Virtually every lens can and is in fact designed to focus beyond infinity at normal temperatures. As ambient temperature increases, the metal or composite barrels can expand slightly. This in turn can slightly increase focal length, requiring a bit of extra focus extension to compensate. Conversely, this difference grows in colder temperatures as the barrel materials shrink, requiring less extension for infinity, allowing a lens to be focused even further beyond infinity. Obviously the effect is less critical on shorter focal lengths than for telephoto lenses, but present nonetheless.
Good AF should —and in my experience with later model Fuji camera bodies and AF lenses does— compensate adequately. Folks that use manual focus and assume the far “stop” on their focus ring is infinity are going to over-focus frequently. Folks that know how to rely on hyper-focal for their chosen aperture, will always focus at least slightly behind infinity and know to never rely on the focus ring stop point…
Jan 04, 2026 at 01:10 PM
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