What does OSS Mode 2 actually do?

[arbielcreative]

What does OSS Mode 2 REALLY do on Sony's big white telephoto lenses?

Most information I could find on the OSS modes paraphrases the manuals, stating what situation each mode is for, but doesn't explain how they work. Mode 1 is for “normal camera shake”. Mode 2 is for “panning”. Mode 3 “minimizes framing disturbances” for “irregularly moving subjects” like “in sports games” or “birds in flight”.

Mark Galer’s great video on SteadyShot Settings from January 2022 does goes into more detail, saying Mode 2 disables one of the gyros to permit movement from left to right. From other digging, I assume by gyro, he means a system for both sensing and correcting motion along one degree of freedom. And I assume there are two orthogonal gyros in the lens, one assigned for yaw and one for pitch.

Does one gyro actually get turned off in Mode 2 per Mark? This seems illogical as panning would rarely be aligned with solely yaw or pitch. Rather, motion is likely across a "diagonal", for lack of better term. And unless the two gyros do not talk, I would think it’s computationally trivial for them to jointly sense the direction of this diagonal, then have correction applied orthogonal but not in line with it.

If one gyro DOES get disabled in Mode 2, which one is it? Mark says movement left to right is permitted, so does the system always disable the yaw gyro? That would mean I should avoid Mode 2 for vertical panning like a bird or aerobatic plane diving, right?

If it IS the yaw gyro that get disabled, does the body/lens compensate for shooting orientation? If I’m shooting/recording in portrait mode (I dislike it but reels are here to stay), will pitch and yaw gyros swap designations to always only permit motion parallel to the ground?

For context, I use the 70-200 GM II and the older 100-400 GM with the A7R III and A7 IV. I am aware shutter speed is the best way to deal with shake. I am aware that IBIS is distinct from OSS (though not entirely clear on how they interact). I am also aware, for shooting video on newer bodies, an Active Stabilization feature exists, and gyro metadata can be used for stabilization in post. I just want to better understand OSS Mode 2 here.

Thanks!

 

[dazzerfong]

What does OSS Mode 2 REALLY do on Sony's big white telephoto lenses?

Most information I could find on the OSS modes paraphrases the manuals, stating what situation each mode is for, but doesn't explain how they work. Mode 1 is for “normal camera shake”. Mode 2 is for “panning”. Mode 3 “minimizes framing disturbances” for “irregularly moving subjects” like “in sports games” or “birds in flight”.

Mark Galer’s great video on SteadyShot Settings from January 2022 does goes into more detail, saying Mode 2 disables one of the gyros to permit movement from left to right. From other digging, I assume by gyro, he means a system for both sensing and correcting motion along one degree of freedom. And I assume there are two orthogonal gyros in the lens, one assigned for yaw and one for pitch.

Does one gyro actually get turned off in Mode 2 per Mark? This seems illogical as panning would rarely be aligned with solely yaw or pitch. Rather, motion is likely across a "diagonal", for lack of better term. And unless the two gyros do not talk, I would think it’s computationally trivial for them to jointly sense the direction of this diagonal, then have correction applied orthogonal but not in line with it.

If one gyro DOES get disabled in Mode 2, which one is it? Mark says movement left to right is permitted, so does the system always disable the yaw gyro? That would mean I should avoid Mode 2 for vertical panning like a bird or aerobatic plane diving, right?

If it IS the yaw gyro that get disabled, does the body/lens compensate for shooting orientation? If I’m shooting/recording in portrait mode (I dislike it but reels are here to stay), will pitch and yaw gyros swap designations to always only permit motion parallel to the ground?

For context, I use the 70-200 GM II and the older 100-400 GM with the A7R III and A7 IV. I am aware shutter speed is the best way to deal with shake. I am aware that IBIS is distinct from OSS (though not entirely clear on how they interact). I am also aware, for shooting video on newer bodies, an Active Stabilization feature exists, and gyro metadata can be used for stabilization in post. I just want to better understand OSS Mode 2 here.

Thanks!

Mode 1 is regular OSS - turns on when you half-press the shutter and when taking a picture. Works both horizontally and vertically.

Mode 2 is the same as regular OSS except one single axis, the axis with the most amount of movement in. So yes, it'll still work for vertical panning. If you're panning in both directions, it doesn't work as well, that's when you switch off the OSS.

Mode 3 (for completion) disables OSS until you actually take the shot. That way when you're moving the camera quickly the OSS doesn't fight your framing.

 

[arbielcreative]

Thanks! This clears things up a bit.

Sorry for the repeat post. I had just registered and my first attempt to post didn't show up for several days and I mistakenly thought moderation struck it.