7 stops of IS? R6 + RF 35/1.8

Hello!

I wonder at what shutter speeds you can shoot handheld? I now own R6 and rf35/1.8 is rated for 7 stops of shake reduction with this body. So lets do some math. I can shoot at 1/30 without IBIS with this lens. Adding 7 stops means I can shoot handheld at 4 seconds. I tried and best result was about 1 second with 30% chance of success. What am I doing wrong or how do they get 7 stops?

Btw, previously I owned Olympus E-M1ii with 17mm/1.2 (35mm ff equiv.) and I really could take pictures at 2-4 seconds handheld. At 1 second shutterspeed success rate was about 80-90%. And IBIS was rated only for 5 stops.

7 Stops is the CIPA rating, which tests a very specific type of motion and their standards for 'corrected' shake are pretty low.  Typically you won't get that exactly, because a lot depends on your specific type of shake.  I can do 2 seconds on the 35/1.8 and R6, some people will only be able to do 1/2 second.

same here. I've never had much success with IS. It's more of a safety measures to me than something I would rely on for serious use.

I have the same lens and camera as you do. My safest bet on the R6+RF 35mm f/1.8 is about 1/10s with IBIS.  Am I doing anything wrong?

Zxx wrote:

Hello!

I wonder at what shutter speeds you can shoot handheld? I now own R6 and rf35/1.8 is rated for 7 stops of shake reduction with this body. So lets do some math. I can shoot at 1/30 without IBIS with this lens. Adding 7 stops means I can shoot handheld at 4 seconds. I tried and best result was about 1 second with 30% chance of success. What am I doing wrong or how do they get 7 stops?

Btw, previously I owned Olympus E-M1ii with 17mm/1.2 (35mm ff equiv.) and I really could take pictures at 2-4 seconds handheld. At 1 second shutterspeed success rate was about 80-90%. And IBIS was rated only for 5 stops.

I don't think the lens + camera stabilization is linear or cumulative.  From what I have read, it is an either/or relationship, with perhaps a bit more stabilization with both, but not much.

Well, I made a test and it's not that far from 7 stops (and a little beyond sometime).

I was sitting, elbows in air, camera to my eye.

At 0.5s I had 10/10 usable images. Sometime not perfect, but absolutely usable.

At 1s I had 7/10 usable images.

At 2s I had 5/10 usable images.

At 4s I had 5/10 usable images.

At 8s I had 3/10 usable images. One was perfectly sharp.

It really nonlinear. Almost no difference between 2 and 4 seconds. I thought it would be dramatic.

I'll test it more at the walk tomorrow, I hope.

Zxx wrote:

Hello!

I wonder at what shutter speeds you can shoot handheld? I now own R6 and rf35/1.8 is rated for 7 stops of shake reduction with this body. So lets do some math. I can shoot at 1/30 without IBIS with this lens.

Your problem might be you don't have a big problem, as 1/30th is already quite slow.....

Adding 7 stops means I can shoot handheld at 4 seconds. I tried and best result was about 1 second with 30% chance of success. What am I doing wrong or how do they get 7 stops?

You won't get 7 stops on a 35mm lens. You're doing nothing wrong, but that rating simply doesn't translate to the real world.

Btw, previously I owned Olympus E-M1ii with 17mm/1.2 (35mm ff equiv.) and I really could take pictures at 2-4 seconds handheld. At 1 second shutterspeed success rate was about 80-90%. And IBIS was rated only for 5 stops.

Zxx wrote:

Hello!

I wonder at what shutter speeds you can shoot handheld? I now own R6 and rf35/1.8 is rated for 7 stops of shake reduction with this body. So lets do some math. I can shoot at 1/30 without IBIS with this lens. Adding 7 stops means I can shoot handheld at 4 seconds.

I might be wrong, but my understanding was that the rated IS with IBIS was a cumulative number of stops for BOTH lens IS + IBIS.

I do not believe that it is 7 stops of IBIS - in addition to the lens IS.

The bare lens is rated for 5 stops of IS (ie. on a RP for example), so adding IBIS (as in R6) seems to add a further 2 stops of IS, giving a total of 7 stops.

I tried and best result was about 1 second with 30% chance of success. What am I doing wrong or how do they get 7 stops?

Realistically I think that in my experience getting probably 1 stop less than the rated stops of IS is reasonable, although perhaps less likely on shorter focal length lenses.

I would suggest that without IBIS perhaps 4 stops might be achievable - starting with, say, 1/40th, 1/20th, 1/10th, 1/5th, 1/2. Maybe IBIS could give you another 2 stops in some situations, maybe giving you you 1 second or 2 if very lucky.

Getting 7 stops with a 400mm lens might be more realistic because the starting point is much higher.

Bear in mind that this is a "rated" number, and no everyone will achieve that rated number. It is not a guaranteed number.

Btw, previously I owned Olympus E-M1ii with 17mm/1.2 (35mm ff equiv.) and I really could take pictures at 2-4 seconds handheld.

A 4 second shutter speed handheld is impressive.

At 1 second shutterspeed success rate was about 80-90%. And IBIS was rated only for 5 stops.

Did the lenses have built in IS, or was it all IBIS ?

Colin

Andy01 wrote:

I might be wrong, but my understanding was that the rated IS with IBIS was a cumulative number of stops for BOTH lens IS + IBIS.

I do not believe that it is 7 stops of IBIS - in addition to the lens IS.

The bare lens is rated for 5 stops of IS (ie. on a RP for example), so adding IBIS (as in R6) seems to add a further 2 stops of IS, giving a total of 7 stops.

Yeah, you are right, I meant 7 stops of IS, not IBIS. 1/30s was without IS completely and 4s with lens IS and IBIS combined.

Did the lenses have built in IS, or was it all IBIS ?

IBIS only. But it's 2x crop sensor. I mean you have more space in body to move or rotate it to reduce shake.

Hoka Hey wrote:

SteveinLouisville wrote:

I don't think the lens + camera stabilization is linear or cumulative. From what I have read, it is an either/or relationship, with perhaps a bit more stabilization with both, but not much.

It can be cumulative depending on the lens.

Here is a list of the lenses in which it is cumulative:

https://www.thephoblographer.com/2020/07/09/heres-how-the-ibis-system-in-the-canon-eos-r5-and-eos-r6-work/

Thanks for the link!