EP-2 autofocus with 20mm F1.7 issue

jonboy62

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I just received a 20mm pancake and discovered that it will autofocus in S-af only in iAUTO (but not in the other modes) or by C-af in all modes, P,A,S..
Firmware is up to date.

Is this an anomoly or correct for this lens and camera? I don't care for the continuous focus hunt.

Jon
 

jonboy62

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I have watched Brian's tutorial. I have gone thru every setting, re-setting I can think of to no avail..

Do you suppose the lens is defective?
 

BBW

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I'm thinking it must be.

Can you post some photos by either uploading to the gallery and inserting here or if you use Flickr...you can post here and we can read the EXIF data? I'm just wondering if it might help - sort of grasping at straws.:confused:
 

jonboy62

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I have also noticed a clicking noise from the lens when it is in S-af (but does not focus) that is similar to the noise it makes when it does focus in C-af.

I am going to send it back to Adorama for and exchange/repair.
 

Brian Mosley

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Have you checked that the contacts in your lens are clean? have you any problems with any of the other lenses you use?

Cheers

Brian
 

jonboy62

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Well. I was just about to write that the kit lens works fine, but alas it seems to be the camera. The 14-42 behaves the same way. Damn!

So I am off to Olympus so see what they say.
 

jonboy62

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I will stand for a figurative butt-kicking.

My almost 64 year old wife/gramma/techie asks what I am fussing about and says "did you try a reset?" Duh!

All better now. Thanks to you all with your efforts to help. Start with the simple stuff and work up... that's my new motto!

Jon
 

PeterB666

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I have also noticed a clicking noise from the lens when it is in S-af (but does not focus) that is similar to the noise it makes when it does focus in C-af.

I am going to send it back to Adorama for and exchange/repair.
The clicking sound is the aperture opening and closing. This is a quirk of the Panasonic lenses on the Olympus cameras but most noticable in the 20mm f/1.7 as it is more likely to do it due to the wider aperture and the lens itself is very noisy (mechanically). I guess that the camera is trying to limit excess light to the sensor.

It doesn't affect the performance of the lens other than in very low light where it tends to take exposure readings stopped down to around f/2.8. This means a darker LCD and less sensitive metering. Exposure readings still seem fair enough.
 

generationally

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The clicking sound is the aperture opening and closing. This is a quirk of the Panasonic lenses on the Olympus cameras but most noticable in the 20mm f/1.7 as it is more likely to do it due to the wider aperture and the lens itself is very noisy (mechanically). I guess that the camera is trying to limit excess light to the sensor.

It doesn't affect the performance of the lens other than in very low light where it tends to take exposure readings stopped down to around f/2.8. This means a darker LCD and less sensitive metering. Exposure readings still seem fair enough.
Is this only supposed to happen with Panasonic lenses? I get quite a lot of clicking (aperture adjusting itself) with the Olympus 17mm f2.8 and a bit also with the kit lens 14-42mm on my E-P1. Also when clicking happens the LCD live view picture freezes for a split second. Anyone seeing the same thing?
 

PeterB666

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I don't know. I don't hear it on either of my Olympus lenses (14-42 and 9-18) but I cannot hear the aperture on either of those (my hearing is not perfect) so it could well be. It would make sense.

The Panasonic 20mm lens is one very noisy lens. I also have the Panasonic 45-200 zoom and it also does the aperture thing but it is less frequent as the lens only starts at f/4-5.6 so misses the closing down to f/2.8 which is what the 20mm lens likes to do at rest in poor light.
 

generationally

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Yes, the clicking sound is not very audible. I only noticed it due to the freezing of the LCD liveview and looking through the lens and seeing the aperture close and open.

It only seems to happen when lighting conditions change a lot. I can trigger it by repeatingly putting/taking away the hand in front of the lens. In practical use cases it is not really a problem.
 

jonboy62

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For anyones' memory bank; Mike the tech from Olympus suggested a remedy (just the one I found on my own) for the problem. Put the camera in P and run the custom reset.

He found that when the battery is removed when the camera is on it causes a firmware glitch that affects autofocus.
 

Brian Mosley

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Interesting tip... did you try the custom reset in any other mode? I wonder why it needs to be in P?

Cheers

Brian
 

jonboy62

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To clarify, the tech wrote that removing the battery while the camera was on would cause this malady.
I don't usually change a battery or remove a memory card without turning off the camera, and don't remember if I DID take the battery out while on. I do know better, so who knows.
I also don't remember what program setting I was on when I got the reset to work; I got the camera reset before I got the email from Olympus telling me there was the solution I had found.

So, thanks for all the gentle concern about my battery habits... all's well that ends well.

Jon
 

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