Actually it is to attach filters to the 18mm 3.5
<https://www.mir.com.my/rb/photography/hardwares/classics/olympusom1n2/shared/zuiko/htmls/18mm.htm>
, which has a bulbous front lens preventing the use of filters without the
49->72mm adapter.
*Frank *
Op ma 8 jul. 2019 om 07:45 schreef Mark Calzaretta <om4ti@xxxxxxxxxxxxxxxx>:
> That ring allows filters to be put on the 16MM Zuiko lens
>
> 49mm filters vignette, even if they are of a thin profile
>
> Sent: Monday, July 08, 2019 at 1:11 AM
> From: "tOM Trottier" <tom@xxxxxxxxxxxxx>
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Subject: Re: [OM] 49- 72mm Olympus Step up ring spotted
> I know 49mm very well. What is the 72mm significance?
> — tom
> On 7 Jul 2019 at 17:47 re:"[OM] 49- 72mm Olympus Step up ring ..."
> William L Barber via olympus(William L Barber via olympus
> <olympus@xxxxxxxxxxxxxxxxx>) wrote:
> > Don’t now if anyone cares anymore, however B&H has one in their Used
> dept
> > currently for $14.95. A great buy if you need one and know what it is
> used
> > for in the OM system. Bill Barber
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