Sony FE 100-400mm f4.5 OSS GM Lens - Sony

The minimum focusing distance for the Sony FE 100-400mm f4.5 OSS GM Lens is 0.98 meters (3.22 ft).

While not officially specified for use with teleconverters, compatibility and performance can vary. Consult Sony's official documentation or user reviews for specific teleconverter compatibility.

Yes, the lens features a dust and splash resistant design, but it is not fully waterproof. Avoid prolonged exposure to heavy rain or submersion.

The lens accepts 77mm screw-in filters.

Internal zoom means the lens's physical length does not change when zooming. This improves balance, makes it easier to use with gimbals and stabilizers, and reduces dust ingress compared to external zoom designs.

A constant f4.5 aperture offers a consistent depth of field and exposure across the zoom range. Lenses with wider apertures (like f2.8) allow for more light to enter, resulting in faster shutter speeds or shallower depth of field, but are often larger and more expensive.

Yes, the quiet and smooth operation of the XD Linear Motors makes this lens suitable for video recording, providing reliable autofocus and stable exposure.

Ensure your camera's firmware is up to date. Check that focus modes are set appropriately for the subject. Clean the lens contacts and camera body contacts. Try switching to a single AF point or zone.

Verify that the lens is securely mounted to the camera body. Ensure the correct focal length and aperture are set. Check that Optical SteadyShot (OSS) is enabled if shooting handheld. Ensure focus was accurately achieved on the subject.

Remove and reattach the lens. Clean the electrical contacts on both the lens and camera body. Try the lens on a different compatible camera body to isolate the issue.