Help Please

[colinbm]

My UV camera is a Panasonic Lumix G3, M4/3 mount.

I have the Olympus G. Zuiko 20mm f3.5, which I believe has the PenF mount.

I have the PenF to M4/3 adapter.

BUT I don't seem to be able to couple the lens to the adapter ?

There are two levers or buttons on the outside of the lens, which I haven't found what they do either ?

I can couple the adapter to the camera, as is normal.

 

Photos of the items.....

1/ Lens front.

2/ Lens mount.

3/ Adapter label.

4/ Adapter mount.

 

 

 

 

[nfoto]

The flat, broad chromed lever with ridges on top is the lens release lever.

 

The inside-mount black lever is the aperture stop-down.

 

Asking the obvious yet required question: you are sure the lens mount adapter is correct? For my m43 cameras I got the OM-m43 adapter.

[colinbm]

Obviously the adapter is the problem.

So I need the OM to M43 adapter, thanks Birna.

[colinbm]

I see they have very different flange focus distance too.

[dabateman]

No from quick Google search, your lens is pen mount. The OM version was 21mm.

 

So something is up with the adapter. Did you rotate it all around?

[colinbm]

Thanks Dave

The lens & adapter will nest with the red dots aligned, but & can't turn it very far to lock or click in place ?

I can rotate the lens backwards about 8mm on the circumference, but only about 2mm in the locking direction, on the circumference....?

[SteveE]

In the adapter there is a notch at about 9:00 that looks almost like it was hand filed. Did you do that? It also looks to me like there is a burr on the flange just clockwise from the notch.

[colinbm]

Thanks Steve

The notch is stamped out in manufacturing.

Here is a Pen-F body mount.....

[colinbm]

This is the same lens as I have.....

https://www.ebay.com.au/itm/FedEX-OK-AS-IS-Olympus-G-Zuiko-Auto-W-20mm-F-3-5-Lens-for-Pen-F-From-Japan/164243639942?hash=item263daf0e86:g:FeYAAOSwfxReuBBh&frcectupt=true

[colinbm]

Wow.....on Enrico's page this lens appears to turn left to lock. One of the levers on the side of the lens has a red 'L' that clicks into the notch mentioned above.

It must of had a left paw designer....

I have disassembled the Pen-F adapter & without the spring plate under the mount it is working, so I just need to find the errant spring....

[colinbm]

Solved thanks guys & gals...

The problem was the spring plate under the lens mount plate....the spring plate is thin, like 10ths of a mm & there is a thin recess for it to sit in. Slight miss-alignment of the spring plate & one or more of the springs will foul the Pen-F lens bayonet.

Knowing which way the Pen-F lens turns to lock, helps too....it is, counter-clock-wise, ie left-handed !

The M4/3 mount turns clock-wise, ie right-handed.

So it is all AC/DC, but we got there.....

Now to design a better mouse-trap......

Do you know that the person that designed the wheel was an idiot......It was the person that designed the four wheels that was the genius......

[Andy Perrin]

Do you know that the person that designed the wheel was an idiot......It was the person that designed the four wheels that was the genius......

Now you are going to ax-hell.

[colinbm]

Now you are going to ax-hell.

Been there & back a number of times.....

[dabateman]

Glad you got it sorted out.

Different companies turn different ways. I also forget that switching between Nikon and Canon stuff.

[colinbm]

The Olympus OM mount & m4/3 are right-handed, the Pen-F mount is left handed...