jcolwell wrote:
Conventional wisdom says that you don't need IS (or MLU) for long exposures, certainly for those minutes long, and so the artifacts you show are certainly caused by the camera, in some manner.
I've noticed that my M5 and M6 Canon mirrorless cameras have in-lens IS active all of the time, unless it's explicitly shut off. OTOH, all of my many EOS DSLR are quite happy to let the IS shut down, when appropriate. I wonder if the R-series cameras have this tendancy to leave IS active (when not shut off). If this tendancy is also followed for in-body IS (when it's not explicitly set off), then uncorrected sensor-drift (i.e. integration error) could cause issues.
Jeff wrote:
I wonder as well! If there weren't nearly 1000 pages to the two manuals I might have gotten through it all, but the robust menu system options makes it all hard to keep straight...
And now, this is becoming the crux of the aberrant behavior for me, just WTH is the IBIS system doing, and how can I control it?
Regarding the IS menu item being unavailable to me most of the time, here is what I experience:
RF lens attached, lens IS on: IS menu is unavailable
RF lens attached, lens IS turned off: IS menu is unavailable
non-Canon lens (w/out IS) attached using Canon adapter: IS menu is unavailable
non-Canon w/lens IS attached via Canon adapter (IS on or off): IS menu is unavailable
Canon EF lens w/IS attached via Canon adapter (IS on or off): IS menu is unavailable
Canon RF lens w/out IS attached: IS menu is available
Again, I seriously must be missing something here with Canon's implementation! Instead of the menu option telling me "IS setting is unavailable with lens attached", why not tell me the status of the two systems, i.e. "Lens IS is ON, IBIS is OFF", or whatever. I really have no idea what the camera is actually doing.
For all the people who suggested I turn IBIS 'off', I'd be thrilled if you can tell me:
1) How to turn IBIS 'off' with the 5 lens classes listed above; and
2) How to tell if IBIS is indeed turned on or off, via the camera menu system (or EXIF info, after the fact).
Again, I'm all ears.
Having to purchase the Canon RF50/1.8 lens in order to access the menu seems to me to be a bug, not a feature. However, Canon did end up selling one more lens, even though I didn't actually buy it for that purpose...
Mar 16, 2021 at 10:35 AM
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