Stabilization
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Stabilization

Image stabilization will be the decisive factor for some photographers, but not all. Given Fujifilm's lens lineup is primarily built around stabilized zooms and fast primes (the same approach that's worked well for Nikon and Canon's DSLR systems), many photographers are likely to conclude they don't need a stabilized camera body.

Some kinds of photography, such as macro work, could benefit from it but for many stills shooters it's likely to be a feature that's nice to have, but not necessarily essential.

For many stills shooters IS is likely to be a feature that's nice to have, but not necessarily essential

Stabilization is probably a feature that offers the most benefit to videographers. Unlike lens IS, in-body IS can correct for camera roll, and in our experience so far, it's sufficiently effective to allow the X-T4 to be used without a tripod or gimbal. This pairs nicely with the excellent video spec shared by both cameras.

For really ambitious video work, the X-T3 mounted on a gimbal is arguably the more powerful combination (especially now Fujifilm has added the ability to control the camera from the gimbal), but for ad hoc video shooting, the X-T4's stabilization is a major benefit.