Good work Wayne, but this could put a big dent in the $300 profit, we were all
hoping to make :{
Tim Hughes
--- Wayne Harridge <wayneharridge@xxxxxxxxxxxxxxx> wrote:
>
> A few weeks ago there was some discussion about the Olympus hood/filter
> adapter for the OM Zuiko 18mm f3.5. I volunteered to bore out a 49-->72mm
> step-up ring to see if it could be used as a substitute hood/filter adapter.
> I obtained a cheap (about $US7) step-up ring from www.camerafilters.com and
> bored the inside of the 49mm threaded section on the lathe from 45.2mm to
> 46.5mm (same ID as the Oly hood) which fitted perfectly on the 18/3.5 even
> though the threaded section was 0.5mm longer than the Oly version. As the
> step-up ring is flat the front element of the 18/3.5 still projects about
> 1.5 mm from the front of the ring so I added a filter ring from which I had
> removed the glass. As the filter was a fairly thick the resultant hood is
> about 2mm deeper than the Oly hood but allowed me to mount a thin Hoya on
> top of the combination without getting any vignetting.
>
> This link takes you to a page which shows a few images of the step-up ring
> mounted on the 18/3.5:
>
> http://lrh.structuregraphs.com/test/hood.htm
>
> The bottom line is that it seems a substitute hood can be made fairly easily
> if you can't find/afford the original Oly.
>
> ...Wayne
>
>
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