I don't mindgetting a thin filter. Though expensive I'd give it a go.
Thanks
>From: "Nenad Djurdjevic" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: Re: 28-70 F4 SMC FA AL
>Date: Tue, 21 Sep 2004 10:58:14 +0800
>
>Christien Bunting wrote:
>
> > I just came across this lens and I have a few questions.
> > 1) Is it sharp wide open ?
> > 2) How does it compare to the 28-80 F3.5-5.6 FA AL ? (which I have at the
>moment)
> > 3) Are there any quirks I should be looking out for with this lens ?
> > I currently have a 70-210 F4 Rikon lens that I love. F4 is nice. Should I
>trade in my 28-80 for the constant aperture F4?
> > Thanks
> > ps. By chance is there a 70-210 F4 FA anywhere ?
>
>I had the 28-70f4 and I thought it was a great lens. I would still have it
>if its focal length was useful on the *istD. People have complained about
>the build quality but while it is certainly not up to the standards of the
>original F series (that khaki coloured ones) and earlier lenses (A, M,
>etc) - it is no worse than other FA lenses. It is very light and compact,
>sharp, has well controlled distortion, and is one of the only consumer zooms
>with constant f4.
>
>I don't know personally how it would compare optically to the 28-80 F3.5-5.6
>FA AL but it is said to be much better and it is obviously one stop faster
>at the long end (where it matters most).
>
>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.
>
>As an aside:
>When I first bought the lens I didn't know thin filters were available and
>suffered some frustration as I agonised over whether to use a protective
>filter (and suffer vignetting) or use the lens unprotected. In the end I
>discovered and bought an (expensive) UV Hoya Pro-1 filter which also had the
>benefit of a 12 layer multicoating. It was just as well that I got the
>filter as an ostrich I was photographing rushed over and pecked the lens
>putting a small mark on the filter that no amount of cleaning could remove.
>It is possible that Hoya's multi-coating is quite soft as I wouldn't have
>thought an ostrich's beak was very hard. Perhaps the Pentax multi-coating
>(which is supposedly very hard) would have not suffered any damage.
>
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