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I'm considering returning my EF-M 22mm f/2 lens....

Started 7 months ago | Discussions thread
R2D2 Forum Pro • Posts: 26,528
Re: I'm considering returning my EF-M 22mm f/2 lens....

nnowak wrote:

TrackDayLT4 wrote:

Jayson A wrote:

R2D2 wrote:

  1. TrackDayLT4 wrote:

Jayson A wrote:

Holy cow. How the heck did it pick up the sticks? I put the focus directly on the rock. This lens is too hard to turn for manual focus (it feels too tight), so I have to use auto focus.

I think you are all correct. I had to use a low f stop because it was fairly dim out there. I know it's not the best picture, but that seems to be one of the ones where I just couldn't get a sharp image from it. Is there a way in Adobe Bridge or something to see where the focus was set? Surely that's saved somewhere in the metadata.

Something is wrong with this lens, it should not feel to tight to manually focus. I would return it and exchange for one that works correctly.

I missed that part. Something definitely wrong there!

Could indeed be why it’s mis-focusing.

R2

Correct me if I'm wrong, but isn't the focus decided by the dual-pixel auto focus, not by the lens itself? Once the camera sees that the focus area is sharp, then it allows you to take the photo doesn't it?

Also, doesn't the focus ring just move the electronic focus motor, so even if the ring itself is tight, it doesn't really mean there's something wrong with the stepping motor inside right?

if the manual focus is tight, that means it is binding on something because of misalignment. Misalignment can extend to the optical elements which means that the lens will never be sharp. Autofocus just determines the sharpest focus the lens is capable of which as seen in your pictures is very poor. Send it back and get one that is not damaged.

The manual focus ring on the EF-M 22mm has no mechanical coupling to the optical elements. It is solely a rotary encoder that sends an electrical signal to the stepper motor.

It could certainly be an indicator that something else is messed up (ie misaligned) in there however. Or perhaps the “rotary encoder” is pegged all the way resulting in misfocus.

The OP is lucky he could return it.

R2

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