Image Stabilized lenses - how many stops?

mobi1 wrote:

Typically how many stops an image stabilized lens can compensate in a camera with no IBIS?

For example, common kit lens 12-32 mm f3.5-5.6 which has OIS.

Conversely, does this lens at 14 mm with f3.6 behave similarly against Panasonic 14 mm f2.5 since the latter not having IS?

With a 14-45, I average 2 to 3 stops slower than without IS, but I've always been able to hand-hold at 1/ actual focal length, even with adapted lenses in that range.

I don't see the gain at the wide end as much as the long end. I get about 1/8th second regardless of the focal length.

For some reason, I need 1/30th with the 9-18, but the camera defaults to that shutter speed, so I don't really notice the lack of IS. I need shutter speed to avoid motion blur more than IS for camera shake.

mobi1 wrote:

Typically how many stops an image stabilized lens can compensate in a camera with no IBIS?

For example, common kit lens 12-32 mm f3.5-5.6 which has OIS.

This one a bit poorer than others, I have used it on my E-P5 and experimented with OIS only. It seems to deliver about 3 stops at 32mm and struggles to deliver 2 stops at 12mm.

Other lenses like the old Panasonic 14-45mm about 3 stops whatever the focal length and the same for the Panasonic 45-150mm.

So far haven't checked the Power OIS of the 35-100/2.8 but it "feels" like maybe 4 stops at a wild guess. It seems to handle slow shake better than the Mega OIS.

Conversely, does this lens at 14 mm with f3.6 behave similarly against Panasonic 14 mm f2.5 since the latter not having IS?

Can't answer that one.

Naturally I use the IBIS of my E-P5 as that always delivers about 4.5 stops and on good days for me I have reliably achieved 5.5 stops. I budget on 4 stops for a conservative reliability.

On a non IBIS/UUAL IS Panny body (e g. G7, GX1, GX850, GF10, G100), we shall use either OIS or no IS. For IBIS/DUAL IS Panny bodies, for the DUAL IS compatible 12~32, we shall use DUAL IS or no IS.

I use non IBIS cameras (GX800/G100) hence the question.

mobi1 wrote:

Typically how many stops an image stabilized lens can compensate in a camera with no IBIS?

For example, common kit lens 12-32 mm f3.5-5.6 which has OIS.

Conversely, does this lens at 14 mm with f3.6 behave similarly against Panasonic 14 mm f2.5 since the latter not having IS?

I have the 12-32 and the 14mm f2.5

When I use each on an Olympus body and turn the IBIS OFF and only use OIS, I find that I can get about 3 stops advantage with the 12-32. So, the aperture advantage of the 14mm is mute.

I also had the 14-45. For stills, it was OK OIS wise but for video, I just could not hold it steady. Whereas, at the same time with my 12-32, I had no problems holding it steady.

I have shaky hands, so you may do better.

The 12-32 has a two-stage OIS whereas the 14-45 only has one.

I think that the newer Panasonic OIS lenses will work better than the older ones. This is a problem with the 45-200 MkI. The OIS is poor. However, mount this lens on a body with IBIS, and it works very well. I use this lens with my EM5II.

The Panasonic Leica lenses with OIS work very well and can rival Olympus's IBIS.

Allan