Image stabilization and tall buildings

[neuroanatomist]

I am not an IS expert, but how I would think it works:

1. For Canon the IS system senses either 2 axis of rotation (pitch-yaw) or the newer IS systems have 3 axis of rotation (pitch-yaw-roll).

Lens-based IS does not and cannot have correction for roll – the lens elements are round, rotating them would not change the image. Only sensor-based IS can correct for roll.

I'll just add a 4.1 to Pat's list. Some lens have "automatic panning detection", so there is multi-mode IS, but it is not user selectable.

Indeed. In fact, when the EF-S 18-55mm f/3.5-5.6 IS was updated to the MkII version (prior to the STM), the lenses were identical except for some cosmetic changes (labeling font, a silver ring made black, mount registration mark painted instead of embossed), and the addition of automatic panning detection to the IS system.

[conropl]

Lens-based IS does not and cannot have correction for roll – the lens elements are round, rotating them would not change the image. Only sensor-based IS can correct for roll.

What you say makes sense, and I do not doubt you. I got that from and article I read when I was trying find out how many axis they actually sense, and I admit I did not think about their answer enough to question its accuracy.

Got the information from: http://www.brayebrookobservatory.org...OIS_M%26M.html
Quoting:
"The lens-based OIS designed by Canon initially compensated for pitch & yaw. Their latest OIS can in a few specific lenses also compensate for either roll (limited rotation - angle movement in pitch but also simultaneous side to side), pitch & yaw (Hybrid IS), or pitch, yaw & piston"

Thanks for setting the record straight.

Pat

[neuroanatomist]

Got the information from: http://www.brayebrookobservatory.org...OIS_M%26M.html
Quoting:
"The lens-based OIS designed by Canon initially compensated for pitch & yaw. Their latest OIS can in a few specific lenses also compensate for either roll (limited rotation - angle movement in pitch but also simultaneous side to side), pitch & yaw (Hybrid IS), or pitch, yaw & piston"

Reading over that article, it appears the author misconstrues the functions of Canon's Hybrid IS, or that they simply don't understand what 'roll' actually is...

Quoting:
"During the summer 2009 Canon announced roll compensation in some of its forthcoming mid-range telephoto lenses."

That was the announcement of the EF 100mm f/2.8L Macro IS, and Canon certainly did not say or even imply correction for roll. Hybrid IS adds correction for 'shake' (translational motion in the X and Y directions) to the typical corrections for angular motion (pitch and yaw).

The 5 axes are:



In a nutshell, sensor-based IS can correct up to all five, lens-based IS can correct up to four (excluding #5).