Summary
7Artisans has released firmware V1.33 for the AF 135mm F1.8 MAX in L-mount, targeting aperture and exposure stability in certain shooting conditions.
This is a corrective update for the existing full-frame telephoto lens, not a new optical version or an announced autofocus upgrade.
What firmware V1.33 fixes
7Artisans says the update improves aperture and exposure stability under certain conditions. The company does not specify which settings or camera bodies were affected, nor does it provide measurements of the improvement.
Consistent aperture behavior matters when shooting repeated portraits, sequences using identical exposure settings, and video clips where an unexpected brightness shift may be visible. The announcement, however, does not identify separate video-specific fixes.
V1.33 follows the earlier firmware releases for 7Artisans L-mount lenses, which brought this 135mm lens to V1.31. That release concerned focus-ring operation and system compatibility.
Affected lens and download instructions
This announcement specifically covers the 7Artisans AF 135mm F1.8 MAX in L-mount. It does not announce V1.33 for Sony E or Nikon Z. The Nikon Z version received a separate firmware release with a different version number.
The lens, released for Sony E and L-mount in the summer, features a USB-C port at the mount for firmware updates. Make sure to select the file for the exact lens model and L-mount version before installation.
The official AF 135mm F1.8 L-mount firmware download page is under Full Frame Lenses on the 7Artisans site. Find AF 135mm F1.8 and select “L – Mount.” The company provides a mount-specific upgrade archive; check the version listed for the file before installing.
More information here.
What we think
With an f/1.8 portrait lens, exposure inconsistencies can become frustrating even when focus is accurate. This fix therefore matters in practice, although it introduces no headline-grabbing new feature.
We would prefer a more specific explanation of the conditions that trigger the issue. Without that detail, photographers cannot readily determine whether their own shooting setup was affected or exactly what should change after updating.
Successive releases nevertheless show that 7Artisans is continuing to support the lens after launch. That is particularly relevant for photographers investing in third-party optics and expecting reliable communication between lens and camera body.
Frequently asked questions
Does V1.33 also apply to Sony E or Nikon Z?
Not according to this announcement. V1.33 is specifically identified for the AF 135mm F1.8 MAX in L-mount.
Where can I download the firmware?
From the official 7Artisans firmware page, under Full Frame Lenses, AF 135mm F1.8, then L – Mount.
