Really sorry to write in English.
Please help me in both English or as you wish, in Chinese, I can read them!
I just bought a brand new M.Zuiko 40-150/2.8Pro zoom with the M.Zuiko 1.4 extender.
When I shot with the extender, I still can get the camera to show F2.8 as maximum aperture!
I though, I would be limited to F4 given 1.4 extending the focal length.
I though it was just a illusion, and I then tested, with the extender, at 2.8, and at 4, not only the shuttle speed was different (which shows the meter was indeed reading with F2.8 amount of light) the broken also shows slight different which is so surprise to me!
Question: Does Olympus has some magic that makes the 40-150 zoom while coupled with 1.4, which is roughly 60 - 225 without loosing half a step of aperture???
Please help me if you know this.
Exactly as what MC-14 spec describes, mounting the extender will lose one stop of light.
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As vhsin964 said, mine works at F4 automatically (with E-M5 body).
I don't think you need to manually adjust anything,
since the extender is both optical and electronic.
In your case, I guess
1. try to upgrade your E-M1 body with the latest firmware
2. re-install your extender again, sometimes it's contact problem like the hotshoe with flash
3. of course it can be either your extender or your body may have some problem
Good luck.
Thanks for all the response and comment. I have finally resolved this miracle issue with my M.Zuiko 40-150 zoom issue with extender.
We all know that optically, not having aperture affected with 1.4X is not possible.
I relook at my zoom, and try to reconnect it back to EM1. Then I found an interesting issue.
Apparently, I did not attach the zoom with the extender properly - meaning, I did not align the red dot first and then twist towards the center to lock. What I had done, was insert the extender into the camera at the reverse angle on the other side of the red-dot and then twist the extender with the zoom back to center to lock.
Apparently, doing so, this extender electric contact was not giving the camera the right limiting F number to 4. But what puzzles me, is that even if I get it wrong, I can get F2.8 with extender and the right corresponding shuttle number! It is higher than f4.0.
I am intrigued by this. I plan to do more testing this coming weekend to find out if IQ wise, any difference. Never had experienced this "UFO" phenomenum before!
celestar wrote:
Hello Guys...(恕刪)
Hi, very interesting.
Waiting for your further test.
Do you mean the ZOOM lens and extender are not aligned, but 180 degree reversed ?
I am curious that how camera passes correct F value to lens, if the electric contact is wrong.
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There are many ways you can connect your zoom with the extender to the body (EM1)
The correct way is to align the red dot on the extender with the body of the EM1, then you twist till the extender lock in place with the camera body.
You then repeat the same with the zoom and now align with the extender which is already on the body. OK, if you do this, everything works out fine!
What I did, or I think I had done was, I connect the extender to the zoom first (which is nothing wrong by the way, you can do both way), instead of then aligning the red button to the EM1 body red dot, I did it on the other way round. (Let me explain with an example, if the EM1 red dot is at 9 o'clock position, I insert in at 3 o'clock and then twist to the center. It did lock and suddenly, you get F2.8 even with extender on!
I believe it is the metal connector issue but I am not sure.
But interesting enough, you get right meter reading at F2.8 with extender on.
I am going to do a bit more testing this week end to check to see if the F2.8 with extender really give no degrading IQ.
Stay tuned Guys!
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