[OM] Re: actual 18 mm value at the moment?

[Wayne Harridge]

> part behind the threads is really thin. I'd be interested to see if a 
> generic one cut down in a lathe as Wayne suggests would be 
> strong enough.
> 

I've now got a generic (camerafilters.com $US7) 49-->72mm ring on order so
I'll give it a try when it arrives.  Another problem may be the actual shape
of the "hood", the Oly is a very shallow cone which ensures that when you
screw on a filter there is adequate clearance between the front element of
the 18/3.5 and the filter - there may not be enough clearance with the
generic step up ring.

...Wayne
 


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