3.5 Lens built-in VR and camera IBIS functions
This product supports both lens VR (or OS, VC) and IBIS functions. But they don’t work at the
same time. You may choose between them. When the camera is powered on or entering the shooting
mode from the playback mode, the VR switch on the lens decides which one is activated, lens VR or
IBIS. “On” status of the switch at that time enables lens VR and disables IBIS, and vice versa. IBIS will
be automatically enabled if the lens doesn’t have VR function at all. In most cases, IBIS works better
than lens VR unless the lens is a very long telephoto one.
Whatever lens VR or IBIS is chosen, the stabilization function is controlled by “IS MODE” menu
item. If it’s set to “Continuous” (Mode 1), IS functions are activated all the time. When it’s set to
“Shooting only” (Mode 2), lens IS function is enabled when the shutter release button being
half-pressed and disabled about 2 seconds after its release while IBIS function is only enabled during
the exposure. Because of the ages of some F mount lenses, the old design may limit their ability of
instant activation of IS module. Thus, “Shooting only” mode may not work reliably for them. In that
case, “Continuous” mode is suggested.
Caution: IBIS performance of some lenses may be affected if camera is in native lens mode. If you
encountered such a problem when focus bracketing is enabled in SETTINGS.INI, please turn it off to
restore IBIS performance. Check section 3.7.1 for more details.
3.6 In-body vignetting and distortion correction
In-body vignetting and distortion correction profiles for some lenses are embedded in the adapter.
See table 1 for the detailed list. Detail about the relevant configuration items can be found in section
3.7.3.
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