AF Oly 40 150 f2.8 slower than Oly 100-400

I did take quite a lot of shots with Pro Capture L and Burst in AF-C and Oly 40 150 f2.8 seems to focus slower than Oly 100-400

I was wondering why is not full compatible with OM-1 burst mode

Did anybody else experience the same thing?

al404 wrote:

I did take quite a lot of shots with Pro Capture L and Burst in AF-C and Oly 40 150 f2.8 seems to focus slower than Oly 100-400

I was wondering why is not full compatible with OM-1 burst mode

Did anybody else experience the same thing?

Fast, accurate, cheap. Pick any two.

I found the Olympus 100-400 is definitely faster, when the focus limiter is on.
Also stabilization ist better and better stabilization makes it easier for the camera to find focus.

This might explain it.

I believe that when a lens focuses it always uses the widest aperture available to get the most light to focus the 40-150 would therefore have 4x the light. This is why to see what the resulting shot will look like one need to use the DOF preview button which closes the shutter down to see what the DOF for the captured image. I use DOF preview option a lot when shooting macro. Also, for the mentioned lenses I believe the 40-150 has a faster focus motor, but also try to use the Limit switch to minimize the range a lens hunts, especially when using macro like the 60mm macro (which focuses much slower than my old 40-150 Pro). Bottom line, what you are experiencing seems normal

@Albert Valentino 40-150 f2.8 doesn't have any focus limiter switch, I also use the lens mostly wide open

@Skeeterbytes I see that on E-M1 III 40-150 f2.8 is slower in keeping subject in focus with AF-C or ProCapture L

100-400mm is faster

I did shot some dragonfly and 40-150 f2.8 was slower and got less hitrate

C-AF sensitivity setting is +2

I was shooting close up not sure it this can make any difference

I just publish the gallery on flickr ( link below )

I was surprise of 40-150 2.8 being less cable to keep up with insects fast movement since I alway read about how fast it is

https://www.flickr.com/photos/al404/albums/72177720299739252

al404 wrote:

C-AF sensitivity setting is +2

I was shooting close up not sure it this can make any difference

I just publish the gallery on flickr ( link below )

I was surprise of 40-150 2.8 being less cable to keep up with insects fast movement since I alway read about how fast it is

https://www.flickr.com/photos/al404/albums/72177720299739252

I can think of a possible explanation for what you observed.  The OM-1 focuses extremely quickly, if the target is visible in the EVF.  It however, does not focus quickly when the initial focus is poor.  If you were shooting both lenses at 150mm, the 100-400, with the much deeper depth of field for close targets would make the target more visible and more likely to focus.  If you temporarily fail to keep the insect in the frame, again the slower lens with its greater DOF might make refocusing easier.