The Canon EOS R6 Mark II has “electronic focus breathing” correction, and it appears that at least some lenses need to be updated to take full advantage of this new feature.
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Kai shows it briefly in his preview, from 6:23 till 6:33:I have yet to see this feature demonstrated anywhere, but it's an intriguing concept for amateur and lower-budget corporate video makers if it works as advertised without artifacting or other weirdness.
I'm hoping for that as well, but reports on other fora imply that not every copy has the same amount of shift. So far I've been lucky enough to be the weakest link when using the RF100, the shift hasn't been an issue yet.Still hoping for Canon to develop a firmware correction for the RF 100 macro's focus shift issue.
Thanks for that, but didn't really get a good impression from that video.Kai shows it briefly in his preview, from 6:23 till 6:33:
Good for you, but not very reassuring in terms of assembly and machining tolerances...I'm hoping for that as well, but reports on other fora imply that not every copy has the same amount of shift. So far I've been lucky enough to be the weakest link when using the RF100, the shift hasn't been an issue yet.
Memories of the first few years of the EF 50 f/1.2L.I'm hoping for that as well, but reports on other fora imply that not every copy has the same amount of shift. So far I've been lucky enough to be the weakest link when using the RF100, the shift hasn't been an issue yet.
Still hoping for Canon to develop a firmware correction for the RF 100 macro's focus shift issue.
I remember watching some preview of Sony or Fuji camera which had focus breathing compensation and was demonstrated and explained well(though none of R6 II videos covered that feature in as much detail).Interesting to see what FW can do.
Would like to hear from RL experiences here.
Thanks for that, but didn't really get a good impression from that video.
Absolutely, so a sophisticated fix would let the camera perform an AFMA like ritual on itself, like I think some DSLRs did with live view, but a simpler fix would be to add a mode where the camera can be set to focus stopped down or partly stopped down, like focus at f8 for an f13 shotI'm hoping for that as well, but reports on other fora imply that not every copy has the same amount of shift. So far I've been lucky enough to be the weakest link when using the RF100, the shift hasn't been an issue yet.
Focus shift isn’t the same as focus breathing, of course, but it could also be compensated for in firmware.Still hoping for Canon to develop a firmware correction for the RF 100 macro's focus shift issue.
YeeshGood for you, but not very reassuring in terms of assembly and machining tolerances...
RF 100 macro's focus shift is a feature but not issue so there will be no firmware to correct it.Still hoping for Canon to develop a firmware correction for the RF 100 macro's focus shift issue.
No, SA adjustment is a feature, focus shift is an issue . And if Canon can correct focus breathing, they sure could correct via firmware focus shift.RF 100 macro's focus shift is a feature but not issue so there will be no firmware to correct it.
Focus shift is a 'feature' (meaning a distinctive attribute) of the RF 100mm Macro lens design. Not a desirable one, but a feature nonetheless. Apparently Canon felt the design tradeoff of going to 1.4x magnification was worth the consequence of focus shift. While it would be possible to address it with firmware, it's a more difficult proposition than correcting focus breathing.No, SA adjustment is a feature, focus shift is an issue . And if Canon can correct focus breathing, they sure could correct via firmware focus shift.
The EF version of the 100mm IS macro had focus shift, it just wasn't as obvious. I don't believe focus shift can be corrected in firmware. Canon has in the past evolved lenses to reduce the effect, the EF 50mm f/1.2L being an example.No, SA adjustment is a feature, focus shift is an issue . And if Canon can correct focus breathing, they sure could correct via firmware focus shift.
One simple way (pointed out above) that would work on MILCs is to have the lens focus at the selected f/stop instead of focusing wide open then stopping down (since it's the latter that causes the shift). That would be quite easy to implement in firmware. It could be implemented as an option, perhaps only being applied at focus distances >0.5x magnification.I don't believe focus shift can be corrected in firmware.
Provided the focus shift is the same in all copies, it's a matter of making a 2D lookup table that maps focus distance to aperture and applying that. In this "high speed RF mount with fast, extra pins" world, this could conceivably be done on the body.The EF version of the 100mm IS macro had focus shift, it just wasn't as obvious. I don't believe focus shift can be corrected in firmware.[...]