download]

【Update Details】

  • Improved compatibility with camera bodies

AstrHori AF 27mm F2.8 STM

Sony E-mount

*Latest firmware (as of March 31, 2026)

⬇️ [V1.01 Download]

【Update Details】

  • Improved compatibility with camera bodies

Nikon Z-mount

*Latest firmware (as of March 31, 2026)

⬇️ [V1.20 Download]

【Update Details】

  • Improved exposure accuracy in specific shooting scenarios for some models
  • Improved smoothness of aperture adjustment operations on the camera body
  • Optimized focus response when operating the focus ring for some models
  • Improved compatibility with some models
  • Fixed known bugs and improved overall stability

AstrHori Light Meter XH-2

SG-image

⚠️ Before Firmware Update

Before performing an update, please read the instruction manual or the precautions below and follow the correct procedure.
Please note that if the update is performed incorrectly, the product may not function properly.

📄 SG-image AF Lens Firmware Update Instructions (PDF)

SG-image AF 55mm F1.8 STM

Nikon Z-mount

⬇️ [V1.0.4 Download]

【Update Details】

  • Improved issue where returning from standby mode switches to MF and cannot return to AF on Z50II, Zf, and Zfc.
  • Improved issue where focus speed slows down when repeatedly touching to move focus in AF-C mode on Z6III.
  • Improved issue where exposure is inappropriate when shooting with a small aperture using maximum aperture control (Iv function) on Z8.

SG-image AF 25mm F1.8

Sony E-mount

*Latest firmware (as of March 13, 2026)

⬇️ [V.13 Download]

【Update Details】

  • Optimized lens distortion correction
Show previous versions

[V.10 Download]

Update Details: Changed EXIF information to "SG-image 25mm F1.8 E"

[V.08 Download]

Update Details: Optimized focus issue during video recording after AF activation on some cameras


Fujifilm X-mount

*Latest firmware (as of March 13, 2026)

⬇️ [V1.10 Download]

【Update Details】

  • Optimized lens distortion correction
Show previous versions

[V1.08 Download]

Update Details:
・Improved focus stability
・Improved communication stability

[V1.04 Download]

Update Details:
・Focal length adjustment
・AF performance optimization
・Improved stability


Nikon Z-mount

*Latest firmware (as of November 26, 2025)

⬇️ [V1.02 Download]

【Update Details】

  • Optimized AF stability
  • Improved issue where some cameras cannot go to sleep

Viltrox


VILTROX TELECONVERTER 2.0x

VILTROX TELECONVERTER 2.0x Compatible Lens List

📄 VILTROX TELECONVERTER 2.0x 20260623 (PDF)