Michael,
Did you use Olympus' adapter setp up ring ?
If yes, did you use Olympus filter ?
If no, you should have used one of those
thin rimmed filters such as Hoya's Ultra
filters.
This brings me the question of what aperature
does this lens (Zuiko 18mm/f3.5) show
vignetting with proper filter/step up ring
were used. Does anyone in the list have
experience ?
Jim Terazawa
Michael O'Carrigan wrote:
> Further to the question Re: filters for the 18mm Zuiko.
>
> The lens has a 49mm filter thread at the front element, but as the front
> element protudes some 5mm past this, Olympus has made a 49mm to 72mm
> adapter ring to allow enough clearance to fit a 72mm filter in front of the
> lens.
>
> The 18mm is almost like a fisheye lens without the internal filters the 8mm
> and 16mm Zuiko's have.
>
> I fitted the 72mm filters I have used on my 300mm, and the result was
> vignetting. The 72mm filters were made by Tiffen and Hoya. The rim on
> most is 5mm thick with the polariser being 7mm.
>
> Thanks for the help and I will look at the Hoya HMC's.
>
> Michael.
>
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