Icoz, Evrim wrote:
>
> > Let ME clarify. The 28-135mm is sharper at all focal
> > lengths. Check www.photodo.com also Pop Photo.
> > You gain IS which is invaluable handholding
> > the lens which will work at 1/15th seconds.
> > The 72mm filter size is quite standard and found on
> > many of the Canon L lenses.
>
> I disagree about 28-135mm being sharper. I did my own tests,
> and prelim
> results show me that it is on par with 28-105.
>
> fwiw, hand holdingf a 85mm 1.8 and 28-135 IS at 5.6 at 85mm,
> 4x6's show
> quite a difference in sharpness. I didn't think it would be this much.
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I think you got a bad 28-135mm. Mine is tack sharp.
I too have the 85mm F1.8 and 135mm F2L so I have
some good lenses to compare it with.
Pop Photo and Photodo both show the same results with
the 28-135mm being sharper than the 28-105.
As to the F5.6 for the 85mm and zoom, of course the
85mm F1.8 is going to be sharper at that aperture.
Its the middle apertures where a lens shines. F5.6 is
wide open for the zoom. Compare it again at F8 and F11
and you should see very similar results.
Peter K
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