Would a Cokin P system work also ? Or does the front of the lens rotate ?
>From: "William Robb" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: Re: 28-70 F4 SMC FA AL
>Date: Mon, 20 Sep 2004 23:31:16 -0600
>
>
>----- Original Message -----
>From: "Nenad Djurdjevic"
>Subject: Re: 28-70 F4 SMC FA AL
>
>
>
> > The 28-70f4 has one quirk and that is that it needs filters with
>extra-thin
> > frames as normal thickness filter rings cause it to vignette at the
>28mm
> > setting (causing a slight darkening of the corners). I would guess
>that
> > even the thinnest polarising filters would be out of the question.
>
>You can workaround this by using a step-up ring and a larger filter
>size. A 52-58mm step up should be ample.
>
>William Robb
>
>
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